2003. Mar. 10
800mA LDO REGULATOR
R1170X series
Rev. 1.13 - 1 -
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I OUTLINE
The R1170 Series are positive voltage regulator ICs by CMOS process. The R1170 Series have features of
high ripple rejection, 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 thermal-shunt circuit. Output Voltage of R1170 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 prolong the battery life. These regulators are remarkable improvement
on the current regulators in terms of ripple rejection, input transient response, and load transient response.
Maximum Output Current is large for its compact size.
Thus, the R1170 Series are suitable for various power sources for portable appliances.
Since the packages for these ICs are the SOT-89-5 package, HSON6, or HSOP-6J (Under Development),
high density mounting of the ICs on boards is possible.
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I FEATURES
GUltra-Low Supply Current
Typ. 80A
GLow Standby Current
Typ. 0.1A
GOutput Current
Min. 800mA(V
IN
=V
OUT
+1.0V)
GOutput Voltage
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V
GHigh Output Voltage Accuracy
2.0%
GLow Dropout Voltage
Typ. 0.12V(V
OUT
=3.0V, I
OUT
=300mA)
GLine Regulation
Typ. 0.05%/V
GSmall Package
SOT-89-5, HSON6, HSOP-6J (Under Development)
GBuilt-in Current Limit Circuit
GBuilt-in Thermal Shunt Circuit
GLow Temperature-drift Coefficient of Output Voltage
Typ.
100ppm/C
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I APPLICATIONS
GLocal Power source for Notebook PC.
GLocal Power source for portable appliances, cameras, and videos.
GLocal Power source for equipment of battery-use.
GLocal Power source for home appliances.
Rev. 1.13 - 2 -
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I BLOCK DIAGRAMS
R1170H Series
R1170D Series
Vref
1
4
5
2
Current Limit
-
+
V
DD
CE
V
OUT
GND
V
DD
V
DD
Vref
3
6
1
4
Current Limit
-
+
CE
V
OUT
GND
5
2
V
OUT
R1170S Series
V
V
V
V
DD
DD
DD
DD
N
N
N
NC
C
C
C
Vref
3
6
1
5
Limit Circuit
-
+
CE
CE
CE
CE
V
V
V
V
OUT
OUT
OUT
OUT
GND
GND
GND
GND
4
2
GND
GND
GND
GND
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I SELECTION GUIDE
The output voltage, the chip-enable polarity, the taping type can be selected at the user's request. The selection
can be made with the part number as follows;
R1170X XXXX-XX
Part Number
a b c d
Code
Contents
a
Package Type; H: SOT89-5, D: HSON-6P, S:HSOP-6J(Under Development)
b
Designation of Output Voltage(V
OUT
)
Stepwise setting with 0.1V increment in the range from 1.5V to 5.0V
c
Designation of option;
A: Built-in Chip Enable Circuit, Active at "L"
B: Built-in Chip Enable Circuit, Active at "H"
d
Designation of Taping Type;
T1 or T2 (SOT89-5), TR(HSON-6/HSOP-6J(Under Development)) (Refer to Taping Specifications)
Rev. 1.13 -3-
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I PIN CONFIGURATION
G SOT-89-5
5
4
1
2
3
Mark Side
G HSON-6P
6 5 4
1 2 3
G HSOP-6J (Under Development)
1
1
1
1
2
3
4
5
6
Rev. 1.13 - 4 -
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I PIN DESCRIPTION
SOT89-5
Pin No.
Symbol
Description
1
CE or CE
Chip Enable Pin Voltage Regulator Output Pin
2
GND
Ground Pin
3
NC
No Connection
4
V
DD
Input Pin
5
V
OUT
Voltage Regulator Output Pin
HSON-6P
Pin No.
Symbol
Description
1
V
OUT
Voltage Regulator Output Pin
2
V
OUT
Voltage Regulator Output Pin
3
CE or CE
Chip Enable Pin Voltage Regulator Output Pin
4
GND
Ground Pin
5
V
DD
Input Pin
6
V
DD
Input Pin
HSOP-6J
Pin No.
