1/41
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
CMOS LDO Regulators for Portable Equipments
1ch 200mA
CMOS LDO Regulators
BU□□TD2WNVX series
●Description
BUTD2WNVX series is high-performance FULL CMOS regulator with 200-mA output, which is mounted on micro
miniature package SSON004X1010 (1.0 mm 1.0 mm 0.6 mm). It has excellent noise characteristics and load
responsiveness characteristics despite its low circuit current consumption of 35µA. It is most appropriate for various
applications such as power supplies for logic IC, RF, and camera modules. Micro miniature SSON004X1010 with built-in
heatsink is adopted for the package, which contributes to the space-saving design of the set.
●Features
1) High-accuracy output voltage of 1% (25 mV on Vout<2.5V products)
2) High ripple rejection: 70 dB (Typ., 1 kHz,)
3) Compatible with small ceramic capacitor (CIN=Co=0.47 µF)
4) Low current consumption: 35 µA
5) ON/OFF control of output voltage
6) With built-in overcurrent protection circuit and thermal shutdown circuit
7) With built-in output discharge circuit
8) Adopting ultra-small package SSON004X1010
●Applications
Battery-powered portable equipment, etc.
●Line up
■200 mA BU□□TD2WNVX Series
Product Name 1.0 1.2 1.5 1.8 1.85 1.9 2.0 2.1 2.3 2.5 Package
BU□□TD2WNVX
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
SSON004X1010 2.6 2.7 2.8 2.85 2.9 3.0 3.1 3.2 3.3 3.4
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Model name：BU□□TD2WNVX
a
Symbol
Contents
Specification of output voltage
a
□□ Output voltage (V) □□ Output voltage (V) □□ Output voltage
(V) □□ Output voltage (V)
10 1.0 V(Typ.) 19 1.9 V(Typ.) 26 2.6 V(Typ.) 30 3.0 V(Typ.)
12 1.2 V(Typ.) 20 2.0 V(Typ.) 27 2.7 V(Typ.) 31 3.1 V(Typ.)
15 1.5 V(Typ.) 21 2.1 V(Typ.) 28 2.8 V(Typ.) 32 3.2 V(Typ.)
18 1.8 V(Typ.) 23 2.3V(Typ.) 2J 2.85 V(Typ.) 33 3.3 V(Typ.)
1J 1.85 V(Typ.) 25 2.5 V(Typ.) 29 2.9 V(Typ.) 34 3.4 V(Typ.)
No.11020EBT07
Technical Note
2/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Absolute maximum ratings
Parameter Symbol Ratings Unit
Maximum applied power voltage VMAX -0.3 ~ +6.5 V
Power dissipation Pd 560(*1) mW
Maximum junction temperature TjMAX +125 ℃
Operational temperature range Topr -40 ~ +85 ℃
Storage temperature range Tstg -55 ~ +125 ℃
(*1) When PCB (70 mm 70 mm, thickness 1.6-mm glass epoxy) a standard ROHM board is implemented.
Reduced to 5.6 mW/℃ when used at Ta=25℃ or higher.
●Recommended operating range (Do not exceed Pd.)
Parameter Symbol Ratings Unit
Input power supply voltage VIN 1.7 ~ 5.5 V
Maximum output current IMAX 200 mA
●Recommended operating conditions
Parameter Symbol
Ratings Unit Conditions
Min. Typ. Max.
Input capacitor CIN 0.22(*2) 0.47 － µF A ceramic capacitor is recommended.
Output capacitor CO 0.22(*2) 0.47 － µF A ceramic capacitor is recommended.
(*2) Set the capacity value of the capacitor so that it does not fall below the minimum value, taking temperature characteristics,
DC device characteristics, and change with time into consideration.
Technical Note
3/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Electrical characteristics(Ta=25℃, VIN=VOUT+1.0V(*3), STBY=VIN, CIN=0.47μF, CO=0.47μF, unless otherwise noted.)
Parameter Symbol
Limits Unit Conditions
Min. Typ. Max.
Overall Device
Output Voltage VOUT
VOUT
×0.99 VOUT
VOUT
×1.01 V
IOUT=10µA,VOUT≧2.5V
VOUT
-25mV
VOUT
+25mV IOUT=10µA,VOUT＜2.5V
Operating Current IIN - 35 60 µA IOUT=0mA
Operating Current (STBY) ISTBY - - 1.0 µA STBY=0V
Ripple Rejection Ratio RR 45 70 - dB VRR=-20dBv,fRR=1kHz,IOUT=10mA
Dropout Voltage VSAT
- 280 540 mV
2.5V≦VOUT≦2.6V
(VIN=0.98*VOUT,IOUT=200mA)
- 260 500 mV
2.7V≦VOUT≦2.85V
(VIN=0.98*VOUT,IOUT=200mA)
- 240 460 mV
2.9V≦VOUT≦3.1V
(VIN=0.98*VOUT,IOUT=200mA)
- 220 420 mV
3.2V≦VOUT≦3.4V
(VIN=0.98*VOUT,IOUT=200mA)
Line Regulation VDL - 2 20 mV VIN=VOUT+1.0V to 5.5V(*4)
IOUT=10µA
Load Regulation VDLO - 10 80 mV IOUT=0.01mA to 100mA
Over-current Protection (OCP)
Limit Current ILMAX 220 400 700 mA Vo=VOUT*0.95
Short Current ISHORT 20 70 150 mA Vo=0V
Standby Block
Discharge Resistor RDSC 20 50 80 Ω VIN=4.0V, STBY=0V, VOUT=4.0V
STBY Pin Pull-down Current ISTB 0.1 0.6 2.0 µA STBY=1.5V
STBY Control Voltage
ON VSTBH 1.2 - 5.5 V
OFF VSTBL -0.3 - 0.3 V
* This product does not have radiation-proof design.
