Super low On resistance/ Low voltage LDO
R1172x SERIES
1
OUTLINE
The R1172x Series are CMOS-based positive voltage regulator ICs. The R1172x Series have features of
super low dropout, 1A output current capability. Even the output voltage is set at 1.5V, on resistance of internal
FET is typically 0.32
. Therefore, applications that require a large current at small dropout are suitable for the
R1172x series. Low input voltage is acceptable and low output voltage can be set. The minimum input voltage is
1.4V, and the lowest set output voltage is 0.8V. Each of these ICs consists of a voltage reference unit, an error
amplifier, resistor net for setting output voltage, a current limit circuit at over-current, a chip enable circuit, a
thermal-shutdown circuit, and so on. A stand-by mode with ultra low consumption current can be realized with
the chip enable pin. The output voltage of R1172 is fixed in the IC.
Since the packages for these ICs are SOT-23-5, SOT-89-5, HSON-6, and HSOP-6J with high power
dissipation, high density mounting of the ICs on boards is possible.
FEATURES
Ultra-Low Supply Current ............................................. Typ. 60
A
Good Load Regulation ................................................. Typ. 15mV at I
OUT
=300mA, Typ. 50mV at I
OUT
=1A
Low inrush current at turning-on .................................. Typ. 500mA
Minimum Operating Voltage ......................................... Min. 1.4V
Low Standby Current.................................................... Typ. 0.1
A
Output Current.............................................................. Max. 1A
Output Voltage ............................................Stepwise setting with a step of 0.1V in the range of
0.8V to 5.0VExcept HSOP6J type, 0.8V to 3.5V setting is available for HSOP6J
High Output Voltage Accuracy .....................
2.0%
High Power Supply Ripple Rejection .............Typ. 70dB (V
OUT
=3V)
Low Dropout Voltage .................................................... Typ. 0.18V (V
OUT
=
3.0V, I
OUT
=1
A)
........................... Typ. 0.32V (V
OUT
=1.5V/ I
OUT
=1A)
Line Regulation ............................................................ Typ. 0.05%/V
Packages.................................................................. SOT-23-5, SOT-89-5, HSON-6, High power-HSOP-6J
Built-in Current Limit Circuit
Built-in Thermal Shutdown Circuit
Low Temperature-drift Coefficient of Output Voltage ... Typ.
100ppm/
C
Output capacitors ......................................................... C
IN
=C
OUT
=Tantalum 4.7
F(V
OUT
<1.0V)
...................................................................................... C
IN
=C
OUT
=Ceramic 4.7
F(V
OUT
1.0V)
APPLICATIONS
Local Power source for Notebook PC.
Local Power source for portable communication equipments, cameras, and videos.
Local Power source for home appliances.
R1172x
2
BLOCK DIAGRAMS
R1172xxx1A
R1172xxx1B
R1172xxx1D
SELECTION GUIDE
The output voltage, with/without auto-discharge function, the package type, etc. can be selected at the
user's request.
The selection can be made with the part number as follows;
R1172x xx1x-xx
Part Number
a
b
c
d
Code Contents
a
Package Type; N: SOT-23-5, H: SOT-89-5, D: HSON-6, S: HSOP-6J
b
Designation of Output Voltage (V
OUT
)
Fixed Type: 08 to 50 Stepwise setting with 0.1V increment in the range from
0.8V to 5.0V, exceptions; 2.85V output: R1172x281x5-xx, 1.85V output:
R1172x181x5-xx
c
Designation of option;
A: Built-in Chip Enable Circuit, Active at "L", without auto-discharge
B: Built-in Chip Enable Circuit, Active at "H", without auto-discharge
D: Built-in Chip Enable Circuit, Active at "H", with auto-discharge
d
Designation of Taping Type;
T1 or T2 (SOT-89-5), TR (SOT23-5, HSON-6), E2 (HSOP-6J)
(Refer to Taping Specifications)
V
DD
V
OUT
GND
Vref
Current Limit
+
-
CE
V
DD
V
OUT
GND
Vref
Current Limit
+
-
CE
V
DD
V
OUT
GND
Vref
Current Limit
+
-
CE
R1172x
3
PIN CONFIGURATION
z SOT-23-5
z SOT-89-5
z HSON-6
z HSOP-6J
5
4
1.0
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
R
PIN DESCRIPTION
z SOT-23-5
Pin No
Symbol
1 V
OUT
2 GND
3 V
DD
4 NC
5
CE or CE
z SOT-89-5
Pin No
Symbol
1
CE or CE
2 GND
3 NC
4 V
DD
5 V
OUT
1
2
3
4
5
R1172x
4
z HSON-6
Pin No
Symbol
1 V
OUT
2 V
OUT
3
CE or CE
4 GND
5 V
DD
6 V
DD
*The back side tab and tab lead is GND level.
