R1171x SERIES
2.0A/1.5A LDO REGULATOR
NO. EA-125-111027
1
OUTLINE
The R1171x Series are CMOS-based positive voltage regulator ICs. The R1171x Series have features of low
dropout voltage, high output voltage accuracy, low consumption current. Each of these ICs consists of a voltage
reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a
chip enable circuit, and ther mal shutdown circuit. The output voltage of R1171 is fixed in the IC.
Low consumption current by the merit of CMOS process and built-in transistors with low ON-resistance make
low dropout voltage and chip enable function prolongs the battery life. These regulators are remarkable
improvement on the current regulators in terms of inpu t transient response, and load transient response.
Thus, the R1171x Series are suitable for various power source s.
Since the packag es for these ICs are high watt age HS OP-6J p ackage, T O-252 -5-P1, high density mounting of
the ICs on boards is possible.
FEATURES
• Supply Current............................................................. Typ. 130μA
• Standby Current........................................................... Typ. 0.1μA
• Output Current ............................................................. Min. 1.5A (VIN=VOUT+1.0V, R1171Sxx1A/B)
Min. 2.0A (VIN=VOUT+1.0V, R1171Jxx1C/D)
• Input Voltage................................................................ 2.1V to 6.0V
• Output Voltage ............................................................. 1.5V to 5.0V (0.1V steps) (R1171Sxx1A/B)
1.8V to 5.0V (0.1V steps) (R1171Jxx1C/D)
(
For other voltages, please refer to MARK INFORMATIONS.)
• Output Voltage Accuracy.............................................. ± 2.0%
• Dropout Voltage ........................................................... Typ. 0.09V (VOUT=3.0V, IOUT=300mA)
• Temperature-drift Coefficient of Output Voltage........... Typ. ± 100ppm/°C
• Line Regulation............................................................ Typ. 0.05%/V
• Packages ..................................................................... HSOP-6J, TO-252-5-P1
• Built-in Current Limit Circuit
• Built-in Thermal Shutdown Circuit
• Ceramic capacitor for phase compensation ................ CIN=COUT=Ceramic 10μF (VOUT<1.8V)
C
IN=COUT=Ceramic 4.7μF (VOUT
>
=
1.8V)
APPLICATIONS
• Local Power source for Notebook PC.
• Local Power source for portable appliances, cameras, and videos.
• Local Power source for equipment of battery-use.
• Local Power source for home appliances.
R1171x
2
BLOCK DIAGRAMS
R1171xxx1A/C R1171xxx1B/D
V
DD
GND
V
OUT
CE
Vref
Cur r ent Li mit
Thermal Shutdown
GND
V
DD
GND
V
OUT
CE
Vref
Curren t Li mi t
T herm al Sh ut d own
GND
SELECTION GUIDE
The output voltage, chi p enable polarity, package for the ICs can be selected at the user’s request.
Product Name Package Quantity per Reel Pb Free Halogen Free
R1171Sxx1∗-E2-FE HSOP-6J 1,000 pcs Yes Yes
R1171Jyy1$-T1-F TO-252-5-P1 3,000 pcs Yes No
xx : The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V steps.
(For other voltages, please refer to MARK INFORMA TIONS.)
yy : The output voltage can be designated in the range from 1.8V(18) to 5.0V(50) in 0.1V steps.
(For other voltages, please refer to MARK INFORMA TIONS.)
∗ : CE pin polarity are options as follows.
(A) "L" active
(B) "H" active
$ : CE pin polarity are options as follows.
(C) "L" active
(D) "H" active
R1171x
3
PIN CONFIGURATIONS
z HSOP-6J z TO-252-5-P1
13
64
2
5
12345
PIN DESCRIPTIONS
• HSOP-6J
Pin No Symbol Pin Description
1 VOUT Output Pin
2 GND Ground Pin
3 CE or CE Chip Enable Pin
4 NC No Connection
5 GND Ground Pin
6 VDD Input Pin
• TO-252-5-P1
Pin No Symbol Pin Description
1 VOUT Output Pin
2 CE or CE Chip Enable Pin
3 GND Ground Pin
4 GND Ground Pin
5 VDD Input Pin
∗) No.3 and No.4 pins must be wired short each other and connected to the GND plane when it is mounted on
board.