(*3) VIN=2.5V for VOUT≦1.5V
(*4) VIN=2.5V to 5.5V for VOUT≦1.5V
●Electrical characteristics of each Output Voltage
(Ta=25℃, STBY=VIN, CIN=0.47μF, Co=0.47μF, unless otherwise noted.)
Parameter Symbol Limits Unit Conditions
Min. Typ. Max.
1.2V
Maximum
output current
80 160 -
mA
VIN=1.7V
200 - - VIN=2.1V
1.5V
60 120 - VIN=1.8V
200 - - VIN=2.2V
1.8V 200 - - VIN=2.4V
1.9V 200 - - VIN=2.5V
Technical Note
4/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.4 Stability area characteristics (Example)
0.01
0.1
1
10
100
0 50 100 150 200
IOUT [mA]
ESR [Ω]
ESR [Ω]
●Block diagram, recommended circuit diagram, and pin configuration diagram
BU□□TD2WNVX
●Input / Output terminal equivalent circuit schematic
1pin (VOUT) 2pin (GND) 3pin (STBY) 4pin (VIN)
Fig.2 Input/Output equivalent circuit
●About input/output capacitor
It is recommended to place a capacitor as close as possible to
the pins between the input terminal and GND or between the
output terminal and GND.
The capacitor between the input terminal and GND becomes
valid when source impedance increases or when wiring is long.
The larger the capacity of the output capacitor between the
output terminal and GND is, the better the stability and
characteristics in output load fluctuation become.
However, please check the status of actual implementation.
Ceramic capacitors generally have variation, temperature
characteristics, and direct current bias characteristics and the
capacity value also decreases with time depending on the
usage conditions. It is recommended to select a ceramic
capacitor upon inquiring about detailed data of the related
manufacturer.
●About the equivalent series resistance (ESR) of a ceramic capacitor
Capacitors generally have ESR (equivalent series resistance)
and it operates stably in the ESR-IOUT area shown on the right.
Since ceramic capacitors, tantalum capacitors, electrolytic
capacitors, etc. generally have different ESR, please check the
ESR of the capacitor to be used and use it within the stability
area range shown in the right graph for evaluation of the actual
application.
PIN No. Symbol Function
1 VOUT Voltage output
2 GND
Grounding
3 STBY
ON/OFF control of output voltage
(High: ON, Low: OFF)
4 VIN
Power input
Fig.3 Capacity – bias characteristics
4
3
1
2
Cin
VIN
GND
STBY
VSTBY
VOUT
VOUT
Co
VREF
OCP
STBY Discharge
TSD
VIN
Fig.1 Recommended circuit diagram
Recommended ceramic capacitor for Cin & Co
Murata Manufacturing Co., Ltd.
GRM188B11A474KA61D
Capacity value of ceramic capacitor - DC bias characteristics
(Example)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
00.511.522.533.54
DC Bias Voltage [V]
Capacitance Change [%]
10-V withstand voltag e
B1char acter i sti cs
GR M 188B11A10 5KA61D
10-V wi ths tand voltag e
B char acter ist ics
6.3- V wi thstand voltag e
B char acter i s ti c s
4-V withstand voltag e
X6S characteri sti cs
10-V withstand voltag e
F c har acter i sti cs
10- V withs tand vol tag e
F c har acter i sti cs
Stable region
Unstable region
Cout=0.47μF ,CIN=0.47μF ,Temp=+25℃
Technical Note
5/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.13. VOUT - Temp
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =2.5V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp (°C)
Gnd Current (uA)
VIN=2.5V
STBY= 0V
●Reference data BU12TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.5. Output Voltage Fig.6. Line Regulation Fig.7. Circuit Current IGND
Fig.8. VSTBY - ISTBY Fig.9. IOUT - IGND Fig.10. Load Regulation
Fig.11. OCP Threshold Fig.12. STBY Threshold
Fig.14. IGND vs Temp Fig.15. IGND - Temp (STBY)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
1.15
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
Io=0uA
VIN=STBY
Temp=85°
Temp=25°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 2.5V
STBY= 1.5V
0.0
0.5
1.0
1.5
00.5 11.5
STBY V oltage (V )
Output Voltage (V)
VIN= 2.5V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
1.15
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
-40 - 15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN=2.5V
STBY= 1.5V
Io=0.1mA
1.15
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN= 2.5V
STBY= 1.5V
Temp=25°C
Temp=85°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
Temp=25°C
VIN=2.5V
VIN=1.7V
STBY= 1.5V
Technical Note
6/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.16. Load Response
1.20
1.15
1.10
1.25
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.18. Load Response
1.20
1.15
1.10
1.25
Output Voltage (V)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.20. Load Response
1.20
1.10
1.00
1.30
Output Voltage (V)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.21. Load Response
Output Current (mA)
100
200
0
1.30
1.20
1.10
1.40
Output Voltage (V)
IOUT=200mA→0mA
Fig.22. Load Response
1.20
1.15
1.10
1.25
Output Voltage (V)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
●Reference data BU12TD2WNVX (Ta=25 ℃unless otherwise specified.)
