'2001.7.10
SOT23-6 150mA 2ch LDO REGULATORS
R5323N SERIES
Rev. 1.10 - 1 -
■ OUTLINE
The R5323N Series are voltage regulator ICs with high output voltage accuracy, low supply current, low dropout, and high
ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier,
resistors for setting Output Voltage, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage due to built-in transistor with low ON resistance, and a chip enable function
prolongs the battery life of each system. The line transient response and load transient response of the R5323N Series are
excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment.
The output voltage of these ICs is internally fixed with high accuracy. Since the package for these ICs is SOT-23-6 package,
2ch LDO regulators are included in each package, high density mounting of the ICs on boards is possible.
■ FEATURES
z Low Supply Current .................................................. TYP. 90µA(VR1,VR2)
z Standby Mode ........................................................... TYP. 0.1µA(VR1,VR2)
z Low Dropout Voltage ................................................ TYP. 0.22V(IOUT=150mA Output Voltage=3.0V Type)
z High Ripple Rejection ............................................... TYP. 75dB(VOUT≤2.4V), TYP. 70dB(VOUT≥2.5V) (f=1kHz)
........................................................................................... TYP. 65dB(VOUT≤2.4V), TYP. 60dB(VOUT≥2.5V) (f=10kHz)
z Low Temperature-Drift Coefficient of Output Voltage TYP. ±100ppm/°C
z Excellent Line Regulation ......................................... TYP. 0.02%/V
z High Output Voltage Accuracy.................................. ±2.0%
z Small Package ..........................................................SOT-23-6
z Output Voltage...........................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is
possible
z Built-in chip enable circuit (A/B: active high)
z Built-in fold-back protection circuit ..........................TYP. 40mA (Current at short mode)
z Ceramic Capacitor is recommended. (1µF or more)
■ APPLICATIONS
z Power source for handheld communication equipment.
z Power source for electrical appliances such as cameras, VCRs and camcorders.
z Power source for battery-powered equipment.
Rev. 1.10 - 2 -
■ BLOCK DIAGRAM
R5323NXXXA R5323NXXXB
R2_2
R1_2
R1_1
R2_1
1
3
5
6
4
2
Current Limit
Vref
Error Amp.
Current Limit
Vref
Error Amp.
+
-
+
-
V
DD
V
OUT2
GND
V
OUT1
CE1
CE2
R2_2
R1_2
R1_1
R2_1
1
3
5
6
4
2
Current Li mit
Vr ef
Error Amp.
Current Li mit
Vr ef
Error Amp. +
-
+
-
V
DD
V
OUT
2
GND
V
OUT
1
CE1
CE2
■ SELECTION GUIDE
The output voltage, mask option, and the taping type for the ICs can be selected at the user's request. The selection can be made
with designating the part number as shown below;
R5323NXXXX-XX ←Part Number
↑ ↑↑
a b c
Code Contents
aSetting combination of 2ch Output Voltage (VOUT) : Serial Number for Voltage Setting,
Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible for each channel.
b
Designation of Mask Option :
A version: without auto discharge function at OFF state.
B version: with auto discharge function at OFF state.