Symbol
Description
1
V
OUT
Voltage Regulator Output Pin
2
GND
Ground Pin
3
CE or CE
Chip Enable Pin Voltage Regulator Output Pin
4
NC
No Connection
5
GND
Ground Pin
6
V
DD
Input Pin
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ABSOLUTE MAXIMUM RATINGS
Item
Symbol
Rating
Unit
Input Voltage
V
IN
7.0
V
Input Voltage(CE or CE Input Pin)*
Note
V
CE
-0.3 ~ V
IN
+0.3
V
Output Voltage
V
OUT
-0.3 ~ V
IN
+0.3
V
Output Current
I
OUT
1.2
A
Power Dissipation
P
D
Internally limited
Operating Temperature
T
opt
-40 ~ 85
C
Storage Temperature
T
stg
-55 ~ 125
C
Rev. 1.13 -5-
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ELECTRICAL CHARACTERISTICS
G
R1170XxxxA
(Topt=25
C)
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Input Voltage
V
IN
6.0
V
Supply Current1
I
SS1
V
IN
-V
OUT
=1.0V
V
CE
=GND
80
160
A
Standby Current
Istb
V
IN
=V
CE
=6.0V
0.1
1.0
A
Output voltage
V
OUT
V
IN
-V
OUT
=1.0V
I
OUT
=100mA
x0.98
x1.02
V
Output Current
I
OUT1
V
IN
-V
OUT
=1.0V
800
mA
Load regulation
V
OUT
/
I
OUT
V
IN
-V
OUT
=1.0V
1mA
I
OUT
300mA
30
100
mV
Dropout Voltage
V
DIF
I
OUT
=300mA
Refer to Dropout Voltage Table
Line regulation
V
OUT
/
V
IN
I
OUT
=100mA
V
OUT
+0.5V
V
IN
6.0V
0.05
0.30
%/V
Ripple Rejection
RR
f=1kHz,Ripple 0.5Vp-p
1.5V
V
IN
4.0V:
V
IN
-V
OUT
=1.0V
4.1V
V
IN
5.0V:
V
IN
-V
OUT
=0.75V
50
dB
Output Voltage
Temperature Coefficient
V
OUT
/
T
I
OUT
=10mA
-40
C Topt 85C
100
ppm
/
C
Short Current Limit
I
LIM
V
OUT
=0V
40
mA
Pull-up resistance for CE pin
R
PU
1.25
2.50
5.00
M
CE Input Voltage "H"
V
CEH
1.50
V
IN
V
CE Input Voltage "L"
V
CEL
0.00
0.25
V
Thermal Shutdown Detector
Threshold Temperature
T
TSD
Junction Temperature
150
C
Thermal Shutdown Released
Temperature
T
TSR
Junction Temperature
120
C
Rev. 1.13 - 6 -
G
R1170xxxxB
(Topt=25
C)
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
Input voltage
V
IN
6.0
V
Supply Current1
I
SS1
V
IN
-V
OUT
=1.0V V
CE=
V
IN
80
160
A
Standby Current
Istb
V
IN
=6.0V, V
CE
=GND
0.1
1.0
A
Reference Voltage for
Adjustable Voltage Regulator
V
OUT
V
IN
-V
OUT
=1.0V
I
OUT
=100mA
x0.98
x1.02
V
Output Current
I
OUT1
V
IN
-V
OUT
=1.0V
800
mA
Load regulation
V
OUT
/
I
OUT
V
IN
-V
OUT
=1.0V
1mA
I
OUT
300mA
30
100
mV
Dropout Voltage
V
DIF
I
OUT
=300mA
Refer to Dropout Voltage Table
Line regulation
V
OUT
/
V
IN
I
OUT
=100mA
V
OUT
+0.5V
V
IN
6.0V
0.05
0.30
%/V
Ripple Rejection
RR
f=1kHz,Ripple 0.5Vp-p
1.5V
V
IN
4.0V:
V
IN
-V
OUT
=1.0V
4.1V
V
IN
5.0V:
V
IN
-V
OUT
=0.75V
50
dB
Output Voltage
Temperature Coefficient
V
OUT
/
T
-40
CTopt85C
100
ppm
/
C
Short Current Limit
I
LIM
V
OUT
=0V
40
mA
Pull-down resistance for CE pin
R
PD
1.25
2.50
5.00
M
CE Input Voltage "H"
V
CEH
1.5
V
IN
V
CE Input Voltage "L"
V
CEL
0.00
0.25
V
Thermal Shutdown Detector
Threshold Temperature
T
TSD
Junction Temperature
150
C
Thermal Shutdown Released
Temperature
T
TSR
Junction Temperature
120
C
GDropout Voltage by Output Voltage (Topt=25C)
Dropout Voltage (V)
Output Voltage
V
OUT
(V)
Typ.
Max.