Connect Pin1 and Pin2 as short as possible.
z HSOP-6J
Pin No
Symbol
1 V
OUT
2 GND
3
CE or CE
4 NC
5 GND
6 V
DD
ABSOLUTE MAXIMUM RATINGS
Symbol Item
Rating
Unit
V
IN
Input
Voltage
6.5
V
V
CE
Input Voltage (CE Input Pin)
-
0.3 ~ 6.5
V
V
OUT
Output
Voltage
-
0.3 ~ V
IN
+
0.3
V
I
OUT
Output
Current
1.4
A
P
D
Power Dissipation
Internally limited
Topt Operating
Temperature
-
40 ~ 85
C
Tstg Storage
Temperature
-
55 ~ 125
C
Power Dissipation (SOT89-5)
Power dissipation depends on mounting conditions. The data below is an example.
Measurement Conditions
Mounting on board: Wind velocity=0m/s
Board Material: Glass Epoxy Resin (Double Layers)
Small but High Power Land Pattern
Standard Land Pattern
Board Dimensions
30mm*30mm*1.6mm
40mm*40mm*1.6mm
Top Side Wiring Ratio
20%
Less than 10%
Back Side Wiring Ratio
100%
100%
Thermal via holes
Diameter 0.85mm * 10
-
R1172x
5
Measurement Result:
Small but High Power Land Pattern
Standard Land Pattern
Power Dissipation
1300mW(Topt=25
C, Tjmax=125
C) 900mW(Topt=25
C, Tjmax=125
C)
Thermal Resistance
77
C/W
111
C/W
Power Dissipation (HSON-6)
Power dissipation depends on mounting conditions, the data below is an example.
Measurement Conditions
Mounting on board: Wind velocity=0m/s
Board Material: Glass Epoxy Resin (Double Layers)
Board Dimensions: 40mm*40mm*1.6mm
Wiring Ratio: 50%
* Measurement Result:
Power Dissipation: 900mW (Topt=25
C, Tjmax=125
C)
Thermal Resistance 111
C/W
Power Dissipation (SOT-89-5)
0
300
600
900
1200
1500
0
25
50
75
100
125
150
Temperature Topt(
C)
Power
Di
ssi
pat
i
on Pd(
m
W)
1300mW
900mW
R1172x
6
Power Dissipation (HSOP-6J)
Measurement Conditions
High PD Land Pattern
Standard Land Pattern
Environment
Mounting on Board (Wind velocity=0m/s)
Mounting on Board (Wind velocity=0m/s)
Board Material Glass Epoxy Resin (Double Layer type)
Glass Epoxy Resin (Double Layer type)
Board Dimensions
50mm*50mm*1.6mm 50mm*50mm*1.6mm
Wiring Ratio
90%
50%
Thermal via hole
Diameter: 0.5mm*24pieces
Diameter: 0.5mm*24pieces
Measurement Results
High PD Land Pattern
Standard Land Pattern
Power Dissipation
2000mW (Topt=25
C, Tjmax=125
C)
1700mW
(Topt=25
C, Tjmax=125
C)
Thermal Resistance
50
C/W 59
C/W
Power Dissipation (HSON-6)
0
200
400
600
800
1000
0
25
50
75
100
125
150
Temperature Topt (
C)
Po
we
r
Di
s
s
i
p
a
t
i
o
n
Pd
(
m
W)
R1172x
7
Power Dissipation (HSOP-6J
0
500
1000
1500
2000
2500
0
25
50
75
100
125
150
Temperature Topt(
C)
Po
we
r
Di
s
s
i
p
a
t
i
o
n
Pd
(
m
W)
2000mW
1700mW
R1172x
8
ELECTRICAL CHARACTERISTICS
R1172xxxxA
Topt
=
25
C
Symbol Item
Conditions
Min.
Typ.
Max.
Unit
V
IN
Input
Voltage
1.4
6.0 V
I
SS1
Supply
Current1
V
IN
-
V
OUT
=
1.0V, V
CE
=0
V
60
100
A
Istb Standby
Current
V
IN
=6.0
V, V
CE
=
V
IN
0.1 1.0
A
V
OUT
>1.5V
0.98
1.02
V
V
OUT
Output
voltage
V
IN
-
V
OUT
=
1.0V
I
OUT
=
100mA
V
OUT
1.5V
-30
+30
mV
I
OUT1
Output
Current
V
IN
-
V
OUT
=
1.0V
1000
mA
V
IN
-
V
OUT
=0
.3V
1mA
I
OUT
<
=
300mA
If V
OUT
1.1V, then V
IN
=1.4V
-15
15 30
V
OUT
/
I
OUT
Load regulation
V
IN
-
V
OUT
=0
.3V
1mA
I
OUT
<
=
1000mA
If V
OUT
1.1V, then V
IN
=1.7V
50
mV
V
DIF
Dropout Voltage
Refer to Dropout Voltage Characteristics Table by Output Voltage
V
OUT
/
V
IN
Line regulation
I
OUT
=
100mA
V
OUT
+
0.5V
<
=
V
IN
<
=
6.0V
If V
OUT
0.9V
1.4V
<
=
V
IN
<
=
6.0V
0.05
0.20
%/V
RR Ripple
Rejection
f
=
1kHz(V
OUT
4.0V)
V
OUT
>4.0V
Ripple 0.5Vp
-
p, I
OUT
=100mA
V
IN
-
V
OUT
=
1.0V
If V
OUT
<
=
1.2V: V
IN
-
V
OUT
=1
.5V
70
60
dB
V
OUT
/
T
Output Voltage
Temperature Coefficient
I
OUT
=
100mA
-
40
C
<
=
Topt
<
=
85
C
100
ppm/
C
I
LIM
Short Current Limit
V
OUT
=
0V
250 mA
R
PD
Pull-down resistance for CE pin
1.9
5.0
15.0
M
V
CEH
CE Input Voltage "H"
1.0
6.0
V
V
CEL
CE Input Voltage "L"
0.0
0.4
V
T
TSD
Thermal Shutdown Detector
Threshold Temperature
Junction Temperature
150
C
T
TSR
Thermal Shutdown
Released Temperature
Junction Temperature
120
C
e
n
Output Noise
BW=10Hz to 100kHz
30
Vrms
R1172x
9
R1172xxxxB/D
Topt
=
25
C
Symbol Item
Conditions
Min.