Fig.19. Load Response
1.25
1.20
1.15
1.30
Output Voltage (V)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.17. Load Response
IOUT=50mA→0mA
1.25
1.20
1.15
1.30
Output Voltage (V)
Out
p
ut Current
(
mA
)
50
100
0
Fig.23. Load Response
1.20
1.15
1.10
1.25
Out
p
ut Volta
g
e
(
V
)
Out
p
ut Current
(
mA
)
50
100
0
IOUT=100mA→50mA
Technical Note
7/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU12TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.27. Start Up Time
(VIN=STBY) Iout=200mA
Fig.24. Start Up Time
Iout=0mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.25. Start Up Time
Iout=200mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.26. Start Up Time
(VIN=STBY) Iout=0mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.5V
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.5V
Fig.28. Discharge Time
STBY Voltage (V)
1.0
2.0
0.0
1.0
0.0
2.0
Output Voltage (V)
STBY=1.5→0V
Fig.29. VIN Response
1.20
1.19
1.18
1.21
Output Voltage (V)
Input Voltage (V)
3.5
4.5
2.5
VIN=2.5V→3.5V→2.5V
Technical Note
8/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.30. Output Voltage Fig.31. Line Regulation Fig.32. Circuit Current IGND
Fig.33. VSTBY - ISTBY Fig.34. IOUT - IGND Fig.35. Load Regulation
Fig.36. OCP Threshold Fig.37. STBY Threshold Fig.38. VOUT - Temp
Fig.39. IGND vs Temp Fig.40. IGND vs Temp (STBY)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
1.45
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
1.54
1.55
1.41.5 1.61.71.81.9 2 2.1
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA VIN=STBY
Temp=85°C
Temp=25°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 2.5V
STBY= 1.5V
0.0
0.5
1.0
1.5
2.0
00.5 11.5
STBY V oltage (V)
Output Voltage (V)
VIN= 3.8V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
1.45
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
1.54
1.55
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN= 2.5V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=2.5V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp (°C)
Gnd Current (uA)
VIN=2.5V
STBY= 0V
1.45
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
1.54
1.55
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN=2.5V
STBY= 1.5V
Temp=25°C Temp=85°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0 0.10.20.30.40.50.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
Temp=25°C
STBY=1.5V
VIN=2.5V
VIN=2.0V
●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
9/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.47. Load Response
1.50
1.45
1.40
1.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.46. Load Response
IOUT=200mA→0mA
Output Current (mA)
100
200
0
1.60
1.50
1.40
1.70
Out
p
ut Volta
g
e
(
V
)
Fig.48. Load Response
1.55
1.50
1.45
1.60
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→50mA
●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.43. Load Response
1.50
1.45
1.40
1.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.42. Load Response
IOUT=50mA→0mA
1.25
1.20
1.15
1.30
Output Voltage (V)
Output Current (mA)
50
100
0
1.55
1.50
1.45
1.60
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
Fig.41. Load Response
1.50
1.45
1.40
1.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.44. Load Response
IOUT=100mA→0mA
Output Current (mA)
50
100
0
1.55
1.50
1.45
1.60
Out
p
ut Volta
g
e
(
V
)
Fig.45. Load Response
1.50
1.40
1.30
1.60
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Technical Note
10/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.50. Start Up Time
Iout=200mA
STBY Voltage (V)
1.0
2.0
0.0
1.0
0.0
2.0
Output Voltage (V)
STBY=0→1.5V
Fig.51. Start Up Time
(VIN=STBY) Iout=0mA
●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.49. Start Up Time
Iout=0mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.5V
Fig.52. Start Up Time
(VIN=STBY) Iout=200mA
STBY Voltage (V)
2.0
4.0
0.0
1.0
0.0
2.0
Output Voltage (V)
VIN=STBY=0→2.5V
Fig.54. VIN Response
1.50
1.49
1.48
1.51
Output Voltage (V)
Input Voltage (V)
3.5
4.5
2.5
VIN=2.5V→3.5V→2.5V
Fig.53. Discharge Time
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Technical Note
11/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
1.75
1.76
1.77
1.78
1.79
1.80
1.81
1.82
1.83
1.84
1.85
1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
Io=0uA
Temp=85°C
Temp=25°C
VIN=STBY
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 2.8V
STBY= 1.5V
1.75
1.76
1.77
1.78
1.79
1.80
1.81
1.82
1.83
1.84
1.85
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN=2.8V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=3.8V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
1.75
1.76
1.77
1.78
1.79
1.80
1.81
1.82
1.83
1.84
1.85
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN= 2.8V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=2.8V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=2.8V
STBY= 0V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00.10.20.30.40.50.6
Output Current (mA)
Output Voltage (V)
VIN=2.3V
VIN=2.8V
VIN=5.5V
Temp=25°C
STBY=1.5V
●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.55. Output Voltage Fig.56. Line Regulation Fig.57. Circuit Current IGND
Fig.58. VSTBY - ISTBY Fig.59. IOUT - IGND Fig.60. Load Regulation
Fig.61. OCP Threshold Fig.62. STBY Threshold Fig.63. VOUT - Temp
Fig.64. IGND - Temp Fig.65. IGND - Temp (STBY)
Technical Note
12/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.67. Load Response
1.85
1.80
1.75
1.90
Out
p
ut Volta
g
e
(
V
)
IOUT=50mA→0mA
VIN=2.8V
STBY=1.5V
COUT=0.47uF
Fig.68. Load Response
1.80
1.75
1.70
1.85
Out
p
ut Volta
g
e
(
V
)
IOUT=0mA→100mA
Fig.69. Load Response
IOUT=100mA→0mA
VIN=2.8V
STBY=1.5V
COUT=0.47uF
1.85
1.80
1.75
1.90
Out
p
ut Volta
g
e
(
V
)
●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.72. Load Response
1.80
1.70
1.60
1.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.66. Load Response
1.80
1.75
1.70
1.85
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Output Current (mA)
50
100
0
Fig.73. Load Response
IOUT=100mA→50mA
VIN=2.8V
STBY=1.5V
COUT=0.47uF
1.80
1.75
1.70
1.85
Out
p
ut Volta
g
e
(
V
)
Fig.70. Load Response
1.80
1.70
1.60
1.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.71. Load Response
IOUT=200mA→0mA
VIN=2.8V
STBY=1.5V
COUT=0.47uF
Output Current (mA)
100
200
0
1.90
1.80
1.70
2.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
Output Current (mA)
50
100
0
Output Current (mA)
50
100
0
Technical Note