R1171x
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN Input Voltage 7.0 V
VCE Input Voltage ( CE or CE Input Pin) −0.3 to VIN+0.3 V
VOUT Output Voltage −0.3 to VIN+0.3 V
Power Dissipation (HSOP-6J)∗1 1700
PD Power Dissi pation (TO-252-5-P1)∗1 1900 mW
Topt Operating Temperature −40 to 85 °C
Tstg Storage Temperature −55 to 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 and may degrade the life time and safety for both device and system u sing 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 b e designed that the mounted semiconductor 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 su rge. And the semicondu ctor devices may receive seriou s damage when they continu e
to operate over the recommended operating conditions.
R1171x
5
ELECTRICAL CHARACTERISTICS
• R1171Sxx1A Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN−VOUT=1.0V, IOUT=200mA ×0.98 ×1.02 V
ΔVOUT/
ΔIOUT Load Regulation VIN−VOUT=1.0V
1mA
<
=
IOUT
<
=
300mA 10 60 mV
1.5
<
=
VOUT<1.6 0.16 0.35
1.6
<
=
VOUT<1.7 0.14 0.32
1.7
<
=
VOUT<1.8 0.13 0.28
1.8
<
=
VOUT<2.0 0.12 0.24
2.0
<
=
VOUT<2.5 0.10 0.21
VDIF Dropout Voltage IOUT=300mA
2.5
<
=
VOUT
<
=
5.0 0.09 0.18
V
ISS Supply Current VIN−VOUT =1.0V, VCE=0V 130 320
μA
Istandby Standby Current VIN−VOUT=1.0V, VIN=VCE 0.1 2.0 μA
ΔVOUT/ΔVIN Line Regulation IOUT=200mA
RR Ripple Rejection f=1kHz, Ripple 0.5Vp-p Refer to the following table
VIN Input Voltage 2.1 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=10mA
−40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
ILIM Output Current VIN−VOUT=1.0V 1.5 A
ISC Short Current Limit VOUT=0V 200 mA
RPU Pull-up resistance for CE pin 2.5 5.0 10.0
MΩ
VCEH CE Input Voltage "H" 1.2 VIN V
VCEL CE Input Voltage "L" 0 0.25 V
TTSD Thermal Shut down
Detector Threshold Temperature Junction Temperature 150 °C
TTSR Thermal Shut down
Released Temperature Junction Temperature 120 °C
• Line Regulation by Output Voltage Topt=25°C
Line Regulation ΔVOUT/ΔVIN (% /V)
Output Voltage
VOUT (V) Condition Typ. Max.
1.5
<
=
VOUT < 1.6 IOUT=200mA, 2.1V
<
=
VIN
<
=
6.0V
1.6
<
=
VOUT
<
=
5.0 IOUT=200mA, VOUT+0.5V
<
=
VIN
<
=
6.0V 0.05 0.30
• Ripple Rejection by Output Voltage Topt=25°C
Ripple Rejection RR (dB)
Output Voltage
VOUT (V) Condition Typ.