Typ.
Max.
Unit
V
IN
Input Voltage
1.4 6.0 V
I
SS
Supply Current
V
IN
-
V
OUT
=
1.0V, V
CE
=
V
IN
60
100
A
Istb
Standby Current
V
IN
=
6.0V,V
CE
=
GND
0.1
1.0
A
V
OUT
>1.5V
0.98
1.02
V
V
OUT
Output Voltage
V
IN
-
V
OUT
=
1.0V
I
OUT
=
100mA
V
OUT
1.5V
-30
+30
mV
I
OUT
Output Current
V
IN
-
V
OUT
=
1.0V
1000 mA
V
IN
-
V
OUT
=0
.3V
1mA
<
=
I
OUT
<
=
300mA
If V
OUT
1.1V, then V
IN
=1.4V
-15 15 30 mV
V
OUT
/
I
OUT
Load regulation
V
IN
-
V
OUT
=0
.3V
1mA
<
=
I
OUT
<
=
1000mA
If V
OUT
1.1V, then V
IN
=1.7V
50 mV
V
DIF
Dropout Voltage
Refer to Dropout Voltage Characteristics Table by Output Voltage
V
OUT
/
V
IN
Line regulation
I
OUT
=
100mA
V
OUT
+
0.5V
<
=
V
IN
<
=
6.0V
If V
OUT
0.9V
1.4V
<
=
V
IN
<
=
6.0V
0.05
0.20
%/V
RR Ripple
Rejection
f
=
1kHz(V
OUT
4.0V)
V
OUT
>4.0V
Ripple 0.5Vp
-
p, I
OUT
=100mA
V
IN
-
V
OUT
=
1.0V
If V
OUT
<
=
1.2V: V
IN
-
V
OUT
=1
.5V
70
60
dB
V
OUT
/
T
Output Voltage
Temperature Coefficient
-
40
C
<
=
Topt
<
=
85
C,
I
OUT
=100mA
100
ppm/
C
I
LIM
Short Current Limit
V
OUT
=
0V
250 mA
R
PD
Pull-down resistance for CE pin
1.9 5.0 15.0 M
V
CEH
CE Input Voltage "H"
1.0 6.0 V
V
CEL
CE Input Voltage "L"
0.0 0.4 V
T
TSD
Thermal Shutdown
Detector Threshold
Temperature
Junction
Temperature
150
C
T
TSR
Thermal Shutdown
Released Temperature
Junction
Temperature
120
C
e
n
Output Noise
BW=10Hz to 100kHz
30
Vrms
R1172x
10
Dropout Voltage by Output Voltage (Topt=25
C)
Technical Notes on External Components and Typical Application
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 as C
L
. Recommendation value is as follows:
Output Voltage
CL recommendation value
Components Recommendation
V
OUT
1.0V
Tantalum 4.7
F or more
1.0
V
OUT
3.3V Ceramic
4.7
F or more
Kyocera
4.7uF(1608)
{
Part Number: CM105X5R475M06AB
Murata
4.7uF(1608)
Part Number: GRM188R60J475KE19B
Murata
10uF(1608)
Part Number: GRM188B30G106ME46B
3.3V
V
OUT
Ceramic
4.7
F or more
Kyocera
4.7uF(thin 2012) Part Number: CT21X5R475M06AB
Murata
4.7uF(1608)
Part Number: GRM188R60J475KE19B
Murata
10uF(1608)
Part Number: GRM188B30G106ME46B
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 actual using capacitors.
Mounting on PCB
Make V
DD
and GND lines sufficient. If their impedance is high, a current flows, the noise picked up or unstable
operation may result. Further use a 4.7F or more value capacitor between V
DD
pin and GND pin as close as
possible.
Set an Output capacitor between V
OUT
pin and GND pin for phase compensation as close as possible.
(Refer to the example of typical application)
Example of the typical application of R1172
Dropout Voltage (V)
Output Voltage V
OUT
(V)
I
OUT
=300mA I
OUT
=1000mA
Typ. Max.
Typ.
