R1161x SERIES
3-MODE 300mA LDO REGULATOR
NO.EA-106-130415
1
OUTLINE
The R1161x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply
current, and low ON-resist ance. Each of these voltag e regulator ICs consist s of a voltage refe rence unit, an error
amplifier, resistors for setting output voltage, a current limit circuit, and a chip en able circuit.
These ICs perform with low dropout voltage and a chip enable function. To prevent the destruction by over
current, current limit circuit is included. The R1161x Series have 3-mode. One is standby mode with CE or
standby control pin. Standby mode realizes ultra small consumption current off mode. Other two modes are
realized with ECO pin. Fast Transient Mode (FT mode) and Low Power Mode (LP mode) are alternative with
ECO pin. Consumption current is reduced at Low Power Mode compared with Fast Transient Mode. Output
voltage is maintained between FT mo de and LP mode.
The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are
SOT-23-5, S ON-6 (Non-promotion), and HSON-6 (Non-promotion), high density mounting of the ICs on boards
is possible.
FEATURES
• Supply Current..................................................Typ. 3.5μA (Low Power Mode, VOUT<1.6V),
Typ. 80μA (Fast Transient Mode, VOUT<1.8V)
Typ. 60μA (Fast Transient Mode, VOUT ≥ 1.8V)
• Standby Mode...................................................Typ. 0.1μA
• Dropout Voltage ................................................Typ. 0.48V (IOUT=300mA Output Voltage=1.0V Type)
Typ. 0.31V (IOUT=300mA Output Voltage=1.5V Type)
Typ. 0.23V (IOUT=300mA Output Voltage=3.0V Type)
• Ripple Rejection................................................Typ. 65dB (f=1kHz, FT Mode)
• Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/°C
• Line Regulation.................................................Typ. 0.01%/V (at Fast Transient Mode)
• Output Voltage Accuracy...................................±2.0%(±3.0% at LP Mode)
• Packages .........................................................SOT-23-5, SON-6 (Non-promotion),
HSON-6 (Non-promotion)
• Output Voltage ..................................................0.8V to 3.3V (0.1V steps)
(For other volt ages, please refer to MARK INFORMATIONS.)
• Input Voltage.....................................................Min. 1.40V (VOUT ≥ 1.0V)
Min. 1.45V (VOUT<1.0V)
• Built-in fold-back protection circuit....................Typ. 50mA (Current at short mode)
• External Capacitors...........................................CIN = COUT = Tantalum 1.0μF (VOUT<1.0V)
C
IN = COUT =Ceramic 1.0μF (VOUT ≥ 1.0V)
APPLICATIONS
• Precision Voltage References.
• Power source for electrical appliances such as cameras, VCRs and hand-held communication equipment.
• Power source for battery-powered equipment.
R1161x
2
BLOCK DIAGRAM
R1161xxxxA R1161xxxxB
V
DD
GND
V
OUT
ECO
Vref
Current
Limit
CE
V
DD
CE GND
V
OUT
ECO
Vref
Current
Limit
R1161xxxxD
VDD
CE GND
VOUT
ECO
Vref
Current
Limit
R1161x
3
SELECTION GUIDE
The output voltage, chip enable polarity, auto discharge function, and package, etc. for the ICs can be
selected at the user’s request.
Product Name Package Quantity per Reel Pb Free Halogen Free
R1161Nxx1∗-TR-FE SOT-23-5 3,000 pcs Yes Yes
R1161Dxx1∗-TR-FE SON-6
(Non-promotion) 3,000 pcs Yes Yes
R1161Dxx2∗-TR-FE HSON-6
(Non-promotion) 3,000 pcs Yes Yes
xx : The output voltage can be desig nated i n the rang e from 0.8V(08 ) to 3.3V(33 ) in 0.1V steps.
(For other voltages, please refer to MARK INFORMA TIONS.)
∗ : CE pin polarity and auto discharge function at off state are optio ns as follows.
(A) "L" active type, without auto discharge function at off state
(B) "H" active type, without auto discharge fun cti on at off state
(D) "H" active type, with auto discharge function a t off state
The products scheduled to be discontinued : "Non-promotion"
These products will be discontinued in the future. We advise you to select other products.
R1161x
4
PIN CONFIGURATIONS
SOT-23-5 SON-6 HSON-6
1 2 3
4
5
(m ark side)
Top View Bottom View
13
6
2
54
31
4
2
56
Top View Bottom View
64
1
5
23
46
3
5
21
PIN DESCRIPTIONS
• SOT-23-5
Pin No. Symbol Description
1 VDD Input Pin
2 GND Ground Pin
3 CE or CE Chip Enable Pin
4 ECO MODE alternative pin
5 VOUT Output pin
• SON-6 (Non-promotion), HSON-6 (Non-promotion)
Pin No. Symbol Description
1 VDD Input Pin
2 NC No Connection
3 VOUT Output pin
4 ECO MODE alternative pin
5 GND Ground Pin
6 CE or CE Chip Enable Pin
∗) Tab and tab suspension leads are GND level. (Th ey are connected to the reverse side of the IC.)
The tab is better to be connected to the GND, but lea ving it open is also acceptable.
The tab suspension leads should be open and do not connect to other wires or land patterns.