1.5
<
=
VOUT < 4.7 f=1kHz, Ripple 0.5Vp-p, VIN−VOUT=1.0V
4.7
<
=
VOUT
<
=
5.0 f=1kHz, Ripple 0.5Vp-p, VIN=5.75V 50
R1171x
6
• R1171Sxx1B Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Reference Voltage for
Adjustable Voltage Regulator VIN−VOUT=1.0V
IOUT=200mA ×0.98 ×1.02 V
ΔVOUT/
ΔIOUT Load Regulation VIN−VOUT=1.0V
1mA
<
=
IOUT
<
=
300mA 10 60 mV
1.5
<
=
VOUT<1.6 0.16 0.35
1.6
<
=
VOUT<1.7 0.14 0.32
1.7
<
=
VOUT<1.8 0.13 0.28
1.8
<
=
VOUT<2.0 0.12 0.24
2.0
<
=
VOUT<2.5 0.10 0.21
VDIF Dropout Voltage IOUT=300mA
2.5
<
=
VOUT
<
=
5.0 0.09 0.18
V
ISS Supply Current VIN−VOUT=1.0V, VCE=VIN 130 320
μA
Istandby Standby Current VIN−VOUT=1.0V, VCE=0V 0.1 2.0
μA
ΔVOUT/ΔVIN Line Regulation IOUT=200mA
RR Ripple Rejection f=1kHz, Ripple 0.5Vp-p Refer to the following table
VIN Input Voltage 2.1 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=10mA
−40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
ILIM Output Current VIN−VOUT=1.0V 1.5 A
ISC Short Current Limit VOUT=0V 200 mA
RPD Pull-down resistance
for CE pin 2.5 5.0 10.0
MΩ
VCEH CE Input Voltage "H" 1.2 VIN V
VCEL CE Input Voltage "L" 0 0.25 V
TTSD Thermal Shut down
Detector Threshold Temperature Junction Temperature 150 °C
TTSR Thermal Shut down
Released Temperature Junction Temperature 120 °C
• Line Regulation by Output Voltage Topt=25°C
Line Regulation ΔVOUT/ΔVIN (% /V)
Output Voltage
VOUT (V) Condition Typ. Max.
1.5
<
=
VOUT < 1.6 IOUT=200mA, 2.1V
<
=
VIN
<
=
6.0V
1.6
<
=
VOUT
<
=
5.0 IOUT=200mA, VOUT+0.5V
<
=
VIN
<
=
6.0V 0.05 0.30
• Ripple Rejection by Output Voltage Topt=25°C
Ripple Rejection RR (dB)
Output Voltage
VOUT (V) Condition Typ.
1.5
<
=
VOUT < 4.7 f=1kHz, Ripple 0.5Vp-p, VIN−VOUT=1.0V
4.7
<
=
VOUT
<
=
5.0 f=1kHz, Ripple 0.5Vp-p, VIN=5.75V 50
R1171x
7
• R1171Jxx1C
Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN−VOUT=1.0V
IOUT=200mA ×0.98 ×1.02 V
ΔVOUT/
ΔIOUT Load Regulation VIN−VOUT=1.0V
1mA
<
=
IOUT
<
=
300mA 10 60 mV
1.8
<
=
VOUT<2.0 0.12 0.24
2.0
<
=
VOUT<2.5 0.10 0.21
VDIF Dropout Voltage IOUT=300mA 2.5
<
=
VOUT
<
=
5.0 0.09 0.18
V
ISS Supply Current VIN−VOUT=1.0V, VCE=0V 130 320
μA
Istandby Standby Current VIN−VOUT =1.0V, VIN=VCE 0.1 2.0 μA
ΔVOUT/
ΔVIN Line Regulation IOUT=200mA
VOUT+0.5V
<
=
VIN
<
=
6V 0.05 0.30 %/V
RR Ripple Rejection f=1kHz, Ripple 0.5Vp-p Refer to the following table
VIN Input Voltage 2.1 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=10mA
−40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
ILIM Output Current VIN−VOUT=1.0V 2.0 A
ISC Short Current Limit VOUT=0V 200 mA
RPU Pull-up resistance for CE pin 2.5 5.0 10.0
MΩ
VCEH CE Input Voltage "H" 1.2 VIN V
VCEL CE Input Voltage "L" 0 0.25 V
TTSD Thermal Shut down
Detector Threshold
Temperature Junction Temperature 150 °C
TTSR Thermal Shut down
Released Temperature Junction Temperature 120 °C
• Ripple Rejection by Output Voltage Topt=25°C
Ripple Rejection RR (dB)
Output Voltage
VOUT (V) Condition Typ.