0.8
V
OUT
<0
.9
0.33 0.57
0.72
0.9
V
OUT
<
1.0
0.22 0.47
0.64
1.0
V
OUT
<
1.5
0.18 0.32
0.56
1.5
<
=
V
OUT
<2.6 0.10
0.15 0.32
2.6
<
=
V
OUT
0.05
0.10 0.18
C1
C2
V
IN
V
I
OUT
*
1
VDD
OUT
CE
GND
R11 72
SERIES
*
1 R1172XXX1A:
CE = GND
R1172XXX1B:
CE = VDD
R1172x
11
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current (Topt
=
=
=
=
25C)
R1172X081X R1172X151X
R1172X301X
R1172X401X R1172X501X
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0
500
1000
1500
2000
Output Current I
OUT
[mA]
Out
put
V
o
l
t
age V
OU
T
[V]
Vdd=1.4V
Vdd=1.5V
Vdd=1.6V
Vdd=2.0V
Vdd=2.8V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
500
1000
1500
2000
Output Current I
OUT
[mA]
Out
put
V
o
l
t
age V
OU
T
[V]
Vdd=1.8V
Vdd=2.5V
Vdd=3.5V
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
0
500
1000
1500
2000
Output Current I
OUT
[mA]
Out
put
V
o
l
t
age V
OU
T
[V]
Vdd=3.3V
Vdd=4.0V
Vdd=5.0V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
500
1000
1500
2000
Output Current I
OUT
[mA]
Out
put
V
o
l
t
age V
OUT
[V]
Vdd=4.3V
Vdd=5.0V
Vdd=6.0V
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
500
1000
1500
2000
Output Current I
OUT
[mA]
Out
put
V
o
l
t
age V
OUT
[V]
Vdd=5.3V
Vdd=6.0V
R1172x
12
2) Output Voltage vs. Input Voltage (Topt
=
=
=
=
25C)
R1172X081X R1172X151X
R1172X301X R1172X401X
R1172X501X
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
O
u
tput Voltage V
OUT
[V]
Iout=1mA
Iout=50mA
Iout=99mA
Iout=300mA
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
Out
put
V
o
l
t
age V
OUT
[V]
Iout=1mA
Iout=50mA
Iout=99mA
Iout=300mA
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
Out
put
V
o
l
t
age V
OU
T
[V]
Iout=1mA
Iout=50mA
Iout=99mA
Iout=300mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
Out
put
V
o
l
t
age V
OUT
[V]
Iout=1mA
Iout=50mA
Iout=99mA
Iout=300mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
Out
put
V
o
l
t
age V
OUT
[V]
Iout=1mA
Iout=50mA
Iout=99mA
Iout=300m
A
R1172x
13
3) Dropout Voltage vs. Output Current (Topt
=
=
=
=
25C)
R1172X081X R1172X151X
R1172X301X R1172X401X
R1172X501X
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
S
uppl
y
Current
I
SS
[
A]
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
S
uppl
y
Current
I
SS
[
A]
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
S
uppl
y
Current
I
SS
[
A]
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
S
uppl
y
Current
I
SS
[
A]
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
Input Voltage V
IN
[V]
S
uppl
y
Current
I
SS
[
A]
R1172x
14
4) Output Voltage vs. Temperature (I
OUT
=100mA)
R1172X081X (V
IN
=1.8V) R1172X151X
(V
IN
=2.5V)
R1172X301X (V
IN
=4.0V) R1172X501X
(V
IN
=6.0V)
5) Supply Current vs. Temperature
R1172X081X (V
IN
=1.8V) R1172X151X
(V
IN
=2.5V)
0.76
0.77
0.78
0.79
0.8
0.81
0.82
0.83
-50
-25
0
25
50
75
100
Temperature Topt[
C]
Out
put
Vol
t
age V
OUT
[V
]
1.46
1.47
1.48
1.49
1.5
1.51
1.52
1.53
-50
-25
0
25
50
75
100
Temperature Topt[
C]
Out
put
Vol
t
age V
OUT
[V
]
2.92
2.94
2.96
2.98
3
3.02
3.04
3.06
-50
-25
0
25
50
75
100
Temperature Topt[
C]
O
u
tput V
o
ltage V
OU
T
[V
]
4.88
4.9
4.92
4.94
4.96
4.98
5
5.02
-50
-25
0
25
50
75
100
Temperature Topt[
C]
O
u
tput V
o
ltage V
OUT
[V
]
0
10
20
30
40
50
60
70
80
-50
-25
0
25
50
75
100
Temperature Topt[
C]
S
upply
C
u
r
r
ent I
SS
[
A]
0
10
20
30
40
50
60
70
80
-50
-25
0
25
50
75
100
Temperature Topt[C]
S