R1161x
5
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN Input Voltage 6.5 V
VECO Input Voltage (ECO Pin) -0.3 ~ 6.5 V
VCE Input Voltage ( CE /CE Pin) -0.3 ~ 6.5 V
VOUT Output Voltage -0.3 ~ VIN+0.3 V
IOUT Output Current 350 mA
PD Power Dissipation (SOT 23-5)* 420
PD Power Dissipation (SON-6) (Non-promotion)* 500
PD Power Dissipation (HSON-6) (Non-promotion)* 900
mW
Topt Operating Temperature Range -40 ~ 85 °C
Tstg Storage Temperatu re Range -55 ~ 125 °C
* ) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages an d may degrade the life time and safety for both device and sy stem using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment sho uld be designed that the mounted semicon ductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor de vices may receive serious damage when they continue
to operate over the recomm ended operating conditions.
R1161x
6
ELECTRICAL CHARACTERISTICS
• R1161xxxxA Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
Output Voltage (FT Mode) VIN=Set VOUT+1V, VECO=VIN
1μA ≤ IOUT ≤ 30mA Note 1 ×0.98
(-30mV) ×1.02
(30mV) V
VOUT Output Voltage (LP Mode) VIN=Set VOUT+1V, VECO=GND
1μA ≤ IOUT ≤ 30mA Note 2 ×0.97
(-45mV) ×1.03
(45mV) V
IOUT Output Current VIN−VOUT=1.0V 300 mA
ΔVOUT/
ΔIOUT Load Regulation (FT Mode) VIN=Set VOUT+1V, VECO=VIN
1mA ≤ IOUT ≤ 300mA 40 70 mV
ΔVOUT/
ΔIOUT Load Regulation (LP Mode) VIN=Set VOUT+1V, VECO=GND
1mA ≤ IOUT ≤ 100mA 15 30 mV
VDIF Dropout Voltage
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
VIN=Set VOUT+1V
VECO=VIN, VOUT<1.8V 80 111
μA
ISS1 Supply Current (FT Mode) VIN=Set VOUT+1V
VECO=VIN, VOUT ≥ 1.8V 60 90
μA
VIN=Set VOUT+1V,
VOUT<1.6V, VECO=GND 3.5 8.0
μA
ISS2 Supply Current (LP Mode) VIN=Set VOUT+1V
VOUT ≥ 1.6V, VECO=GND 4.5 9.0
μA
Istandby Supply Current (Standby) VIN=VCE=Set VOUT+1V,
VECO=GND or V IN 0.1 1.0
μA
ΔVOUT/
ΔVIN Line Regulation (FT Mode) Set VOUT+0.5V ≤ VIN ≤ 6.0V
IOUT=30mA, VECO=VIN
Set VOUT ≤ 0.9V: 1.4V ≤ VIN ≤ 6.0V 0.01 0.15 %/V
ΔVOUT/
ΔVIN Line Regulation (LP Mode) Set VOUT + 0.5V ≤ VIN ≤ 6.0V
IOUT=30mA, VECO=GND
Set VOUT ≤ 0.9V:1.4V ≤ VIN ≤ 6.0V 0.05 0.20 %/V
RR Ripple Reje ction (FT Mode) f = 1kHz, Ripple 0.2Vp-p
VIN=Set VOUT + 1V
IOUT=30mA, VECO=VIN 65 dB
VIN Input Voltage 1.4 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=30mA
−40°C ≤ Topt ≤ 85°C ±100 ppm
/°C
Ilim Short Current Limit VOUT=0V 50 mA
RPU CE Pull-up Resistance 1.87 5.00 12.00 MΩ
RPD ECO Pull-down Resistance 1.87 5.00 12.00 MΩ
VCEH CE , ECO Input Voltage “H” 1.0 6.0 V
VCEL CE , ECO Input Voltage “L” 0.0 0.3 V
VEN Output Noise BW=10Hz to 100kHz 30
μ
Vrms
Note1: ±30mV tolerance for VOUT ≤ 1.5V.
Note2: ±45mV tolerance for VOUT ≤ 1.5V.