1.8
<
=
VOUT < 4.7 f=1kHz, Ripple 0.5Vp-p, VIN−VOUT=1.0V
4.7
<
=
VOUT
<
=
5.0 f=1kHz, Ripple 0.5Vp-p, VIN=5.75V 50
R1171x
8
• R1171Jxx1D
Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Reference Voltage for
Adjustable Voltage Regulator VIN−VOUT=1.0V
IOUT=200mA ×0.98 ×1.02 V
ΔVOUT/
ΔIOUT Load Regulation VIN−VOUT=1.0V
1mA
<
=
IOUT
<
=
300mA 10 60 mV
1.8
<
=
VOUT<2.0 0.12 0.24
2.0
<
=
VOUT<2.5 0.10 0.21
VDIF Dropout Voltage IOUT=300mA 2.5
<
=
VOUT
<
=
5.0 0.09 0.18
V
ISS Supply Current VIN−VOUT=1.0V, VCE=VIN 130 320
μA
Istandby Standby Current VIN−VOUT=1.0V, VCE=0V 0.1 2.0
μA
ΔVOUT/
ΔVIN Line Regulation IOUT=200mA
VOUT+0.5V
<
=
VIN
<
=
6V 0.05 0.30 %/V
RR Ripple Rejection f=1kHz, Ripple 0.5Vp-p Refer to the following table
VIN Input Voltage 2.1 6.0 V
ΔVOUT/
ΔTopt Output Voltage
Temperature Coefficient IOUT=10mA
−40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
ILIM Output Current VIN−VOUT=1.0V 2.0 A
ISC Short Current Limit VOUT=0V 200 mA
RPD Pull-down resistance
for CE pin 2.5 5.0 10.0
MΩ
VCEH CE Input Voltage "H" 1.2 VIN V
VCEL CE Input Voltage "L" 0 0.25 V
TTSD Thermal Shut down
Detector Threshold
Temperature Junction Temperature 150 °C
TTSR Thermal Shut down
Released Temperature Junction Temperature 120 °C
• Ripple Rejection by Output Voltage Topt=25°C
Ripple Rejection RR (dB)
Output Voltage
VOUT (V) Condition Typ.
1.8
<
=
VOUT < 4.7 f=1kHz, Ripple 0.5Vp-p, VIN−VOUT=1.0V
4.7
<
=
VOUT
<
=
5.0 f=1kHz, Ripple 0.5Vp-p, VIN=5.75V 50
R1171x
9
TEST CIRCUITS
I
OUT
IN V
DD
V
OUT
CE
GND C
OUT
C
IN
OUT
R1171xxx1B
Series
I
SS
IN V
DD
V
OUT
CE
GND C
OUT
C
IN
OUT
R1171xxx1B
Series
Standard Test Circuit Supply Current Test Circuit
I
OUT
IN V
DD
V
OUT
CE
GND C
OUT
OUT
R1171xxx1B
Series
P.G.