upply
C
u
r
r
ent I
SS
[
A]
R1172x
15
R1172X301X (V
IN
=4.0V) R1172X501X
(V
IN
=6.0V)
6) Dropout Voltage vs. Output Current
R1172X081X R1172X091X
R1172X101X
R1172X151X
0
10
20
30
40
50
60
70
80
-50
-25
0
25
50
75
100
Temperature Topt[
C]
Suppl
y Cur
r
ent
I
SS
[
A]
0
10
20
30
40
50
60
70
80
-50
-25
0
25
50
75
100
Temperature Topt[
C]
Suppl
y Cur
r
ent
I
SS
[
A]
0
100
200
300
400
500
600
700
800
0
200
400
600
800
1000
Output Current I
OUT
[mA]
Dropout
V
o
l
t
age V
DI
F
[mV]
85C
25C
-40C
0
100
200
300
400
500
600
700
0
200
400
600
800
1000
Output Current I
OUT
[mA]
D
r
opout V
o
ltage V
DIF
[m
V]
85C
25C
-40C
0
50
100
150
200
250
300
350
400
0
200
400
600
800
1000
Output Current I
OUT
[mA]
D
r
opout V
o
ltage V
DIF
[m
V
]
85C
25C
-40C
0
100
200
300
400
500
600
0
200
400
600
800
1000
Output Current I
OUT
[mA]
D
r
opout V
o
ltage V
DI
F
[m
V]
85C
25C
-40C
R1172x
16
R1172X301X R1172X501X
7) Dropout Voltage vs. Set Output Voltage 8) 0.8V Output type, Operating Input Voltage Range
R1172XXX1X R1172X081X
9) Ripple Rejection vs. Input Bias
R1172X301X (V
IN
=4.0V
DC
+0.2Vp-p, I
OUT
=1mA) R1172X301X
(V
IN
=4.0V
DC
+0.5Vp-p, I
OUT
=1mA)
0
50
100
150
200
250
0
200
400
600
800
1000
Output Current I
OUT
[mA]
Dropout
V
o
l
t
age V
DI
F
[mV]
85C
25C
-40C
0
20
40
60
80
100
120
140
160
180
200
0
200
400
600
800
1000
Output Current I
OUT
[mA]
D
r
opout V
o
ltage V
DI
F
[m
V]
85
25
-40
0
100
200
300
400
500
600
700
800
0
1
2
3
4
5
Set Output Voltage V
REG
[V]
Dropout
V
o
l
t
age V
DI
F
[mV]
100mA
200mA
400mA
600mA
800mA
1000mA
0.8
1
1.2
1.4
1.6
1.8
0
200
400
600
800
1000
Output Current I
OUT
[mA]
Input V
o
ltage V
IN
[V]
Operating Input Voltage Range
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
ppl
e Rej
e
c
t
i
o
n
RR[
dB
]
200Hz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
ppl
e Rej
e
c
t
i
o
n
RR[
d
B
]
200Hz
1kHz
10kHz
100kHz
R1172x
17
R1172X301X (V
IN
=4.0V
DC
+0.2Vp-p, I
OUT
=10mA) R1172X301X
(V
IN
=4.0V
DC
+0.5Vp-p, I
OUT
=10mA)
R1172X301X (V
IN
=4.0V
DC
+0.2Vp-p, I
OUT
=100mA) R1172X301X
(V
IN
=4.0V
DC
+0.5Vp-p, I
OUT
=100mA)
10) Ripple Rejection vs. Frequency
R1172X081X (VIN
=1.8V
DC
+0.5Vp-p, C
OUT
=Tantalum 4.7
F)
R1172X101X (VIN
=2.0V
DC
+0.5Vp-p, C
OUT
=Ceramic 4.7
F)
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
p
p
l
e
Re
j
e
c
t
i
o
n
RR[
d
B
]
200Hz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
p
p
l
e
Re
j
e
cti
o
n
RR[d
B
]
200Hz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
p
p
l
e
Re
j
e
c
t
i
o
n
RR[d
B
]
200Hz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
3.000
3.100
3.200
3.300
3.400
3.500
Input Voltage V
IN
[V]
Ri
p
p
l
e
Re
j
e
cti
o
n
RR[d
B
]
200Hz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Frequency f[kHz]
Ri
ppl
e Rej
e
ct
i
o
n
RR[
dB]
IOUT=1mA
IOUT=30mA
IOUT=100mA
0
10
20
30
40
50
60
70
80
90
0.1
1
10
100
Frequency f[kHz]
Ri
p
p
l
e
Re
j
e
c
t
i
o
n
RR[d
B
]
IOUT=1mA
IOUT=30mA
IOUT=100mA
R1172x
18
R1172X301X (VIN
=4.0V
DC
+0.5Vp-p, C
OUT
=Ceramic 4.7
F)
R1172X401X (VIN
=5.0V
DC
+0.5Vp-p, C
OUT
=Ceramic 4.7
F)
R1172X451X (VIN
=5.5V
DC
+0.5Vp-p, C
OUT
=Ceramic 4.7
F)
R1172X501X (VIN
=6.0V
DC
+0.5Vp-p, C
OUT
=Ceramic 4.7
F)
11) Line Transient Response (Tr = Tf =5
s, I
OUT
=100mA)
R1172X081X (C
OUT
=Tantalum 4.7
F)
R1172X101X (C
OUT
=Ceramic 4.7
F)
0
10
20
30
40
50
60
70
80
90
0.1
1
10
100
Frequency f[kHz]
Ri