R1161x
7
• R1161xxxxB/D Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
Output Voltage (FT Mode) VIN=Set VOUT+1V,VECO=VIN
1μA ≤ IOUT ≤ 30mA Note 1 ×0.98
(−30mV) ×1.02
(30mV) V
VOUT Output Voltage (LP Mode) VIN=Set VOUT+1V,VECO=GND
1μA ≤ IOUT ≤ 30mA Note 2 ×0.97
(−45mV) ×1.03
(45mV) V
IOUT Output Current VIN-VOUT=1.0V 300 mA
ΔVOUT/
ΔIOUT Load Regulation (FT Mode) VIN=Set VOUT+1V,VECO=VIN
1mA ≤ IOUT ≤ 300mA 40 70 mV
ΔVOUT/
ΔIOUT Load Regulation (LP Mode) VIN=Set VOUT+1V,VECO=GND
1mA ≤ IOUT ≤ 100mA 15 30 mV
VDIF Dropout Voltage
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
VIN=Set VOUT+1V
VECO=VIN,VOUT<1.8V 80 111
μA
ISS1 Supply Current (FT Mode) VIN=Set VOUT+1V
VECO=VIN, VOUT ≥ 1.8V 60 90
μA
VIN=Set VOUT+1V,
VOUT<1.6V, VECO=GND 3.5 8.0
μA
ISS2 Supply Current (LP Mode) VIN=Set VOUT+1V,
VOUT ≥ 1.6V,VECO=GND 4.5 9.0
μA
Istandby Supply Current (Standby) VIN=Set VOUT+1V,
VCE=GND,VECO=GND or VIN 0.1 1.0
μA
ΔVOUT/
ΔVIN Line Regulation (FT Mode) Set VOUT+0.5V ≤ VIN ≤ 6.0V
IOUT=30mA, VECO=VIN
Set VOUT ≤ 0.9V: 1.4V ≤ VIN ≤ 6.0V 0.01 0.15 %/V
ΔVOUT/
ΔVIN Line Regulation (LP Mode) Set VOUT+0.5V ≤ VIN ≤ 6.0V
IOUT=30mA, VECO=GND
Set VOUT ≤ 0.9V: 1.4V ≤ VIN ≤ 6.0V 0.05 0.20 %/V
RR Ripple Rejection (FT Mo de) f=1kHz, Ripple 0.2Vp-p
VIN=Set VOUT+1V
IOUT=30mA, VECO=VIN 65 dB
VIN Input Voltage 1.4 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=30mA
-40°C ≤ Topt ≤ 85°C ±100 ppm
/°C
Ilim Short Current Limit VOUT=0V 50 mA
RPDC CE Pull-down Resistance 1.87 5.00 12.00 MΩ
RPDE ECO Pull-down Resistance 1.87 5.00 12.00 MΩ
VCEH CE, ECO Input Voltage “H” 1.0 6.0 V
VCEL CE, ECO Input Voltage “L” 0.0 0.3 V
VEN Output Noise BW=10Hz to 100kHz 30
μ
Vrms
RLOW Nch On Resistance for auto
discharge (applied to D
version only) VCE=0V 60 Ω
Note1: ±30mV tolerance for VOUT ≤ 1.5V.
Note2: ±45mV tolerance for VOUT ≤ 1.5V.
R1161x
8
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt=25°C
Dropout Voltage VDIF (V)
VDIF (ECO=H) VDIF (ECO=L)
Output Voltage VOUT (V) Condition Typ. Max. Typ. Max.
0.8=VOUT 0.620 0.850 0.670 0.900
0.9=VOUT 0.550 0.780 0.590 0.800
1.0 ≤ VOUT <1.5 0.480 0.700 0.510 0.750
1.5 ≤ VOUT < 2.6 0.310 0.450 0.320 0.480
2.6 ≤ VOUT ≤ 3.3
IOUT=300mA
0.230 0.350 0.240 0.375
TEST CIRCUITS
C1 C2
V
IN
I
OUT
V
DD
OUT
CE
GND
R1161xxxxx
SERIES A
ECO
Fig.1 Output Voltage vs. Output Current Test Circuit
C1 I
OUT
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
V
V
OUT
C2 ↓
Fig.2 Output Voltage vs. Input Voltage Test Circuit
R1161x
9
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
A
V
IN
Fig.3 Supply Current vs. Input Voltage Test Circuit
C1 I
OUT
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
V
V
OUT
C2
↓
Fig.4 Output Voltage vs. Temperature Test Circuit
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
A
C2
A
Fig.5 Supply Current vs. Temperature Test Circuit
C1 IOUT
VDD OUT
CE
GND
R1161xxxxx
SERIES
ECO
V
VOUT
C2 ↓
V
VDIF
Fig. 6 Dropout Voltage vs. Output Cur rent/ Set Output Volt age Test Circuit
R1161x
10
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
↓
Pulse
Generator
Fig. 7 Ripple Rejection Test Circuit
VDD OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
↓
Pulse
Generator
Fig.8 Input Transient Response Test Circuit
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
↓
C1
↓
Fig.9 Load Transient Response Test Circuit
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
Function
Generator
Fig.10 Turn on S peed with CE pin Test Circuit
R1161x
11
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2 ↓
Pulse
Generator
Fig.11 MODE Transient Response Test Circuit
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
S.A
Spectrum
A
nalyzer
SR
C1=Ceramic 1.0μF
C2=Ceramic Ca
p
acito
r
C2
Fig.12 Output Noise Test Circuit(IOUT vs. ESR)
TYPICAL APPLICATION
C1
V
DD
OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
(External Components)
Output Capacitor; 1.0μF or more capacity ceramic Type (If VOUT<1.0V, Tantalum type is recommended)
Input Capacitor; 1.0μF or more cap acity ceramic Type
R1161x
12
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 100 200 300 400 500 600
Output Current lOUT (mA)
Output Voltage VOUT (V)
1.45V
VIN =2.8V
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 100 200 300 400 500 600
Output Current lOUT (mA)
Output Voltage V
OUT
(V)
1.45V
VIN =2.8V
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0 100 200 300 400 500 600
Output Current lOUT (mA)
Output Voltage VOUT (V)
1.8V
VIN =3.5V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0 100 200 300 400 500 600
Output Current l
OUT
(mA)
Output Voltage V
OUT
(V)
1.8V
V
IN
=3.5V
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 100 200 300 400 500 600