IN V
DD
V
OUT
CE
GND
C
OUT
C
IN
OUT
R1171xxx1B
Series
I
1
I
2
Test Circuit for Ripple Rejection, Test Circuit for Load Transient Response
Input Transient Response
R1171x
10
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current (Topt=25°C)
R1171S151x R1171S201x
0 2500 30001500 20001000500 3500
Output Current I
OUT
(mA)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.8
1.6
Output Voltage VOUT(V)
V
IN
=2.5V
V
IN
=2.0V
V
IN
=3.5V
0 2500 30001500 20001000500 3500
Output Current IOUT(mA)
0
0.5
1.0
1.5
2.0
2.5
Output Voltage V
OUT
(V)
VIN=2.5V
VIN=4.0V
VIN=3.0V
R1171S301x R1171S501x
0 2500 30001500 20001000500 3500
Output Current I
OUT
(mA)
0
0.5
1.0
1.5
2.0
2.5
3.5
3.0
Output Voltage VOUT(V)
V
IN
=4.0V
V
IN
=3.5V
V
IN
=5.0V
0 2500 30001500 20001000500 3500
Output Current IOUT(mA)
0
1
2
3
4
5
6
Output Voltage V
OUT
(V)
VIN=5.5V
VIN=6.0V
R1171J181x R1171J501x
0 2500 30001500 20001000500 3500
Output Current
I
OUT
(mA)
Output Voltage VOUT(V)
V
IN
=2.3V
V
IN
=2.8V
V
IN
=3.8V
0
2.0
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0.2
0 2500 30001500 20001000500 3500
Output Current
I
OUT
(mA)
0
1
2
3
4
5
6
Output Voltage V
OUT
(V)
V
IN
=5.5V
V
IN
=6.0V
R1171x
11
2) Output Voltage vs. Input Voltage (Topt=25°C)
R1171x151B R1171x201B
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=300mA
I
OUT
=500mA
145326
Input Voltage V
IN
(V)
1.2
1.3
1.4
1.5
1.6
1.7
1.8
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=300mA
I
OUT
=500mA
145326
Input Voltage V
IN
(V)
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
Output Voltage V
OUT
(V)
R1171x301B R1171x501B
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=300mA
I
OUT
=500mA
24536
Input Voltage V
IN
(V)
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=300mA
I
OUT
=500mA
4.0 5.55.04.5 6.0
Input Voltage V
IN
(V)
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
Output Voltage V
OUT
(V)
3) Dropout Voltage vs. Output Current
R1171S151x R1171S201x
0 1250250 750 1000500 1500
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85
°C
25
°C
-40
°C
0 1250250 750 1000500 1500
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85
°C
25
°C
-40
°C
R1171x
12
R1171S301x R1171S501x
0 1250250 750 1000500 1500
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85
°C
25
°C
-40
°C
0 1250250 750 1000500 1500
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85
°C
25
°C
-40
°C
R1171J181x R1171J201x
0
175015001250250 750 1000500 2000
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85
°C
25
°C
-40
°C
0
175015001250250 750 1000500 2000
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
85
°C
25
°C
-40
°C
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
R1171J301x R1171J501x
0
175015001250250 750 1000500 2000
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
85
°C
25
°C
-40
°C
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
0
175015001250250 750 1000500 2000
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
85
°C
25
°C
-40
°C
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
R1171x
13
4) Output Voltage vs. Temperature
R1171x151B R1171x201B
-50 75-25 25 500 100
1.40
1.60
1.55
1.50
1.45
Temperature Topt(°C)
Output Voltage VOUT(V)
VIN=2.5V, IOUT=200mA
-50 75-25 25 500 100
1.90
2.10
2.05
2.00
1.95
Temperature Topt(°C)
Output Voltage V
OUT
(V)
V
IN
=3.0V, I
OUT
=200mA
R1171x301B R1171x501B
-50 75-25 25 500 100
2.80
3.20
3.10
3.00
3.15
3.05
2.90
2.85
2.95
Temperature Topt(°C)