13/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.75. Start Up Time
Iout=200mA
Fig.74. Start Up Time
Iout=0mA
●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.76. Start Up Time
(VIN=STBY) Iout=0mA
Iout=0mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.8V
Fig.77. Start Up Time
(VIN=STBY) Iout=200mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=2.8→0V
Fig.78. Discharge Time
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.79. VIN Response
1.80
1.79
1.78
1.81
Output Voltage (V)
Input Voltage (V)
3.8
4.8
2.8
VIN=2.8V→3.8V→2.8V
STBY Voltage (V)
1.0
2.0
0.0
1.0
0.0
2.0
Output Voltage (V)
STBY=0→1.5V
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Technical Note
14/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.80. Output Voltage Fig.81. Line Regulation Fig.82. Circuit Current IGND
Fig.83. VSTBY - ISTBY Fig.84. IOUT - IGND Fig.85. Load Regulation
Fig.86. OCP Threshold Fig.87. STBY Threshold Fig.88. VOUT - Temp
Fig.89. IGND - Temp Fig.90. IGND - Temp (STBY)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
1.85
1.86
1.87
1.88
1.89
1.90
1.91
1.92
1.93
1.94
1.95
1.81.9 2 2.12.22.32.42.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA
Temp=85°C
Temp=25°C
Temp=-40°C
VIN=STBY
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 3.9V
STBY= 1.5V
1.85
1.86
1.87
1.88
1.89
1.90
1.91
1.92
1.93
1.94
1.95
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =2.9V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=3.9V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
1.85
1.86
1.87
1.88
1.89
1.90
1.91
1.92
1.93
1.94
1.95
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN= 2.9V
STBY=1.5V
Io=100µA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN= 2.9V
STBY= 1.5V
Io=0µA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=2.9V
STBY= 0V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V
)
VIN=5.5V
VIN=2. 4 V
VIN=2.9V
Temp=25°C
STBY=1.5V
●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
15/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.98. Load Response
1.95
1.90
1.85
2.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→50mA
Fig.92. Load Response
1.95
1.90
1.85
2.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→0mA
Fig.94. Load Response
1.95
1.90
1.85
2.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.96. Load Response
2.00
1.90
1.80
2.10
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.93. Load Response
1.90
1.85
1.80
1.95
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.95. Load Response
1.90
1.80
1.70
2.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.97. Load Response
1.90
1.85
1.80
1.95
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.91. Load Response
1.90
1.85
1.80
1.95
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Technical Note
16/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.100. Start Up Time
Iout=200mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.101. Start Up Time
(VIN=STBY) Iout=0mA
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.9V
Fig.103. Discharge Time
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.104. VIN Response
1.90
1.89
1.88
1.91
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
3.9
4.9
2.9
VIN=2.9V→3.9V→2.9V
Fig.99. Start Up Time
Iout=0mA
STBY=0→1.5V
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
1.0
0.0
2.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→2.9V
Fig.102. Start Up Time
(VIN=STBY) Iout=200mA
Technical Note
17/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.114. VOUT - Temp
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=- 40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
2.4 2.5 2.6 2.7 2.8 2.9 3 3.1
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA
Temp=85°C
Temp=25°C
Temp=-40°C
VIN=STBY
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 3.5V
STBY= 1.5V
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN=3.5V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=3.5V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN= 3.5V
STBY=1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =3.5V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=3.5V
STBY= 0V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.0V
VIN=3. 5 V
STBY=1.5V
Temp=25°C
●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.105. Output Voltage Fig.106. Line Regulation Fig.107. Circuit Current IGND
Fig.108. VSTBY - ISTBY Fig.109. IOUT - IGND Fig.110. Load Regulation
Fig.111. Dropout Voltage Fig.112. OCP Threshold Fig.113. STBY Threshold
Fig.115. IGND - Temp Fig.116. IGND - Temp (STBY)
Technical Note
18/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.117. Load Response
2.50
2.45
2.40
2.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.118. Load Response
Output Current (mA)
50
100
0
2.65
2.50
2.45
2.70
Out
p
ut Volta
g
e
(
V
)
IOUT=50mA→0mA
Fig.119. Load Response
2.50
2.45
2.40
2.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.120. Load Response
2.55
2.50
2.45
2.60
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=100mA→0mA
Fig.121. Load Response
2.50
2.40
2.30
2.60
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.122. Load Response
Output Current (mA)
100
200
0
2.60
2.50
2.40
2.70
Out
p
ut Volta
g
e
(
V
)
IOUT=200mA→0mA
●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.124. Load Response
2.55
2.50
2.45
2.0
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
Fig.123. Load Response
2.50
2.45
2.40
2.55
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Technical Note
19/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.127. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.5V
Fig.128. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.5V
Fig.125. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.126. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.130. VIN Response
VIN=3.5V→4.5V→3.5V
2.50
2.49
2.48
2.51
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
4.5
5.5
3.5
Fig.129. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY=1.5→0V
STBY Voltage (V)
1.0
2.0
0
●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
20/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.140. VOUT - Temp
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=- 40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
2.55
2.56
2.57
2.58
2.59
2.60
2.61
2.62
2.63
2.64
2.65
2.5 2.6 2.7 2.8 2.9 3 3.1 3.2
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA VIN=STBY
Temp=85°C