Output Current l
OUT
(mA)
Output Voltage V
OUT
(V)
2.9V
V
IN
=4.6V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 100 200 300 400 500 600
Output Current l
OUT
(mA)
Output Voltage V
OUT
(V)
2.9V
V
IN
=4.6V
R1161x
13
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 100 200 300 400 500 600
Output Current l
OUT
(mA)
Output Voltage V
OUT
(V)
3.6V
V
IN
=5.3V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 100 200 300 400 500 600
Output Current l
OUT
(mA)
Output Voltage V
OUT
(V)
3.6V
V
IN
=5.3V
2) Output Voltage vs. Input Voltage
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
R1161x
14
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0123456
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
=30mA
I
OUT
=50mA
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0123456
Input Voltage VIN (V)
Output Voltage VOUT (V)
IOUT= 1mA
IOUT=30mA
IOUT=50mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0123456
Input Voltage VIN (V)
Output Voltage VOUT (V)
IOUT= 1mA
IOUT=30mA
IOUT=50mA
3) Supply Current vs. Input Voltage
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0
10
20
30
40
50
60
70
80
90
100
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
H (μA)
0
1
2
3
4
5
6
7
8
9
10
0123456
Input Voltage VIN (V)
Supply Current ISSL (μA)
R1161x
15
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
0
10
20
30
40
50
60
70
80
90
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
H (μA)
0
1
2
3
4
5
6
7
8
9
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
L (μA)
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
0
10
20
30
40
50
60
70
80
90
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
H (μA)
0
1
2
3
4
5
6
7
8
9
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
L (μA)
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
0
10
20
30
40
50
60
70
80
90
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
H (μA)
0
1
2
3
4
5
6
8
10
12
7
9
11
0123456
Input Voltage V
IN
(V)
Supply Current I
SS
L (μA)
R1161x
16
4) Output Voltage vs. Temperature
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
(V)
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
L (V)
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
H (V)
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
L (V)
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
2.57
2.58
2.59
2.60
2.61
2.62
2.63
2.64
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
H (V)
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
L (V)
2.57
2.58
2.59
2.60
2.61
2.62
2.63
2.64
R1161x
17
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
3.23
3.25
3.27
3.29
3.31
3.33
3.35
3.37
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
H (V)
-50 -25 0 25 50 75 100
Temperature Topt ( )
Output Voltage V
OUT
L (V)
3.23
3.25
3.27
3.29
3.31
3.33
3.35
3.37
5) Supply Current vs. Temperature
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0
10
20
30
40
50
70
110
90
60
100
80
-50 -25 0 25 50 75 100
Supply Current IssH (μA)
Temperature Topt ( )
0
1
2
3
4
5
6
7
-50 -25 0 25 50 75 100
Supply Current IssL (μA)
Temperature Topt ( )
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
0
10
20
30
40
50
60
80
70
-50 -25 0 25 50 75 100
Supply Current IssH (μA)
Temperature Topt ( )
0
1
2
3
4
5
6
8
7
-50 -25 0 25 50 75 100
Supply Current IssL (μA)
Temperature Topt ( )
R1161x
18
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
0
10
20
30
40
50
60
80
70
-50 -25 0 25 50 75 100
Supply Current IssH (μA)
Temperature Topt ( )
0
1
2
3
4
5
6
8
7
-50 -25 0 25 50 75 100
Supply Current IssL (μA)
Temperature Topt ( )
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
0
10
20
30
40
50
60
80
70
-50 -25 0 25 50 75 100
Supply Current IssH (μA)
Temperature Topt ( )
0
1
2
3
4
5
6
8
7
-50 -25 0 25 50 75 100
Supply Current IssL (μA)
Temperature Topt ( )
6) Dropout Voltage vs. Output Current
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current IOUT (mA)
Dropout Voltage VDIF_H (V)
85
25
-40
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_L (V)
85
25
-40
R1161x
19
R1161x09xx (ECO=H) R1161x09xx (ECO=L )
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_H (V)
85
25
-40
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current IOUT(mA)
Dropout Voltage VDIF_L (V)
85
25
-40
R1161x10xx (ECO=H) R1161x10xx (ECO=L )
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_H (V)
85
25
-40
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 50 100 150 200 250 300
Output Current IOUT (mA)
Dropout Voltage VDIF_L (V)
85
25
-40
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_H (V)
85
25
-40
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current IOUT (mA)