p
p
l
e
Re
j
e
c
t
i
o
n
RR[
d
B
]
IOUT=1mA
IOUT=30mA
IOUT=100mA
0
10
20
30
40
50
60
70
80
90
0.1
1
10
100
Frequency f[kHz]
Ri
ppl
e Rej
e
ct
i
o
n
RR[
dB]
IOUT=1mA
IOUT=30mA
IOUT=100mA
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Frequency f[kHz]
Ri
ppl
e Rej
e
c
t
i
o
n
RR[
d
B
]
IOUT=1mA
IOUT=30mA
IOUT=100mA
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Frequency f[kHz]
Ri
p
p
l
e
Re
j
e
c
t
i
o
n
RR[
d
B
]
IOUT=1mA
IOUT=30mA
IOUT=100mA
0.76
0.78
0.8
0.82
0.84
0.86
0.88
0.9
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput V
o
ltage V
OUT
[V
]
-3
-2
-1
0
1
2
3
4
Input V
o
ltage V
IN
[V
]
0.96
0.98
1
1.02
1.04
1.06
1.08
1.1
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput V
o
ltage V
OUT
[V]
-3
-2
-1
0
1
2
3
4
Input V
o
ltage V
IN
[V]
Input Voltage
Output Voltage
Input Voltage
Output Voltage
R1172x
19
R1172X301X (C
OUT
=Ceramic 4.7
F)
R1172X501X (C
OUT
=Ceramic 4.7
F)
12) Load Transient Response (Tr=Tf=500ns)
R1172X081X (V
IN
=1.8V, C
IN
=C
OUT
=Tantalum 4.7
F)
R1172X081X (V
IN
=1.8V, C
IN
=C
OUT
=Tantalum 4.7
F)
R1172X081X (V
IN
=1.8V, C
IN
=C
OUT
=Tantalum 4.7
F)
R1172X081X (VIN=1.8V,CIN=Tantalum4.7
F, COUT=Tantalum10
F)
4.94
4.97
5
5.03
5.06
5.09
5.12
5.15
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
Out
put
V
o
l
t
age V
OUT
[V]
0
1
2
3
4
5
6
7
I
nput
V
o
l
t
age V
IN
[V]
2.94
2.97
3
3.03
3.06
3.09
3.12
3.15
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
Out
put
V
o
l
t
age V
OUT
[V]
-1
0
1
2
3
4
5
6
I
nput
V
o
l
t
age V
IN
[V]
Input Voltage
Output Voltage
Input Voltage
Output Voltage
0.68
0.74
0.8
0.86
0.92
0.98
1.04
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput V
o
ltage V
OUT
[V
]
-600
-400
-200
0
200
400
600
O
u
tput C
u
rrent I
OUT
[m
A
]
Output Voltage
Output Current
0.76
0.8
0.84
0.88
0.92
0.96
1
0
2
4
6
8 10 12 14 16 18 20
Time T[s]
O
u
tput V
o
ltage V
OUT
[V
]
-150
-100
-50
0
50
100
150
O
u
tput C
u
rrent I
OUT
[m
A
]
Output Current
Output Voltage
0.76
0.8
0.84
0.88
0.92
0.96
1
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
Output Vol
t
age V
OU
T
[V]
-80
-60
-40
-20
0
20
40
Output Cur
r
ent I
OU
T
[mA]
Output Voltage
Output Current
0.76
0.8
0.84
0.88
0.92
0.96
1
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput V
o
ltage V
OUT
[V]
-80
-60
-40
-20
0
20
40
O
u
tput C
u
rrent I
OUT
[mA]
Output
Current
Output
Voltage
R1172x
20
R1172X101X (V
IN
=2.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
R1172X101X (VIN=2.0V, CIN=Ceramic 4.7
F, COUT
= Ceramic 10
F)
R1172X101X (V
IN
=2.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
R1172X101X (VIN=2.0V, CIN=Ceramic 4.7
F, COUT
= Ceramic 10
F)
R1172X101X (V
IN
=2.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
R1172X101X (VIN=2.0V, CIN=Ceramic 4.7
F, COUT
= Ceramic 10
F)
0.8
0.9
1
1.1
1.2
1.3
1.4
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
Out
put
V
o
l
t
age V
OUT
[V]
-600
-400
-200
0
200
400
600
Out
put
Current
I
OUT
[mA]
Output
Current
Output
Voltage
0.8
0.9
1
1.1
1.2
1.3
1.4
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
Out
put
V
o
l
t
age V
OUT
[V]
-600
-400
-200
0
200
400
600
Out
put
Current
I
OUT
[mA]
Output
Current
Output
Voltage
0.96
1
1.04
1.08
1.12
1.16
1.2
0
4
8 12 16 20 24 28 32 36 40
Time T[s]
Out
put
Vol
t
age V
OUT
[V
]
-150
-100
-50
0
50
100
150
Out
put
Cur
r
ent
I
OUT
[m
A
]
Output
Current
Output