V
OUT
=1.5
0.35
0.45
V
OUT
=1.6
0.30
0.35
V
OUT
=1.7
0.25
0.30
1.8
V
OUT
2.0
0.20
0.25
2.1
V
OUT
2.4
0.15
0.20
2.5
V
OUT
5.0
0.12
0.18
Rev. 1.13 -7-
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TEST CIRCUITS
V
OUT
GND
CE
V
DD
R1170Xxx1B Series
IN
OUT
10
F
V
OUT
GND
CE
V
DD
IN
OUT
Standard Test Circuit
Test Circuit for Ripple Rejection, Input Transient
Response
V
OUT
GND
CE
V
DD
IN
OUT
V
OUT
GND
CE
V
DD
IN
OUT
Supply Current Test Circuit
Test Circuit for Load Transient Response
I
SS
Iout
P.G
Iout
I1
I2
10
F
10
F
10
F
10
F
10
F
10
F
R1170Xxx1B Series
R1170Xxx1B Series
R1170Xxx1B Series
Rev. 1.13 - 8 -
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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 as much as 10
F Capacitor as C
L.
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. Further, refer to the
Typical Characteristics No.12.
Mounting on PCB
Make V
DD
and GND lines sufficient. If their impedance is high, current flows, the noise pick-up or
unstable operation may result. Further use as much as 10
F Capacitor between V
DD
pin and GND
pin as close as possible.
Set an Output capcitor 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 R1170XxxxB
IN
OUT
V
DD
CE
GND
V
OUT
CI
CL
R1170Xxx1B
CI=10
F(Ceramic), CL=10F(Ceramic)
Rev. 1.13 -9-
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TYPICAL CHARACTERISTICS
1)Output Voltage vs. Output Current(Topt=25
C)
R1170x151B
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0
250
500
750
1000
1250
1500
Output Current
I
OUT
(mA)
Output Voltage
V
OUT
(V)
R1170x301B
0
0.5
1
1.5
2
2.5
3
3.5
0
250
500
750
1000
1250
1500
Output Current I
OUT
(mA)
Output Voltage
V
OUT
(V)
R1170x501B
0
1
2
3
4
5
6
0
250
500
750
1000
1250
1500
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
2)Output Voltage vs. Input Voltage(Topt=25
C)
R1170X151B
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1
2
3
4
5
6
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 100mA
I
OUT
= 300mA
R1170X201B
1.4
1.5
1.6
1.7
1.8
1.9
2
2.1
2.2
1
2
3
4
5
6
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 300mA
I
OUT
= 100mA
I
OUT
= 10mA
I
OUT
= 1mA
V
IN
=3.5V
V
IN
=2.5V
V
IN
=2V
V
IN
=5V
V
IN
=4V
V
IN
=3.5V
V
IN
=6V
V
IN
=5.5V
Rev. 1.13 - 10 -
R1170X301B
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
2
3
4
5
6
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA
I
OUT
= 100mA
I
OUT
= 300mA
I
OUT
= 10mA
R1170X401B
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
3.5
4
4.5
5
5.5
6
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
= 1mA I
OUT
= 10mA
I
OUT
=100mA
I
OUT
=300mA
R1170x501B
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.2
4.0
4.5
5.0
5.5
6.0
Input Voltage V
IN
(V)
Output Voltage
V
OUT
(V)
3)Dropout Voltage vs. Output Current
R1170X151B
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
R1170X201B
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
Dropout Voltage
V
DIF
(V)
I
OUT
=1mA
I
OUT
=10mA
I
OUT
=100mA
I
OUT
=300mA
85
C
25
C
-40
C
85
C
25
C
-40
C
Rev. 1.13 -11-
R1170X301B
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
Dropout Voltage
V
DIF
(V)
R1170X401B
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
Dropout Voltage
V
DIF
(V)
R1170X501B
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
4)Output Voltage vs. Temperature
R1170X151B
1.40
1.43
1.45
1.48
1.50
1.53
1.55
1.58
1.60
-50
-25
0
25
50
75
100
Temperature Topt
Output Voltage V
OUT
(V)
I
OUT
=10mA
V
IN
=2.5V