Dropout Voltage VDIF_L (V)
85
25
-40
R1161x
20
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current IOUT (mA)
Dropout Voltage VDIF_H (V)
85
25
-40
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_L (V)
85
25
-40
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current IOUT (mA)
Dropout Voltage VDIF_H (V)
85
25
-40
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200 250 300
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
_L (V)
85
25
-40
7) Dropout Voltage vs. Set Output Voltage (Topt=25°C)
R1161xxx1x (ECO=H) R1161xxx1x (ECO=L )
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.5 1 1.5 2 2.5 3 3.5
Set Output Voltage VREG (V)
Dropout Voltage VDIF_H (V)
IOUT=10mA
50mA
200mA
30mA
100mA
300mA
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.5 1 1.5 2 2.5 3 3.5
Set Output Voltage VREG (V)
Dropout Voltage V
DIF
_L (V)
I
OUT
=10mA
50mA
200mA
30mA
100mA
300mA
R1161x
21
8) Ripple Rejection vs. Input Bias (Topt=25°C CIN=none, COUT=Ceramic 1.0μF Ripple 0.2VP-P)
R1161x26xx (IOUT=1mA) R1161x26xx (IOUT=30mA)
0
10
20
30
40
50
60
70
80
2.6 2.7 2.8 2.9 3.0 3.1 3.2
Input Voltage V
IN
(V)
Ripple Rejection RR (dB)
f = 400Hz
f = 10kHz
f = 1kHz
f = 100kHz
0
10
20
30
40
50
60
70
80
2.6 2.7 2.8 2.9 3.0 3.1 3.2
Input Voltage VIN (V)
Ripple Rejection RR (dB)
f = 400Hz
f = 10kHz
f = 1kHz
f = 100kHz
R1161x26xx (IOUT=50mA)
0
10
20
30
40
50
60
70
80
2.6 2.7 2.8 2.9 3.0 3.1 3.2
Input Voltage V
IN
(V)
Ripple Rejection RR (dB)
f = 400Hz
f = 10kHz
f = 1kHz
f = 100kHz
9) Ripple Rejection vs. Frequency (CIN=none)
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8VDC+0.2Vp-p,
COUT=Tantal 1.0μFVIN=1.8VDC+0.2Vp-p,
COUT = Tantal 1.0μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x
22
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8VDC+0.2Vp-p,
COUT=Tantal 2.2μFVIN=1.8VDC+0.2Vp-p,
COUT = Tantal 2.2μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x10xx (ECO=H) R1161x10xx (ECO=L )
VIN=2.0VDC+0.2Vp-p,
COUT=Ceramic 1.0μFVIN=2.0VDC+0.2Vp-p,
COUT=Ceramic 1.0μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x10xx (ECO=H) R1161x10xx (ECO=L )
VIN=2.0VDC+0.2Vp-p,
COUT=Ceramic 2.2μFVIN=2.0VDC+0.2Vp-p,
COUT=Ceramic 2.2μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x
23
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
VIN=2.5VDC+0.2Vp-p,
COUT=1.0μFVIN=2.5VDC+0.2Vp-p,
COUT=1.0μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x15xx (ECO=H) R1161x15xx (ECO=L )
VIN=2.5VDC+0.2Vp-p,
COUT=2.2μFVIN=2.5VDC+0.2Vp-p,
COUT=2.2μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
VIN=3.6VDC+0.2Vp-p,
COUT = Ceramic 1.0μFVIN=3.6VDC+0.2Vp-p,
COUT = Ceramic 1.0μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x
24
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
VIN=3.6VDC+0.2Vp-p,
COUT = Ceramic 2.2μFVIN=3.6VDC+0.2Vp-p,
COUT = Ceramic 2.2μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
VIN=4.3VDC+0.2Vp-p,
COUT = Ceramic 1.0μFVIN=4.3VDC+0.2Vp-p,
COUT= Ceramic 1.0μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
VIN=4.3VDC+0.2Vp-p,
COUT= Ceramic 2.2μFVIN=4.3VDC+0.2Vp-p,
COUT= Ceramic 2.2μF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_H (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100
Frequency f (kHz)
RIpple Rejection RR_L (dB)
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
R1161x
25
10) Input Transient Response (CIN = none, tr=tf=5μs)
R1161x08xx (ECO=H) R1161x08x (ECO=L)
IOUT=30mA,
COUT = Tantalum 1.0μFIOUT=10mA,
COUT = Tantalum 1.0μF
0.76
0.78
0.80
0.82
0.84
0.86
0.88
-2
-1
0
1
2
3
4
0102040608010030 50 70 90
Time t (μs)
Output Voltage V
OUT
(V)
Input Voltage
Output Voltage
Input Voltage V
IN
(V)
0
0.5
1.0
1.5
2.0
2.5
3.0
-2
-1
0
1
2
3
4
0 0.4 0.8 1.6 2.4 3.2 4.01.2 2.0 2.8 3.6
Time t (ms)
Output Voltage VOUT (V)
Input Voltage
Output Voltage
Input Voltage VIN (V)
R1161x10xx (ECO=H) R1161x10xx (ECO=L )
IOUT=30mA,
COUT = Ceramic 1.0μFIOUT=10mA,
COUT= Ceramic 1.0μF
0.96
0.98
1.00
1.02
1.04
1.06
1.08
-2
-1
0
1
2
3
4
0102040608010030 50 70 90
Time t (μs)
Output Voltage V
OUT
(V)
Input Voltage
Output Voltage
Input Voltage V
IN
(V)
0
0.5
1.0
1.5
2.0
2.5
3.0
-2
-1
0
1
2
3
4
0 0.4 0.8 1.6 2.4 3.2 4.01.2 2.0 2.8 3.6
Time t (ms)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
Input Voltage
Output Voltage
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
IOUT=30mA,
COUT= Ceramic 1.0μFIOUT=10mA,
COUT= Ceramic 1.0μF
2.56
2.58
2.60
2.62
2.64
2.66
2.68
-1
0
1
2
3
4
4
0102040608010030 50 70 90
Time t (μs)
Output Voltage VOUT (V)
Input Voltage
Output Voltage
Input Voltage VIN (V)
0
2.5
3.0
3.5
4.0
4.5
5.0
-1
0
1
2
3
4
5
0 0.4 0.8 1.6 2.4 3.2 4.01.2 2.0 2.8 3.6