Voltage
0.96
1
1.04
1.08
1.12
1.16
1.2
0
2
4
6
8
10 12 14 16 18 20
Time T[s]
output V
o
ltage V
OUT
[V
]
-150
-100
-50
0
50
100
150
O
u
tput C
u
rrent I
OUT
[m
A
]
Output
Current
Output
Voltage
0.9
0.95
1
1.05
1.1
1.15
1.2
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput Voltage V
OUT
[V]
-80
-60
-40
-20
0
20
40
O
u
tput C
u
rrent I
OUT
[mA]
Output
Current
Output
Voltage
0.9
0.95
1
1.05
1.1
1.15
1.2
0
10 20 30 40 50 60 70 80 90 100
Time T[s]
O
u
tput V
o
ltage V
OUT
[V
]
-80
-60
-40
-20
0
20
40
O
u
tput C
u
rrent I
OUT
[m
A
]
Output
Current
Output
Voltage
R1172x
21
R1172X301X (V
IN
=4.0V, C
IN
=C
OUT
=Ceramic 4.7
F) R1172X301X
(V
IN
=4.0V, C
IN
=Ceramic 4.7
F, C
OUT
= Ceramic
10
F)
R1172X301X (V
IN
=4.0V, C
IN
=C
OUT
=Ceramic 4.7
F) R1172X301X
(V
IN
=4.0V, C
IN
=Ceramic 4.7
F, C
OUT
= Ceramic
10
F)
R1172X301X (V
IN
=4.0V, C
IN
=C
OUT
=Ceramic 4.7
F) R1172X301X
(V
IN
=4.0V, C
IN
=Ceramic 4.7
F, C
OUT
= Ceramic
10
F)
2.6
2.8
3
3.2
3.4
3.6
3.8
0
40 80 120 160 200 240 280 320 360 400
Time T[s]
Output V
o
ltage V
OUT
[V]
-600
-400
-200
0
200
400
600
Output C
u
rrent I
OUT
[mA]
Output
Current
Output
Voltage
2.6
2.8
3
3.2
3.4
3.6
3.8
0
40
80 120 160 200 240 280 320 360 400
Time T[s]
Out
put
V
o
l
t
age V
OU
T
[V]
-600
-400
-200
0
200
400
600
Out
put
Current
I
OU
T
[mA]
Output
Current
Output
Voltage
2.96
3
3.04
3.08
3.12
3.16
3.2
0
4
8 12 16 20 24 28 32 36 40
Time T[s]
O
u
tput V
o
ltage V
OUT
[V]
-150
-100
-50
0
50
100
150
O
u
tput C
u
rrent I
OUT
[mA]
Output
Current
Output
Voltage
2.96
3
3.04
3.08
3.12
3.16
3.2
0
2
4
6
8
10 12 14 16 18 20
Time T[s]
O
u
tput V
o
ltage V
OUT
[V]
-150
-100
-50
0
50
100
150
O
u
tput C
u
rrent I
OUT
[m
A]
Output
Current
Output
Voltage
2.9
2.95
3
3.05
3.1
3.15
3.2
0
40 80 120 160 200 240 280 320 360 400
Time T[s]
Out
put
Vol
t
age V
OUT
[V
]
-80
-60
-40
-20
0
20
40
Out
put
Cur
r
ent
I
OUT
[m
A
]
Output
Current
Output
Voltage
2.9
2.95
3
3.05
3.1
3.15
3.2
0
40 80 120 160 200 240 280 320 360 400
Time T[s]
Out
put
Vol
t
age V
OUT
[V
]
-80
-60
-40
-20
0
20
40
Out
put
Cur
r
ent
I
OUT
[m
A
]
Output
Current
Output
Voltage
R1172x
22
R1172X501X (V
IN
=6.0V, C
IN
=C
OUT
=Ceramic 4.7
F) R1172X501X
(V
IN
=6.0V, C
IN
=C
OUT
= Ceramic 4.7
F)
R1172X501X (V
IN
=6.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
13) Turn-on speed with CE pin control
R1172X081X (V
IN
=1.8V, C
IN
=C
OUT
=Tantalum 4.7
F)
R1172X501X (V
IN
=6.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
4.5
4.75
5
5.25
5.5
5.75
6
0
40 80 120 160 200 240 280 320 360 400
Time T[s]
O
u
tput V
o
ltage V
OUT
[V]
-600
-400
-200
0
200
400
600
O
u
tput C
u
rrent I
OUT
[m
A]
Output
Current
Output
Voltage
4.96
5
5.04
5.08
5.12
5.16
5.2
0
2
4
6
8 10 12 14 16 18 20
Time T[s]
O
u
tput V
o
ltage V
OUT
[V
]
-150
-100
-50
0
50
100
150
O
u
tput C
u
rrent I
OUT
[m
A
]
Output
Voltage
Output
Current
4.9
4.95
5
5.05
5.1
5.15
5.2
0
40 80 120 160 200 240 280 320 360 400
Time T[s]
O
u
tput V
o
ltage V
OU
T
[V]
-80
-60
-40
-20
0
20
40
O
u
tput C
u
rrent I
OU
T
[m
A]
Output
Current
Output
Voltage
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
-20 0
20 40 60 80 100 120 140 160 180
Time T[s]
Out
put
V
o
l
t
age V
OUT
[V]
-2.0
-1.6
-1.2
-0.8
-0.4
0.0
0.4
0.8
1.2
1.6
2.0
CE
I
nput
V
o
l
t
age V
CE
[V]
IOUT=0mA
IOUT=100mA
IOUT=300mA
VCE
-2
0
2
4
6
8
10
-40
60
160
260
360
Time T[s]
Out
put
Vol
t
age V
OUT
[V