R1170X201B
1.90
1.93
1.95
1.98
2.00
2.03
2.05
2.08
2.10
-50
-25
0
25
50
75
100
Temperature Topt
Output Voltage V
OUT
(V)
I
OUT
=10mA
V
IN
=3V
(
C)
(
C)
-40
C
25
C
85
C
85
C
25
C
-40
C
-40
C
25
C
85
C
Rev. 1.13 - 12 -
R1170X301B
2.80
2.85
2.90
2.95
3.00
3.05
3.10
3.15
3.20
-50
-25
0
25
50
75
100
Temperature Topt
Output Voltage V
OUT
(V)
I
OUT
=10mA
V
IN
=4V
R1170X401B
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
-50
-25
0
25
50
75
100
Temperature Topt
Output Voltage V
OUT
(V)
I
OUT
=10mA
V
IN
=5V
R1170x501B
4.80
4.85
4.90
4.95
5.00
5.05
5.10
5.15
5.20
-50
-25
0
25
50
75
100
Temperature Topt
Output Voltage
V
OUT
(V)
V
IN
=6V , I
OUT
=10mA
5)Supply Current vs. Input Voltage(Topt=25
C)
R1170X151B
0
20
40
60
80
100
120
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Supply Current Iss(uA)
R1170X201B
0
20
40
60
80
100
120
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Supply Current Iss(uA)
(
C)
(
C)
(
C)
Rev. 1.13 -13-
R1170X301B
0
20
40
60
80
100
120
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Supply Current Iss
uA)
R1170X401B
0
20
40
60
80
100
120
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Supply Current Iss(uA)
R1170x501B
0
20
40
60
80
100
120
0
1
2
3
4
5
6
Input Voltage V
IN
V)
Supply Current
I
SS
(uA)
6)Supply Current vs. Temperature
R1170X151B
20
40
60
80
100
120
140
160
-50
-25
0
25
50
75
100
Temperature Topt
Supply Current Iss (uA)
V
IN
=2.5V
R1170X201B
20
40
60
80
100
120
140
160
-50
-25
0
25
50
75
100
Temperature Topt
Supply Current Iss (uA)
V
IN
=3V
(
C)
(
C)
Rev. 1.13 - 14 -
R1170X301B
20
40
60
80
100
120
140
160
-50
-25
0
25
50
75
100
Temperature Topt
Supply Current Iss (uA)
V
IN
=4V
R1170X401B
20
40
60
80
100
120
140
160
-50
-25
0
25
50
75
100
Temperature Topt
Supply Current Iss (uA)
V
IN
=5V
R1170x501B
20
40
60
80
100
120
140
160
-50
-25
0
25
50
75
100
Temperature Topt()
Supply Current I
SS
(uA)
V
IN
=6V
7)Dropout Voltage vs. Set Output Voltage(Topt=25
C)
R1170x501B
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1
2
3
4
5
Set Output Voltage V
SET
(V)
Dropout Voltage
V
DIF
(V)
I
OUT
=100mA
I
OUT
=400mA
I
OUT
=600mA
I
OUT
=800mA
(
C)
(
C)
Rev. 1.13 -15-
8)Ripple Rejection vs. Frequency
R1170X151B
0
10
20
30
40
50
60
70
80
0.01
0.1
1
10
100
Ripple Frequency f (kHz)
Ripple Rejection RR (dB)
V
IN
=2.5V+0.5Vp-p
I
OUT
=100mA
R1170X201B
0
10
20
30
40
50
60
70
80
0.01
0.1
1
10
100
Ripple Frequency f(kHz)
Ripple Rejection
RR (dB)
V
IN
=3V+0.5Vp-p
I
OUT
=100mA
R1170X301B
0
10
20
30
40
50
60
70
80
0.01
0.1
1
10
100
Ripple Frequency f (kHz)
Ripple Rejection
RR (dB)
V
IN
=4V+0.5Vp-p
I
OUT
=100mA
R1170X401B
0
10
20
30
40
50
60
70
80
0.01
0.1
1
10
100
Ripple Frequency f (kHz)
Ripple Rejection
RR (dB)
V
IN
=5V+0.5Vp-p
I
OUT
=100mA
R1170x501B
0
10
20
30
40
50
60
70
80
0.01
0.1
1
10
100
Ripple Frequency f(kHz)
Ripple Rejection
RR(dB)
V
IN
=5.75+0.5Vp-p, I
OUT
=100mA
Rev. 1.13 - 16 -
9)Ripple Rejection vs. Input Voltage
R1170X301B
0
10
20
30
40
50
60
3
3.2
3.4
3.6
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
= 1mA
C
OUT
= 10uF
f = 400Hz
f =1kHz
f = 10kHz
R1170X301B
0
10
20
30
40
50
60
3
3.2
3.4
3.6
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
= 10mA
C
OUT
= 10uF
f = 400Hz
f =1kHz
f = 10kHz
R1170X301B
0
10
20
30
40
50
60
3
3.2
3.4
3.6
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
I
OUT
= 100mA
C
OUT
= 10uF
f = 400Hz
f =1kHz
f = 10kHz
10)Input Transient Response (Topt=25
C)
R1170X151B