Output Voltage V
OUT
(V)
V
IN
=4.0V, I
OUT
=200mA
-50 75-25 25 500 100
4.80
5.20
5.10
5.00
5.15
5.05
4.90
4.85
4.95
Temperature Topt(°C)
Output Voltage V
OUT
(V)
V
IN
=5.0V, I
OUT
=200mA
5) Supply Current vs. Input Voltage (Topt=25°C)
R1171x151B R1171x201B
01 45326
Input Voltage V
IN
(V)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
01 45326
Input Voltage V
IN
(V)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
R1171x
14
R1171x301B R1171x501B
01 45326
Input Voltage V
IN
(V)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
01 45326
Input Voltage V
IN
(V)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
6) Supply Current vs. Temperature
R1171x151B R1171x201B
V
IN
=2.5V
-50 -25 50 75250 100
Temperature Topt(°C)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
V
IN
=3.0V
-50 -25 50 75250 100
Temperature Topt(°C)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
R1171x301B R1171x501B
V
IN
=4.0V
-50 -25 50 75250 100
Temperature Topt(°C)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
V
IN
=6.0V
-50 -25 50 75250 100
Temperature Topt(°C)
0
100
50
150
200
250
300
350
Supply Current I
SS
(μA)
R1171x
15
7) Dropout Voltage vs. Set Output Voltage (Topt=25°C)
R1171Sxx1x R1171Jxx1x
I
OUT
=1500mA
I
OUT
=1000mA
I
OUT
=600mA
I
OUT
=200mA
14325
Set Output Voltage V
SET
(V)
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
Dropout Voltage V
DIF
(V)
I
OUT
=2000mA
I
OUT
=1000mA
I
OUT
=400mA
I
OUT
=200mA
14325
Set Output Voltage V
SET
(V)
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
Dropout Voltage V
DIF
(V)
8) Ripple Rejection vs. Frequency
R1171x151B R1171x201B
IOUT=1mA
IOUT=10mA
IOUT=100mA
IOUT=200mA
IOUT=500mA
0.1 10.01.0 100.0
0
80
60
70
40
50
20
30
10
Ripple Frequency f(kHz)
Ripple Rejection RR(dB)
VIN=2.5V+0.5Vp-p
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=200mA
I
OUT
=500mA
0.1 10.01.0 100.0
0
80
60
70
40
50
20
30
10
Ripple Frequency f(kHz)
Ripple Rejection RR(dB)
V
IN
=3.0V+0.5Vp-p
R1171x301B R1171x501B
IOUT=1mA
IOUT=10mA
IOUT=100mA
IOUT=200mA
IOUT=500mA
0.1 10.01.0 100.0
0
80
60
70
40
50
20
30
10
Ripple Frequency f(kHz)
Ripple Rejection RR(dB)
VIN=4.0V+0.5Vp-p
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=200mA
I
OUT
=500mA
0.1 10.01.0 100.0
0
80
60
70
40
50
20
30
10
Ripple Frequency f(kHz)
Ripple Rejection RR(dB)
V
IN
=5.75V+0.5Vp-p
R1171x
16
9) Ripple Rejection vs. Input Voltage
R1171x301x R1171x301x
3.1 3.43.33.2 3.5
0
80
60
70
40
50
20
30
10
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
=1mA,C
OUT
=4.7μF
f=400Hz
f=1kHz
f=10kHz
3.1 3.43.33.2 3.5
0
80
60
70
40
50
20
30
10
Input Voltage VIN(V)
Ripple Rejection RR(dB)
IOUT=10mA,COUT=4.7μF
f=400Hz
f=1kHz
f=10kHz
R1171x301x R1171x301x
3.1 3.43.33.2 3.5
0
80
60
70
40
50
20
30
10
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
=100mA,C
OUT
=4.7μF
f=400Hz
f=1kHz
f=10kHz
3.1 3.43.33.2 3.5
0
80
60
70
40
50
20
30
10
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
=300mA,C
OUT
=4.7μF
f=400Hz
f=1kHz
f=10kHz
R1171x301x
3.1 3.43.33.2 3.5
0
80
60
70
40
50
20
30
10
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
=500mA,C
OUT
=4.7μF
f=400Hz
f=1kHz
f=10kHz
R1171x
17
10) Input Transient Response (Topt=25°C)
R1171x151B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
1.40
1.50
1.45
1.55
1.60
1.65
1.75
1.70
1.80
0
1.0
0.5
1.5
2.0
2.5
3.5
3.0
4.0
Input Voltage
Output Voltage
tr=tf=5
μ
s, I
OUT
=1000mA, C
OUT
=Ceramic 10
μ