]
-4
-2
0
2
4
6
8
CE I
nput
Vol
t
age V
CE
[V
]
IOUT=0mA
IOUT=100mA
IOUT=300mA
Vin (V)
R1172x
23
14) Turn-off speed with CE pin control
R1172X081D (V
IN
=1.8V, C
IN
=C
OUT
=Tantalum 4.7
F)
R1172X501D (V
IN
=6.0V, C
IN
=C
OUT
=Ceramic 4.7
F)
15) Inrush Current (I
OUT
=100mA, C
IN
=none)
R1172X081X (V
IN
=2.0V, C
OUT
=Tantalum 4.7
F)
R1172X081X (V
IN
=2.0V, C
OUT
=Tantalum 10
F)
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-0.4
0.6
1.6
2.6
3.6
Time T[ms]
Out
put
Vol
t
age V
OUT
[V
]
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2
CE I
nput
Vol
t
age V
CE
[V
]
IOUT=0mA
IOUT=100mA
IOUT=300mA
Vin (V)
-2
0
2
4
6
8
10
12
14
-0.2
0.2
0.6
1
1.4
1.8
Time T[ms]
output V
o
ltage V
OU
T
[V
]
-8
-6
-4
-2
0
2
4
6
8
C
E
Input V
o
ltage V
CE
[V
]
IOUT=0mA
IOUT=100mA
IOUT=300mA
Vin (V)
-4
-3.2
-2.4
-1.6
-0.8
0
0.8
1.6
2.4
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
I
n
rus
h
Current
V
dd (m
A
)
Output
Voltage
CE Input Voltage
Inrush
Current
-4
-3.2
-2.4
-1.6
-0.8
0
0.8
1.6
2.4
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
I
n
rus
h
Current
I
v
dd (m
A
)
CE Input Voltage
Output
Voltage
Inrush
Current
R1172x
24
R1172X301X (V
IN
=4.0V, C
OUT
=Ceramic 4.7
F)
R1172X301X (V
IN
=4.0V, C
OUT
=Ceramic 10
F)
R1172X501X (V
IN
=6.0V, C
OUT
=Ceramic 4.7
F)
R1172X501X (V
IN
=6.0V, C
OUT
=Ceramic 10
F)
-5
-4
-3
-2
-1
0
1
2
3
4
5
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
1600
1800
I
n
rus
h
Current
I
v
dd (m
A
)
CE Input Voltage
Output
Voltage
Inrush
Current
-5
-4
-3
-2
-1
0
1
2
3
4
5
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
1600
1800
I
n
rus
h
Current
I
v
dd (m
A
)
CE Input Voltage
Output
Voltage
Inrush
Current
-10
-8
-6
-4
-2
0
2
4
6
8
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
1600
I
n
rus
h
Current
I
v
dd (m
A
)
CE Input Voltage
Output
Voltage
Inrush
Current
-10
-8
-6
-4
-2
0
2
4
6
8
-40
0
40
80
120
160
Time t (us)
CE
V
o
l
t
age V
c
e,
Out
put
V
o
l
t
age
V
out
(V
)
-200
0
200
400
600
800
1000
1200
1400
1600
In
r
u
sh
C
u
r
r
e
n
t
Ivd
d
(
m
A)
CE Input Voltage
Output
Voltage
Inrush
Current
R1172x
25
16)
Stable Area: ESR limit vs. Load current (C
OUT
:0.8V to 3.3V Output type: 4.7
F (Kyocera CM105X5R475M06AB)
5.0V Output type: 4.7
F(Kyocera CT21X5R475K06AB)
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, and if the noise level is 40
V or less than 40
V, the ESR values are plotted as
stable area. Upper limit is described in the next five graphs, or ESR vs. Output Current. (Hatched area is the stable area.)
R1172X081X (VIN
=1.4V to 6.0V, C
IN
= C
OUT
= Ceramic
4.7
F)
R1172X081X (V
IN
=1.4V to 6.0V, C
IN
= Ceramic 4.7
F, C
OUT
=
Ceramic 10
F)
R1172X101X (VIN=1.4V to 6.0V, CIN = COUT = Ceramic 4.7
F)
R1172X301X (VIN=3.1V to 6.0V, CIN = COUT = Ceramic 4.7
F)
R1172X501X (VIN=5.3V to 6.0V, CIN = COUT = Ceramic 4.7
F)
0.01
0.1
1
10
100
0
200
400
600
800
1000
Load Current I
OUT
[mA]
ESR
[
]
Topt=85
C
Topt=-40
C
0.01
0.1
1
10
100
0
200
400
600
800
1000
Load Current I
OUT
[mA]
ESR
[
]
Topt=85
C
Topt=-40
C
0.01
0.1
1
10
100
0
200
400
600
800
1000
Load Current I
OUT
[mA]
ESR
[
]
Topt=-40
C
Topt=85
C
0.01
0.1
1
10
100
0
200
400
600
800
1000
Load Current I
OUT
[mA]
ESR
[
]
Topt=85
C
Topt=-40
C
0.01
0.1
1
10
100
0
200
400
600
800
1000
Load Current I
OUT
[mA]
ESR
[
]
Topt=85
C
Topt=-40
C
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