Temp=25°C
Temp=-40°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 3.6V
STBY= 1.5V
2.55
2.56
2.57
2.58
2.59
2.60
2.61
2.62
2.63
2.64
2.65
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =3.6V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.1V
VIN=3.6V
Temp=25°C
STBY=1.5V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=3.6V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
2.55
2.56
2.57
2.58
2.59
2.60
2.61
2.62
2.63
2.64
2.65
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN =3.6V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =3.6V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN= 3.6V
STBY= 0V
●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.131. Output Voltage Fig.132. Line Regulation Fig.133. Circuit Current IGND
Fig.134. VSTBY - ISTBY Fig.135. IOUT - IGND Fig.136. Load Regulation
Fig.137. Dropout Voltage Fig.138. OCP Threshold Fig.139. STBY Threshold
Fig.141. IGND - Temp Fig.142. IGND - Temp (STBY)
Technical Note
21/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.143. Load Response
2.60
2.55
2.50
2.65
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.145. Load Response
2.60
2.55
2.50
2.65
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.147. Load Response
2.60
2.50
2.40
2.70
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.149. Load Response
2.60
2.55
2.50
2.65
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.144. Load Response
2.65
2.60
2.55
2.70
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→0mA
Fig.146. Load Response
2.65
2.60
2.55
2.70
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.148. Load Response
2.70
2.60
2.50
2.80
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.150. Load Response
2.61
2.60
2.59
2.62
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→50mA
Technical Note
22/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.151. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.153. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.6V
Fig.154. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.6V
Fig.155. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.156. VIN Response
2.65
2.60
2.55
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
4.6
5.6
3.6
VIN=3.6V→4.6V→3.6V
Fig.152. Start Up Time
Iout=200mA
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
2.0
0.0
4.0
Output Voltage (V)
Technical Note
23/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=- 40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
2.65
2.66
2.67
2.68
2.69
2.70
2.71
2.72
2.73
2.74
2.75
2.62.72.82.9 3 3.13.23.3
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA VIN=STBY
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 3.7V
STBY= 1.5V
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=3.7V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
2.65
2.66
2.67
2.68
2.69
2.70
2.71
2.72
2.73
2.74
2.75
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN= 3.7V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =3.7V
STBY= 1.5V
Io=0.1mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=3.7V
STBY= 0V
2.65
2.66
2.67
2.68
2.69
2.70
2.71
2.72
2.73
2.74
2.75
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =3.7V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.1V
VIN=3. 6 V
Tem p=25°C
STBY=1.5V
●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.157. Output Voltage Fig.158. Line Regulation Fig.159. Circuit Current IGND
Fig.160. VSTBY - ISTBY Fig.161. IOUT - IGND Fig.162. Load Regulation
Fig.163. Dropout Voltage Fig.164. OCP Threshold Fig.165. STBY Threshold
Fig.166. VOUT - Temp Fig.167. IGND - Temp Fig.168. IGND - Temp (STBY)
Technical Note
24/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.169. Load Response
2.70
2.65
2.60
2.75
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.170. Load Response
2.75
2.70
2.65
2.80
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→0mA
Fig.171. Load Response
2.70
2.65
2.60
2.75
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.172. Load Response
2.75
2.70
2.65
2.80
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.173. Load Response
2.70
2.60
2.50
2.80
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.174. Load Response
2.80
2.70
2.60
2.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.175. Load Response
2.70
2.65
2.60
2.75
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.176. Load Response
2.75
2.70
2.65
2.80
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
25/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.177. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.178. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.179. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.7V
Fig.180. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.7V
Fig.181. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.182. VIN Response
2.70
2.69
2.68
2.71
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
4.7
5.7
3.7
Technical Note
26/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.192. VOUT - Temp
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =3.8V
STBY=0V
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =3.8V
STBY= 1.5V
Io=0mA
2.75
2.76
2.77
2.78
2.79
2.80
2.81
2.82
2.83
2.84
2.85
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN =3.8V
STBY=1.5V
Io=0.1mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
00.5 11.5
STBY V oltage (V)
Output Voltage (V)
VIN= 3.8V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
2.75
2.76
2.77
2.78
2.79
2.80
2.81
2.82
2.83
2.84
2.85
2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
Input Voltage (V)
Output Voltage (V)
Temp=25°C VIN=STBY
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
Io=0uA VIN=STBY
Temp=85°C
Temp=25°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=- 40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 3.8V
STBY= 1.5V
2.75
2.76
2.77
2.78
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =3.8V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V
)
VIN=5.5V
VIN=3. 3 V
VIN=3.8V
Temp=25°C
STBY=1.5V
●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.183. Output Voltage Fig.184. Line Regulation Fig.185. Circuit Current IGND
Fig.186. VSTBY - ISTBY Fig.187. IOUT - IGND Fig.188. Load Regulation
Fig.189. Dropout Voltage Fig.190. OCP Threshold Fig.191. STBY Threshold
Fig.193. IGND - Temp Fig.194. IGND - Temp (STBY)
Technical Note
27/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.201. Load Response