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
0
20
40
60
80
100
120
140
160
180
200
Time t(us
Output Voltage V
OUT
(V)
0
0.5
1
1.5
2
2.5
3
3.5
4
Input Voltage V
IN
(V)
C
OUT
=Ceramic 10uF
I
OUT
=100mA
tr=tf=10us
Input Voltage
Output Voltage
Rev. 1.13 -17-
R1170X301B
2.8
2.9
3
3.1
3.2
3.3
3.4
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
C
OUT
=Ceramic 10uF
tr=tf=10us
I
OUT
=100mA
Input Voltage
Output Voltage
R1170X301B
2.8
2.9
3
3.1
3.2
3.3
3.4
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
C
OUT
= Ceramic 4.7uF
tr=tf=10us
I
OUT
=100mA
Input Voltage
Output Voltage
R1170X501B
4.90
4.95
5.00
5.05
5.10
5.15
5.20
0
20
40
60
80
100
120
140
160
180
200
Time t(u)
Output Voltage
V
OUT
(V)
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage
V
IN
(V)
Input Voltage
Output Voltage
tr=tf=10us IOUT=100mA,
COUT=Ceramic 10uF
Rev. 1.13 - 18 -
R1170X501B
4.90
4.95
5.00
5.05
5.10
5.15
5.20
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage V
IN
(V)
11)Load Transient Response(Topt=25
C)
R1170X151B
1.4
1.5
1.6
1.7
1.8
1.9
2
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
0
20
40
60
80
100
120
Output Current I
OUT
(mA)
tr=tf=3us
V
IN
=2.5V
C
IN
= Ceramic 10uF
C
OUT
=Ceramic 10uF
Output Current
Output Voltage
R1170X301B
2.9
3
3.1
3.2
3.3
3.4
3.5
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
0
20
40
60
80
100
120
Output Current I
OUT
(mA)
C
IN
= Ceramic 10uF
C
OUT
=Ceramic 10uF
tr=tf=3us
V
IN
=4V
Output Voltage
Output Current
Input Voltage
Output Voltage
tr=tf=10us IOUT=100mA,
COUT=Ceramic 4.7uF
Rev. 1.13 -19-
R1170X301B
2.9
3
3.1
3.2
3.3
3.4
3.5
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage V
OUT
(V)
0
20
40
60
80
100
120
Output Current I
OUT
(mA)
C
IN
= Ceramic 10uF
C
OUT
=Ceramic 4.7uF
tr=tf=3us
V
IN
=4V
Output Current
Output Voltage
R1170X501B
4.90
4.95
5.00
5.05
5.10
5.15
5.20
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage
V
OUT
(V)
-150
-100
-50
0
50
100
150
Output Current
I
OUT
(mA)
tr=tf=3us, C
IN
=Ceramic 10uF, C
OUT
=Ceramic 10uF
Output Current
Output Voltage
R1170X501B
4.90
4.95
5.00
5.05
5.10
5.15
5.20
0
20
40
60
80
100
120
140
160
180
200
Time t(us)
Output Voltage
V
OUT
(V)
-150
-100
-50
0
50
100
150
Output Current I
OUT
(mA)
Output Current
Output Voltage
tr=tf=3us, CIN = Ceramic 10uF
COUT= Ceramic 4.7uF
Rev. 1.13 - 20 -
12)Stable Area(Topt=25
C,V
IN
=Set Output Voltage+1V,C
IN
=Ceramic 10
F)
R1170XXXXB
CE
VIN
Vout
GND
ESR
Ceramic
Capacitor
IIout
S.A.
Spectrum
Analyzer
Vin
Ceramic
Capacitor
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 40
V or less than
40
V, the ESR values are plotted as stable area. Upper limit is described in the next four graphs, or ESR vs. Output
Current. (Hatched area is the stable area.)
R1170X151B
0.1
1
10
100
0
200
400
600
800
Output Current I
OUT
(mA)
ESR
Oh
m
)
C
OUT
=
Ceramic 10uF
R1170X151B
0.1
1
10
100
0
200
400
600
800
Output Current I
OUT
(mA)
ES
R
Oh
m
)
C
OUT
=Ceramic 4.7uF
R1170X301B
0.1
1
10
100
0
200
400
600
800
Output Current I
OUT
(mA)
ES
R
Oh
m
)
C
OUT
=Ceramic 10uF
R1170X301B
0.1
1
10
100
0
200
400
600
800
Output Current I
OUT
(mA)
ES
R(
O
h
m)
C
OUT
=Ceramic 4.7uF
Rev. 1.13 -21-
R1170X501B
0.01
0.1
1
10
100
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
ESR(Ohm)
C
OUT
=Ceramic 10uF
R1170X501B
0.01
0.1
1
10
100
0
100
200
300
400
500
600
700
800
Output Current I
OUT
(mA)
ESR(Ohm)
C
OUT
=Ceramic 4.7uF
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