F
R1171x201B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
1.90
2.00
1.95
2.05
2.10
2.15
2.25
2.20
2.30
0.5
1.5
1.0
2.0
2.5
3.0
4.0
3.5
4.5
Input Voltage
Output Voltage
tr=tf=5
μ
s, I
OUT
=1000mA, C
OUT
=Ceramic 4.7
μ
F
R1171x301B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
2.90
2.95
3.00
3.05
3.15
3.10
3.20
1.0
1.5
2.5
2.0
3.0
3.5
4.0
5.0
4.5
5.5
Input Voltage
Output Voltage
tr=tf=5
μ
s, I
OUT
=1000mA, C
OUT
=Ceramic 4.7
μ
F
R1171x
18
R1171x501B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
4.90
5.00
4.95
5.05
5.10
5.15
5.25
5.20
5.30
3.5
4.5
4.0
5.0
5.5
6.0
7.0
6.5
7.5
Input Voltage
Output Voltage
tr=tf=5
μ
s, I
OUT
=1000mA, C
OUT
=Ceramic 4.7
μ
F
11) Load Transient Response (Topt=25°C)
R1171x151B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Output Current I
OUT
(mA)
1.35
1.55
1.50
1.45
1.40
1.60
1.65
1.70
1.80
1.75
1.85
0
1500
500
1000
2000
Output Current
Output Voltage
tr=tf=10
μ
s, VIN=2.5V, COUT=Ceramic 10
μ
F
R1171x201B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Output Current I
OUT
(mA)
1.85
2.05
2.00
1.95
1.90
2.10
2.15
2.20
2.30
2.25
2.35
0
1500
500
1000
2000
Output Current
Output Voltage
tr=tf=10
μ
s, V
IN
=3.0V, C
OUT
=Ceramic 4.7
μ
F
R1171x
19
R1171x301B
080604020 180160140120100 200
Time t(μs)
Output Voltage V
OUT
(V)
Output Current I
OUT
(mA)
2.85
3.05
3.00
2.95
2.90
3.10
3.15
3.20
3.30
3.25
3.35
0
1500
500
1000
2000
Output Current
Output Voltage
tr=tf=10
μ
s, V
IN
=4.0V, C
OUT
=Ceramic 4.7
μ
F
R1171x501B
080604020 180160140120100 200
Time t(μs)
Output Voltage VOUT(V)
Output Current IOUT(mA)
4.85
5.05
5.00
4.95
4.90
5.10
5.15
5.20
5.30
5.25
5.35
0
1500
500
1000
2000
Output Current
Output Voltage
tr=tf=10
μ
s, V
IN
=6.0V, C
OUT
=Ceramic 4.7
μ
F
R1171x
20
Technical Notes on External Components and Typical Application
1. Phase Compensation
In these ICs, phase compensation is made with the output capacitor for securing stable operation even if the
load current is varied. For this purpose, use a capacitor with the capacitance range from 4.7μF to 10.0μF, as CL.
In case that using a tantalum capacitor and the ESR of the tantalum capacitor is too large, unstable operation
may result. Fully evaluation is necessary for the whole circuit with con sid ering the frequency characteristic.
2. Mounting on PCB
Make VDD and GND lines sufficient. If their impedance is high, large current may flow and the pick-up noise or
unstable operation may result. Therefore use a capacitor with a capacitance range from 4.7μF to 10.0μF
between VDD pin and GND pin as close as possible.
Further, set an output capacitor betwee n VOUT pin and GND pin for phase compensation as close as possible.
(Refer to the example of typical application)
IN
V
DD
V
OUT
CE
GND
C
L
C
I
OUT
R1171xxx1B
R1171Sxx1B Typical Application
1.5V
<
=
VOUT<1.8V : CI=10μF (Ceramic),CL=10μF (Ceramic)
1.8V
<
=
VOUT
<
=
5.0V : CI=4.7μF (Ceramic),CL=4.7μF (Ceramic)
3. Output Short Protection Function
In the R1171x Series, the output sho rt protection funct ion is built in, furthe r, if the output is short to the GND or
other voltage line, the chip inside is heating, as a result, in case that the junction temperature becomes equal or
more than 150°C (Typ.), the built-in thermal shutdown circuit works. If the junction temperature becomes equal
or more than 150°C (Typ.), the IC is protected by the output short protection circuit and the thermal shutdown
circuit.