2.80
2.75
2.70
2.85
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.202. Load Response
2.85
2.80
2.75
2.90
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
Fig.196. Load Response
2.85
2.80
2.75
2.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
Fig.198. Load Response
2.85
2.80
2.75
2.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.200. Load Response
2.90
2.80
2.70
3.00
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.195. Load Response
2.80
2.75
2.70
2.85
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.197. Load Response
2.80
2.75
2.70
2.85
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.199. Load Response
2.80
2.70
2.60
2.90
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Technical Note
28/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.203. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.204. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.205. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.8V
Fig.206. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→3.8V
Fig.207. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.208. VIN Response
2.80
2.79
2.78
2.81
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
4.8
5.8
3.8
VIN=3.8→4.8V→3.8V
●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
29/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.212. VSTBY - ISTBY Fig.213. IOUT - IGND Fig.214. Load Regulation
Fig.215. Dropout Voltage Fig.216. OCP Threshold Fig.217. STBY Threshold
Fig.218. VOUT - Temp Fig.219. IGND - Temp Fig.220. IGND - Temp (STBY)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
3.03
3.04
3.05
2.9 3 3.13.2 3.33.4 3.53.6
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io= 200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
Io=0uA VIN=STBY
Temp=85°C
Temp=25°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 4.0V
STBY= 1.5V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.5 11.5
STBY V oltage (V)
Output Voltage (V)
VIN= 4.0V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
3.03
3.04
3.05
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN=4.0V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN= 4.0V
STBY= 1.5V
Io=0mA
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
3.03
3.04
3.05
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN= 4.0V
STBY= 1.5V
Temp=25°C
Temp=-40°C Temp=85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=25°C
Temp=-40°C
Temp=85°C
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN =4.0V
STBY= 0V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.10.20.30.40.50.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.5V
VIN=4.0V
Temp=25°C
STBY= 1.5V
●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.209. Output Voltage Fig.210. Line Regulation Fig.211. Circuit Current IGND
Technical Note
30/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.221. Load Response
3.00
2.95
2.90
3.05
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.222. Load Response
3.05
3.00
2.95
3.10
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→0mA
Fig.223. Load Response
3.00
2.95
2.90
3.05
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.224. Load Response
3.05
3.00
2.95
3.10
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.225. Load Response
3.00
2.90
2.80
3.10
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.226. Load Response
3.10
3.00
2.90
3.20
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.227. Load Response
3.00
2.95
2.90
3.05
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.228. Load Response
3.05
3.00
2.95
3.10
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
31/41
BU□□TD2WNVX series
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© 2011 ROHM Co., Ltd. All rights reserved.
Fig.229. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.230. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.231. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.0V
Fig.232. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.0V
Fig.233. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
STBY=1.5→0V
●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.234. VIN Response
3.00
2.99
2.98
3.01
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
5.0
6.0
4.0
VIN=4.0→5.0V→4.0V
Technical Note
32/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.244. VOUT - Temp
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY 3.05
3.06
3.07
3.08
3.09
3.10
3.11
3.12
3.13
3.14
3.15
3 3.1 3.2 3.3 3.4 3.5 3.6 3.7
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Gnd Current (uA)
IO=0uA VIN=STBY
Temp=85°
Temp=25°
Temp=-40°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 4.1V
STBY= 1.5V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.6V
VIN=4.1V
Temp=25°C
STBY=1.5V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.5 1 1.5
STBY Voltage (V)
Output Voltage (V)
VIN=4.1V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
3.05
3.06
3.07
3.08
3.09
3.10
3.11
3.12
3.13
3.14
3.15
-40 -15 10 35 60 85
Temp (°C)
Output Voltage (V)
VIN=4.1V
STBY=1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp (°C)
Gnd Current (uA)
VIN=4.1V
STBY=1.5V
Io=0mA
3.05
3.07
3.09
3.11
3.13
3.15
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =4.1V
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN= 4.1V
STBY= 0V
●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.235. Output Voltage Fig.236. Line Regulation Fig.237. Circuit Current IGND
Fig.238. VSTBY - ISTBY Fig.239. IOUT - IGND Fig.240. Load Regulation
Fig.241. Dropout Voltage Fig.242. OCP Threshold Fig.243. STBY Threshold
Fig.245. IGND - Temp Fig.246. IGND - Temp (STBY)
Technical Note
33/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.247. Load Response
3.10
3.05
3.00
3.15
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.249. Load Response
3.10
3.05
3.00
3.15
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.250. Load Response
3.15
3.10
3.05
3.20
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.253. Load Response
3.10
3.05
3.00
3.15
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.248. Load Response
3.15
3.10
3.05
3.20
Out
p
ut Volta
g
e
(
V
)
IOUT=50mA→0mA
Output Current (mA)
50
100
0
Fig.252. Load Response
3.20
3.10
3.00
3.30
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.251. Load Response
3.10
3.00
2.90
3.20
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Fig.254. Load Response
3.15
3.10