Time t (ms)
Output Voltage VOUT (V)
Input Voltage
Output Voltage
Input Voltage VIN (V)
R1161x
26
11) Load Transient Response (tr=tf=0.5μs)
R1161x08xx (ECO=H) R1161x08xx (ECO=H)
VIN=1.8V
CIN= tantalum 1.0μF,COUT = tantalum 1.0μFVIN=1.8V
CIN = tantalum 1.0μF, COUT = tantalum 1.0μF
0.6
0.7
0.8
0.9
1.0
1.1
1.2
-150
-100
-50
0
50
100
150
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Output Voltage
Load Current IOUT (mA)
Load Current
0.6
0.7
0.8
0.9
1.0
1.1
1.2
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8V,
CIN = tantalum 1.0μF COUT = tantalum 2.2μFVIN=1.8V,
CIN = tantalum 1.0μF COUT= tantalum 1.0μF
0.6
0.7
0.8
0.9
1.0
1.1
1.2
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
0
0.5
1.0
1.5
2.0
2.5
3.0
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x08xx (ECO=L) R1161x10xx (ECO =H)
VIN=1.8V,
CIN = tantalum 1.0μF COUT = Tantalum 2.2μFVIN=2.0V,
CIN = Ceramic 1.0μF COUT= Ceramic 1.0μF
0
0.5
1.0
1.5
2.0
2.5
3.0
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
-150
-100
-50
0
50
100
150
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x
27
R1161x10xx (ECO=H) R1161x10xx (ECO=H)
VIN=2.0V,
CIN= Ceramic 1.0μF, COUT = Ceramic 2.2μFVIN=2.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.8
0.9
1.0
1.1
1.2
1.3
1.4
-150
-100
-50
0
50
100
150
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x10xx (ECO=H) R1161x10xx (ECO=H)
VIN=2.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 2.2μFVIN=2.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.8
0.9
1.0
1.1
1.2
1.3
1.4
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
0
0.5
1.0
1.5
2.0
2.5
3.0
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x10xx (ECO=L) R1161x10xx (ECO=L)
VIN=2.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 2.2μFVIN=2.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0
0.5
1.0
1.5
2.0
2.5
3.0
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-150
-100
-50
0
50
100
150
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x
28
R1161x26xx (ECO=H) R1161x26xx (ECO=H)
VIN=3.6V,
CIN = Ceramic 1.0μF COUT = Ceramic 2.2μFVIN=3.6V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-150
-100
-50
0
50
100
150
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
VIN=3.6V,
CIN = Ceramic 1.0μF COUT = Ceramic 2.2μFVIN=3.6V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-120
-90
-60
-30
0
30
60
0 5 10 20 30 4015 25 35
Time t (μs)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x26xx (ECO=L)
VIN=3.6V,
CIN = Ceramic 1.0μF COUT = Ceramic 2.2μF
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-40
-30
-20
-10
0
10
20
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5
Time t (ms)
Output Voltage VOUT (V)
Load Current
Output Voltage
Load Current IOUT (mA)
R1161x
29
12) Turn on speed with CE pin
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μFVIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μF
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 10 30 50 700 204060
Time t (μs)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→1.8V
I
OUT
=0mA
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 10 30 50 700 204060
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→1.8V
I
OUT
=0mA
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μFVIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μF
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 10 30 50 700 204060
Time t (μs)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=0V→1.8V
IOUT=30mA
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 10 30 50 700 204060
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=0V→1.8V
IOUT=30mA
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μFVIN=1.8V, CIN =Tantalum 1.0μF
COUT = Tantalum 1.0μF
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 10 30 50 700 204060
Time t (μs)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→1.8V
I
OUT
=300mA
-2.7
-1.8
-0.9
0.0
0.9
1.8
2.7
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-0.3-0.2 -0.1 0.1 0.3 0.5 0.70.0 0.2 0.4 0.6
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→1.8V
I
OUT
=300mA
R1161x
30
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
VIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-60 -40 -20 20 60 100 1400 40 80 120
Time t (μs)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→4.3V
I
OUT
=0mA
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-120-80 -40 40 120 200 2800 80 160 240
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→4.3V
I
OUT
=0mA
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
VIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-60 -40 -20 20 60 100 1400 40 80 120