R1171x
21
ESR vs. Output Current (Topt=25°C, VIN=Set Output Voltage+1V, CIN=Ceramic 10μF)
VIN CIN
V
OU
T
CE
R1171xxx1B
COUT Spectrum
A
nalyzer
IOUT
ESR
V
IN
S.A
GND
As an output capacitor for this IC, Ceramic capacitor is recommendable. However, other low ESR type
capacitor can be used with this IC.
For your reference, noise level is tested with the circuit as shown above, and if the noise level is 40μV or less
than 40μV, the ESR values are plotted as stable area. Upper limit i s described in the next four graphs, or ESR vs.
Output Current. (Hatched area is the stable area.)
R1171S151x R1171S151x
0 250 500 750 1000 1250 1500
Output Current IOUT(mA)
0.01
100
1
0.1
10
ESR(Ω)
CIN=COUT=Ceramic 10μF
0 250 500 750 1000 1250 1500
Output Current IOUT(mA)
0.01
100
1
0.1
10
ESR(Ω)
CIN=COUT=Ceramic 4.7μF
R1171x
22
R1171S301x R1171S301x
0 250 500 750 1000 1250 1500
Output Current I
OUT
(mA)
0.01
100
1
0.1
10
ESR(Ω)
C
IN
=C
OUT
=Ceramic 4.7μF
0 250 500 750 1000 1250 1500
Output Current I
OUT
(mA)
0.01
100
1
0.1
10
ESR(Ω)
C
IN
=C
OUT
=Ceramic 2.2μF
R1171S501x R1171S501x
0 250 500 750 1000 1250 1500
Output Current I
OUT
(mA)
0.01
100
1
0.1
10
ESR(Ω)
C
IN
=C
OUT
=Ceramic 4.7μF
0 250 500 750 1000 1250 1500
Output Current IOUT(mA)
0.01
100
1
0.1
10
ESR(Ω)
CIN=COUT=Ceramic 2.2μF
R1171J181x R1171J181x
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
C
IN
=C
OUT
=Ceramic 4.7μF
Output Current I
OUT
(mA)
ESR(Ω)
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
C
IN
=C
OUT
=Ceramic 2.2μF
Output Current I
OUT
(mA)
ESR(Ω)
R1171x
23
R1171J301x R1171J301x
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
C
IN
=C
OUT
=Ceramic 4.7μF
Output Current I
OUT
(mA)
ESR(Ω)
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
C
IN
=C
OUT
=Ceramic 2.2μF
Output Current I
OUT
(mA)
ESR(Ω)
R1171J501x R1171J501x
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
CIN=COUT=Ceramic 4.7μF
Output Current IOUT(mA)
ESR(Ω)
0
250 500 750 1000 1250 1500 1750 2000
0.01
100
1
0.1
10
CIN=COUT=Ceramic 2.2μF
Output Current IOUT(mA)
ESR(Ω)
RICOHCOMPANY,LTD.
ElectronicDevicesCompany
●Higashi-ShinagawaOffice(InternationalSales)
3-32-3,Higashi-Shinagawa,Shinagawa-ku,Tokyo140-8655,Japan
Phone:+81-3-5479-2857Fax:+81-3-5479-0502
RICOHEUROPE(NETHERLANDS)B.V.
●SemiconductorSupportCentre
Prof.W.H.Keesomlaan1,1183DL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
http://www.ricoh.com/LSI/
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.
RICOHCOMPANY.,LTD.ElectronicDevicesCompany
■
Ricoh presented with the Japan Management Quality Award for 1999
.
Ricoh continually strives to promote customer satisfaction, and shares the achievements
of its management quality improvement program with people and society.
■Ricoh awarded ISO 14001 certification.
The Ricoh Group was awarded ISO 14001 certification, which is an international standard for
environmental management systems, at both its domestic and overseas production facilities.
Our current aim is to obtain ISO 14001 certification for all of our business offices.
Ricoh completed the organization of the Lead-free production for all of our products.
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.