3.05
3.20
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
Technical Note
34/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.255. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.256. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.257. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.1V
Fig.258. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.1V
Fig.259. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.260. VIN Response
3.10
3.09
3.08
3.11
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
5.1
6.1
4.1
VIN=4.1V→5.1V→4.1V
●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
35/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.261. Output Voltage Fig.262. Line Regulation Fig.263. Circuit Current IGND
Fig.264. VSTBY - ISTBY Fig.265. IOUT - IGND Fig.266. Load Regulation
Fig.267. Dropout Voltage Fig.268. OCP Threshold Fig.269. STBY Threshold
Fig.270. VOUT - Temp Fig.271. IGND - Temp Fig.272. IGND - Temp (STBY)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.511.522.533.544.555.5
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io= 100uA
Io=50mA
Io=200mA
VIN=STBY
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9
Input Voltage (V)
Output Voltage (V)
Temp=25°C
Io=0uA
Io=100uA
Io=50mA
Io=200mA
VIN=STBY
0
20
40
60
80
100
00.511.522.533.544.555.5
Input Voltage (V)
Gnd Current (uA)
Io=0uA VIN= STBY
Temp=85°C
Temp=25°C
Temp=-40°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
00.511.522.5 33.544.555.5
Input Voltage (V)
STBY Pin Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
0
20
40
60
80
100
0 0.05 0.1 0.15 0.2
Output Current (A)
Gnd Current (uA)
Temp=-40°C
Temp=25°C
Temp=85°C
VIN= 4.3V
STBY= 1.5V
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
0 0.1 0.2 0.3 0.4 0.5 0.6
Output Current (A)
Output Voltage (V)
VIN=5.5V
VIN=3.8V
VIN=4.3V
Temp=25°C
STBY= 1.5V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00.5 11.5
STBY V oltage (V )
Output Voltage (V)
VIN= 4.3V
Io=0mA
Temp=-40°C
Temp=25°C
Temp=85°C
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
-40 -15 10 35 60 85
Temp ( °C)
Output Voltage (V)
VIN=4.3V
STBY= 1.5V
Io=0.1mA
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Temp ( °C)
Gnd Current (uA)
VIN=4.3V
STBY= 1.5V
Io=0mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40 -15 10 35 60 85
Temp (°C)
Gnd Current (uA)
VIN=4.3V
STBY= 0V
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
0 0.05 0.1 0.15 0.2
Output Current (A)
Output Voltage (V)
VIN =4.3V
STBY= 1.5V
Temp=85°C
Temp=25°C
Temp=-40°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 0.05 0.1 0.15 0.2
Output Current (A)
Dropout Voltage (V)
VIN = 0.98 x VOU T
STBY= 1.5V
Temp=-40°C
Temp=25°C
Temp=85°C
●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)
Technical Note
36/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.274. Load Response
3.35
3.30
3.25
3.40
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→0mA
Fig.276. Load Response
3.35
3.30
3.25
3.40
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=100mA→0mA
Fig.278. Load Response
3.40
3.30
3.20
3.50
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=200mA→0mA
Fig.280. Load Response
3.35
3.30
3.25
3.40
Out
p
ut Volta
g
e
(
V
)
IOUT=100mA→50mA
Output Current (mA)
50
100
0
Fig.273. Load Response
3.30
3.25
3.20
3.35
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→50mA
Fig.275. Load Response
3.30
3.25
3.20
3.35
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=0mA→100mA
Fig.279. Load Response
3.30
3.25
3.20
3.35
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
50
100
0
IOUT=50mA→100mA
Fig.277. Load Response
3.30
3.20
3.10
3.40
Out
p
ut Volta
g
e
(
V
)
Output Current (mA)
100
200
0
IOUT=0mA→200mA
Technical Note
37/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig.281. Start Up Time
Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.282. Start Up Time
Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=0→1.5V
Fig.283. Start Up Time
(VIN=STBY) Iout=0mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.3 V
Fig.284. Start Up Time
(VIN=STBY) Iout=200mA
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
2.0
4.0
0.0
VIN=STBY=0→4.3V
●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)
Fig.285. Discharge Time
2.0
0.0
4.0
Output Voltage (V)
STBY Voltage (V)
1.0
2.0
0.0
STBY=1.5→0V
Fig.286. VIN Response
3.30
3.29
3.28
3.31
Out
p
ut Volta
g
e
(
V
)
Input Voltage (V)
5.3
6.3
4.3
VIN=4.3V→5.3V→5.3V
Technical Note
38/41
BU□□TD2WNVX series
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© 2011 ROHM Co., Ltd. All rights reserved.
0
0.1
0.2
0.3
0.4
0.5
0.6
0 25 50 75 100 125
Ta [℃]
Pd [W]
0.56W
85
0.39W
About power dissipation (Pd)
As for power dissipation, an approximate estimate of the heat reduction characteristics and internal power consumption of
IC are shown, so please use these for reference. Since power dissipation changes substantially depending on the
implementation conditions (board size, board thickness, metal wiring rate, number of layers and through holes, etc.), it is
recommended to measure Pd on a set board. Exceeding the power dissipation of IC may lead to deterioration of the original
IC performance, such as causing operation of the thermal shutdown circuit or reduction in current capability. Therefore, be
sure to prepare sufficient margin within power dissipation for usage.
Calculation of the maximum internal power consumption of IC (PMAX)
PMAX=(VIN-VOUT)×IOUT(MAX.) (VIN: Input voltage VOUT: Output voltage IOUT(MAX): Maximum output current)
○Measurement conditions
Standard ROHM Board Evaluation Board 1
Layout of Board for
Measurement
IC Implementation
Position
Top Layer (Top View) Top Layer (Top View)
Bottom Layer (Top View) Bottom Layer (Top View)
Measurement State With board implemented (Wind speed 0 m/s) With board implemented (Wind speed 0 m/s)
Board Material Glass epoxy resin (Double-side board) Glass epoxy resin (Double-side board)
Board Size 70 mm x 70 mm x 1.6 mm 40 mm x 40 mm x 1.6 mm
Wiring
Rate
Top layer Metal (GND) wiring rate: Approx. 0% Metal (GND) wiring rate: Approx. 50%
Bottom layer Metal (GND) wiring rate: Approx. 50% Metal (GND) wiring rate: Approx. 50%
Through Hole Diameter 0.5mm x 6 holes Diameter 0.5mm x 25 holes
Power Dissipation 0.56W 0.39W
Thermal Resistance θja=178.6°C/W θja=256.4℃/W
* Please design the margin so that PMAX
becomes is than Pd (PMAXPd) within the
usage temperature range.