Time t (μs)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=0V→4.3V
IOUT=30mA
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-0.3 -0.2-0.1 0.1 0.3 0.5 0.70 0.2 0.4 0.6
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=0V→4.3V
IOUT=30mA
R1161x33xx (ECO=H) R1161x33xx (ECO=L )
VIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-60 -40 -20 20 60 100 1400 40 80 120
Time t (μs)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→4.3V
I
OUT
=300mA
-10
-8
-6
-4
0
4
-2
2
6
-1
0
1
2
4
6
3
5
7
-0.3 -0.2-0.1 0.1 0.3 0.5 0.70 0.2 0.4 0.6
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=0V→4.3V
I
OUT
=300mA
R1161x
31
13) Turn-off Speed with CE
R1161x08xD R1161x08xD
VIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μFVIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μF
-1.8
-1.2
-0.6
0.0
1.2
2.4
0.6
1.8
-0.5
0.0
0.5
1.0
2.0
3.0
1.5
2.5
-0.6 -0.4 -0.2 0.2 0.6 1.00 0.4 0.8 1.2
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=1.8V→0V
IOUT=0mA
-1.8
-1.2
-0.6
0.0
1.2
2.4
0.6
1.8
-0.5
0.0
0.5
1.0
2.0
3.0
1.5
2.5
-0.6 -0.4 -0.2 0.2 0.6 1.00 0.4 0.8 1.2
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=1.8V→0V
IOUT=30mA
R1161x08xD R1161x33xD
VIN=1.8V, CIN = Tantalum 1.0μF
COUT = Tantalum 1.0μFVIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
-1.8
-1.2
-0.6
0.0
1.2
2.4
0.6
1.8
-0.5
0.0
0.5
1.0
2.0
3.0
1.5
2.5
-0.6 -0.4 -0.2 0.2 0.6 1.00 0.4 0.8 1.2
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=1.8V→0V
IOUT=300mA
-5
-4
-3
-2
1
4
-1
3
5
-1
0
1
2
5
8
3
7
0
2
4
6
9
-0.3 -0.2-0.1 0.1 0.3 0.5 0.70 0.2 0.4 0.6
Time t (ms)
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
VCE=4.3V→0V
IOUT=0mA
R1161x33xD R1161x33xD
VIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=4.3V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
-5
-4
-3
-2
1
4
-1
3
5
-1
0
1
2
5
8
3
7
0
2
4
6
9
-0.3 -0.2-0.1 0.1 0.3 0.5 0.70 0.2 0.4 0.6
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=4.3V→0V
I
OUT
=30mA
-5
-4
-3
-2
1
4
-1
3
5
-1
0
1
2
5
8
3
7
0
2
4
6
9
-0.3 -0.2-0.1 0.1 0.3 0.5 0.70 0.2 0.4 0.6
Time t (ms)
CE Input Voltage V
CE
(V)
Output Voltage V
OUT
(V)
V
CE
=4.3V→0V
I
OUT
=300mA
R1161x
32
14)Output Voltage at Mode alternative point
R1161x08xx R1161x08xx
VIN=1.8V, CIN = Ceramic 1.0μF
COUT = Tantalum 1.0μFVIN=1.8V, CIN = Ceramic 1.0μF
COUT = Tantalum 1.0μF
0.81
0.81
0.79
0.80
0.81
0.79
0.80
-0.2 0 0.2 0.6 1.0 1.4 1.80.4 0.8 1.2 1.6
0.79
0.78
0.80
0.79
0.81
0.80
0.81
0.81
0.79
0.80
0.79
0.80
3
2
1
0
V
ECO
= 0V↔1.4V
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 200mA
I
OUT
= 300mA
Time t (ms)
Onput Voltage V
OUT
(V)
ECO Input Voltage V
ECO
(V)
0.78
0.79
0.80
0.81
0.83
0.85
0.82
0.84
0.86
0
2
1
3
-100103050709020 40 60 80
Time t (ms)
Onput Voltage V
OUT
(V)
ECO Input Voltage V
ECO
(V)
V
ECO
=0V
↔
1.8V
I
OUT
=0mA
R1161x10xx R1161x10xx
VIN=2.0V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=2.0V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
1.01
1.01
0.99
1.00
1.01
0.99
1.00
-0.2 0 0.2 0.6 1.0 1.4 1.80.4 0.8 1.2 1.6
Time t (ms)
Onput Voltage VOUT (V)
ECO Input Voltage VECO (V)
0.99
0.98
1.00
0.99
1.01
1.00
1.01
1.01
0.99
1.00
0.99
1.00
3
2
1
0
V
ECO
= 0V↔2.0V
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 200mA
I
OUT
= 300mA
0.98
0.99
1.0
1.01
1.03
1.05
1.02
1.04
1.06
0
2
1
3
-100103050709020 40 60 80
Time t (ms)
Onput Voltage V
OUT
(V)
ECO Input Voltage V
ECO
(V)
V
ECO
=0V
↔
2.0V
I
OUT
=0mA
R1161x
33
R1161x26xx R1161x26xx
VIN=3.6V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μFVIN=3.6V, CIN = Ceramic 1.0μF
COUT = Ceramic 1.0μF
2.61
2.61
2.59
2.60
2.61
2.59
2.60
-0.2 0 0.2 0.6 1.0 1.4 1.80.4 0.8 1.2 1.6
Time t (ms)
Onput Voltage V
OUT
(V)
ECO Input Voltage V
ECO
(V)
2.59
2.58
2.60
2.59
2.61
2.60
2.61
2.61
2.59
2.60
2.59
2.60
5
3
1
4
2
0
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 200mA
I
OUT
= 300mA
V
ECO
= 0V↔3.6V
2.58
2.59
2.60
2.61
2.63
2.65
2.62
2.64
2.66
1
3
0
2
4
-100103050709020 40 60 80
Time t (ms)
Onput Voltage V
OUT
(V)
ECO Input Voltage V
ECO
(V)
V
ECO
=0V
↔
3.6V
I
OUT
=0mA
R1161x
34
TECHNICAL NOTES
C1
VDD OUT
CE
GND
R1161xxxxx
SERIES
ECO
C2
When using these ICs, consider the follo wing points:
1.Mounting on PCB
Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a cap acitor C1 with as much as 1.0µF capacitor between VDD and GND pin as close as possible.
Set external components, especially the output capacitor as close as possible to the ICs and make wiring as
short as possible.
2.Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For
this purpose, be sure to use a 1.0μF more capacitor C2 with good frequency characteristics and ESR
(Equivalent Series Resistance).