Figure 287. SSON004X1010 Power dissipation heat reduction characteristics (Reference)
Standard ROHM Board
Evaluation Board 1
Technical Note
39/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Device Name and Marking
Symbol Description
Marking
a
□□ Output
Voltage
12 1.2V typ. B
15 1.5V typ. C
18 1.8V typ. D
19 1.9V typ. F
25 2.5V typ. H
26 2.6V typ. J
27 2.7V typ. K
28 2.8V typ. L
30 3.0V typ. P
31 3.1V typ. Q
33 3.3V typ. U
Fig.288. Package dimension and Marking
Lot No.
Marking
1 VOUT 2 GND
3 STBY
4 VIN
Heatshink is
connected to GND
(Unit:mm)
a
Device Name： BU□□TD2WNVX
Technical Note
40/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Fig. 289. Example of bypass diode connection
Reverse current
VIN
GND
STBY
OUT
●Notes for use
1) About absolute maximum rating
Breakage may occur when absolute maximum ratings such as applied voltage and operating temperature range are
exceeded. Short mode or open mode cannot be specified at occurrence of a break, so please prepare physical safety
measures (e.g., fuse) if such special mode in which the absolute maximum rating is exceeded can be assumed.
2) About GND potential
Please be sure that the potential of the GND terminal is the lowest in any operating condition.
3) About thermal design
Please provide thermal design with sufficient margin, taking power dissipation (Pd) in actual usage conditions into
consideration.
4) About short between pins and misattachment
Please be careful regarding the IC direction and misalignment at attachment onto a printed circuit board. Misattachment
may cause a break of IC. Short caused by foreign matter between outputs, output and power supply, or GNDs may also
lead to a break.
5) About operation in a strong electromagnetic field
Please note that usage in a strong electromagnetic field may cause malfunction.
6) About common impedance
Please give due consideration to wiring of the power source and GND by reducing common-mode ripple or making ripple
as small as possible (e.g., making the wiring as thick and short as possible, or reducing ripple by LC), etc.
7) About STBY terminal voltage
Set STBY terminal voltage to 0.3 V or less to put each channel into a standby state and to 1.2 V or more to put each
channel into an operating state. Do not fix STBY terminal voltage to 0.3 V or more and 1.2 V or less or do not lengthen
the transition time. This may cause malfunction or failure.
When shorting the VIN terminal and STBY terminal for usage, the status will be “STBY=VIN=LOW” at turning the power
OFF, and discharge of the VOUT terminal cannot operate, which means voltage may remain for a certain time in the
VOUT terminal. Since turning the power ON again in this state may cause overshoot, turn the power ON for use after the
VOUT terminal is completely discharged.
8) About overcurrent protection circuit
Output has a built-in overcurrent protection circuit, which prevents IC break at load short. Note that this protection circuit
is effective for prevention of breaks due to unexpected accidents. Please avoid usage by which the protection circuit
operates continuously.
9) About thermal shutdown
Output is OFF when the thermal circuit operates since a temperature protection circuit is built in to prevent thermal
breakdown. However, it recovers when the temperature returns to a certain temperature. The thermal circuit operates at
emergency such as overheating of IC. Since it is prepared to prevent IC breakdown, please do not use it in a state in
which protection works.
About reverse current
For applications on which reverse current is assumed to flow into IC,
it is recommended to prepare a path to let the current out by
putting a bypass diode between the VIN-VOUT terminals.
About testing on a set board
When connecting a capacitor to a terminal with low impedance for testing on a set board, please be sure to discharge for
each process since IC may be stressed. As a countermeasure against static electricity, prepare grounding in the assembly
process and take sufficient care in transportation and storage. In addition, when connecting a capacitor to a jig in a testing
process, please do so after turning the power OFF and remove it after turning the power OFF.
Technical Note
41/41
BU□□TD2WNVX series
www.rohm.com 2011.01 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Ordering part number
B D 1 0 T D 2 W N V X - T L
Part No. Output Voltage
10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
1J : 1.85V
19 : 1.9V
20 : 2.0V
21 : 2.1V
23 : 2.3V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
2J : 2.85V
29 : 2.9V
30 : 3.0V
31 : 3.1V
32 : 3.2V
33 : 3.3V
34 : 3.4V
Line up
Package
NVX : SSON004X1010
Packaging and forming specification
TL: Embossed tape and reel
SSON004X1010
(Unit : mm
)
1.0±0.1
1.0±0.1
1PIN MARK
0.6MAX
0.02+0.03
−0.02
S
0.05
(0.12)
0.65±0.05
0.48±0.05
0.07±0.1
0.25±0.05
0.25±0.1
1
45º
4
2
3
3-C0.18
R0.05
0.48±0.05
0.32±0.1
∗ Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed
The direction is the 1pin of product is at the lower left when you hold
reel on the left hand and you pull out the tape on the left hand
5000pcs
TL
()
Direction of feed
Reel 1pin
R1120
A
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Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specied herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