Output Voltage Recommended Value of C2
VOUT<1.0V 1.0μF or more Tantalum Capacitor
1.0V
<
=
VOUT 1.0μF or more Ceramic Capacitor
(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase
compensation, the operation might be unstable. Because of this, test these ICs with as same external
component s as ones to be used on the PCB.)
If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable.
Evaluate your circuit with considering frequency characteristics.
Depending on the capacitor size, manufacturer, and part number, the bias characteristics and temperature
characteristics are different . Evaluate the circuit with a ctual u sing capacitors.
R1161x
35
ESR vs. Output Current
When using these ICs, consider the follo wing points:
In these ICs, phase compensation is made for securing stable operation even if the output current is varied.
For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent
Series Resistance) in the range described as follows:
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below.
The conditions when the white noise level is under 40μV (A vg.) are marked as the hatched area in the graph.
<Test conditions>
(1) Frequency band: 10Hz to 2M Hz
(2) Temperature: 25°C
R1161x08xx (ECO=H) R1161x08xx (ECO=L )
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μFVIN=1.4V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
R1161x10xx (ECO=H) R1161x10xx (ECO=L )
VIN=1.4V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μFVIN=1.4V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
R1161x
36
R1161x26xx (ECO=H) R1161x26xx (ECO=L )
VIN=3.0V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μFVIN=3.0V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
R1161x15xx (ECO=H) R1161x30xx (ECO=H)
VIN=2.0V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μFVIN=3.6V to 6.0V,
CIN = Ceramic 1.0μF COUT = Ceramic 1.0μF
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
0.01
0.1
1
10
100
0 50 100 150 200 250 300
Output Current l
OUT
(mA)
ESR (Ω)
RICOHCOMPANY,LTD.
ElectronicDevicesCompany
http://www.ricoh.com/LSI/
For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive.
Basically after Apr. 1, 2012, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are
also Antimony Free.)
Halogen Free
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RICOHEUROPE(NETHERLANDS)B.V.
●SemiconductorSupportCentre
NieuwKronenburgProf.W.H.Keesomlaan1,1183DJ,Amstelveen,TheNetherlands
P.O.Box114,1180ACAmstelveen
Phone:+31-20-5474-309Fax:+31-20-5474-791
RICOHELECTRONICDEVICESKOREACo.,Ltd.
11floor,Haesung1building,942,Daechidong,Gangnamgu,Seoul,Korea
Phone:+82-2-2135-5700Fax:+82-2-2135-5705
RICOHELECTRONICDEVICESSHANGHAICo.,Ltd.
Room403,No.2Building,690#BiBoRoad,PuDongNewdistrict,Shanghai201203,
People'sRepublicofChina
Phone:+86-21-5027-3200Fax:+86-21-5027-3299
RICOHCOMPANY,LTD.
ElectronicDevicesCompany
●Taipeioffice
Room109,10F-1,No.51,HengyangRd.,TaipeiCity,Taiwan(R.O.C.)
Phone:+886-2-2313-1621/1622Fax:+886-2-2313-1623
1.Theproductsandtheproductspecificationsdescribedinthisdocumentaresubjecttochangeor
discontinuationofproductionwithoutnoticeforreasons
suchasimprovement.Therefore,before
decidingtousetheproducts,pleaserefertoRicohsalesrepresentativesforthelatest
informationthereon.
2.Thematerialsinthisdocumentmaynotbecopiedorotherwisereproducedinwholeorinpart
withoutpriorwrittenconsentofRicoh.
3.Pleasebesuretotakeanynecessaryformalitiesunderrelevantlawsorregulationsbefore
exportingorotherwisetakingoutofyourcountrytheproductsorthetechnicalinformation
describedherein.
4.Thetechnicalinformationdescribedinthisdocumentshowstypicalcharacteristicsofand
exampleapplicationcircuitsfortheproducts.Thereleaseofsuchinformationisnottobe
construedasawarrantyoforagrantoflicenseunderRicoh'soranythirdparty'sintellectual
propertyrightsoranyotherrights.
5.
Theproductslistedinthisdocumentareintendedanddesignedforuseasgeneralelectronic
componentsinstandardapplications(officeequipment,telecommunicationequipment,
measuringinstruments,consumerelectronicproducts,amusementequipmentetc.).Those
customersintendingtouse
aproductinanapplicationrequiringextremequalityandreliability,
forexample,inahighlyspecificapplicationwherethefailureormisoperationoftheproduct
couldresultinhumaninjuryordeath(aircraft,spacevehicle,nuclearreactorcontrolsystem,
trafficcontrolsystem,automotiveand
transportationequipment,combustionequipment,safety
devices,lifesupportsystemetc.)shouldfirstcontactus.
6.Wearemakingourcontinuousefforttoimprovethequalityandreliabilityofourproducts,but
semiconductorproductsarelikelytofailwithcertainprobability.Inordertopreventanyinjuryto
personsordamagestopropertyresultingfromsuchfailure,customersshouldbecarefulenough
toincorporatesafetymeasuresintheirdesign,suchasredundancyfeature,firecontainment
featureandfail-safefeature.Wedonotassumeanyliability
orresponsibilityforanylossor
damagearisingfrommisuseorinappropriateuseoftheproducts.
7.Anti-radiationdesignisnotimplementedintheproductsdescribedinthisdocument.
8.
PleasecontactRicohsalesrepresentativesshouldyouhaveanyquestionsorcomments
concerningtheproductsorthetechnicalinformation.