cDesignation of Taping Type :
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
Rev. 1.10 - 3 -
■ PIN CONFIGURATION
SOT-23-6
123
4
6
VOUT1 VDD VOUT2
CE1 GND CE2
(mark side)
5
■ PIN DESCRIPTION
Pin No. Symbol Description
1V
OUT1 Output Pin 1
2V
DD Input Pin
3V
OUT2 Output Pin 2
4 CE2 Chip Enable Pin 2
5 GND Ground Pin
6 CE1 Chip Enable Pin 1
■ ABSOLUTE MAXIMUM RATINGS
Item Symbol Rating Unit
Input Voltage VIN 6.5 V
Input Voltage(CE Pin) VCE -0.3 ~ VIN+0.3 V
Output Voltage VOUT -0.3 ~ VIN+0.3 V
Output Current 1 IOUT1 200 mA
Output Current 2 IOUT2 200 mA
Power Dissipation PD250 mW
Operating Temperature Range Topt -40 ~ 85 °C
Storage Temperature Range Tstg -55 ~ 125 °C
Rev. 1.10 - 4 -
■ ELECTRICAL CHARACTERISTICS
● R5323NXXXA/B Topt=25°C
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT Output Voltage VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 30mA
VOUT
×0.98
VOUT
×1.02 V
IOUT Output Current VIN - VOUT = 1.0V 150 mA
∆VOUT/∆IOUT Load Regulation VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 150mA 15 40 mV
VDIF Dropout Voltage Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
ISS Supply Current VIN = Set VOUT+1V 90 120 µA
Istandby Supply Current (Standby) VIN = Set VOUT+1V
VCE = GND 0.1 1.0 µA
∆VOUT/∆VIN Line Regulation Set VOUT+0.5V ≤ VIN ≤ 6V
IOUT = 30mA 0.02 0.10 %/V
RR Ripple Rejection
Ripple 0.5Vp-p VIN = Set
VOUT+1V
IOUT = 30mA
( In case that VOUT≤1.7V,
VIN = Set VOUT+1.2V)
75
*Note1
65
*Note2
dB
VIN Input Voltage 2.0 6.0 V
∆VOUT/∆TOutput Voltage
Temperature Coefficient
IOUT = 30mA
-40°C ≤ Topt ≤ 85°C±100 ppm
/°C
Ilim Short Current Limit VOUT = 0V 40 mA
RPD CE Pull-down Resistance 0.7 2.0 8.0 MΩ
VCEH CE Input Voltage “H” 1.5 VIN V
VCEL CE Input Voltage “L” 0.0 0.3 V
enOutput Noise BW=10Hz to 100kHz 30 µVrms
RLOW Low Output Nch Tr. ON
Resistance (of B version) VCE=0V 60 Ω
Note1: f=1kHz, 70dB as to VOUT≥2.5V Output type.
Note2: f=10kHz, 60dB as to VOUT≥2.5V Output type.
● ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Dropout Voltage
VDIF (V)
Output Voltage
VOUT (V) Condition TYP. MAX.
VOUT = 1.5 0.38 0.70
VOUT = 1.6 0.35 0.65
VOUT = 1.7 0.33 0.60
1.8 ≤ VOUT ≤ 2.0 0.32 0.55
2.1 ≤ VOUT ≤ 2.7 0.28 0.50
2.8 ≤ VOUT ≤ 4.0
IOUT = 150mA
0.22 0.35
*Recommended Ceramic capacitor for Output: GRM219R61A105K(Murata)
General Example of External Components
Ceramic Capacitors: C1608X5R0J105K (TDK)
GRM188R60J105K (Murata)
Rev. 1.10 - 5 -
■ TEST CIRCUITS
C1
VOUT2
22
2
V
C3
C2
IOUT1
V
VOUT
1
GND
CE1
CE2
VOUT1
VDD
R5323N
SERIES
V
OUT2
IOUT2
A
ISS
C1
C3
C2
GND
CE1
CE2
V
OU
T1
VDD
R5323N
SERIES
V
OUT2
Fig.1 Standard test Circuit Fig.2 Supply Current Test Circuit
Pulse
Generator
C3
C2
IOUT 1
IOUT2
GND
CE1
CE2
V
OUT1
VDD
R5323N
SERIES
V
OUT2
PG
IOUT1a
C1
C3
C2
IOUT2bGND
CE1
CE2
V
OUT1
VDD
R5323N
SERIES
V
OUT2
IOUT1b
I
OUT 2
Fig.3 Ripple Rejection, Line Transient Response Test
Circuit
Fig.4 Load Transient Response Test Circuit
■ TYPICAL APPLICATION
C3
C2
VDD
CE2
CE1
VOUT2
GND
6
4
5
1
3
2
R
53
2
3
NXXX
X
SERIES
VOUT1
OUT1
OUT2
C1
IN
(External Components) Output Capacitor; Ceramic Type
Rev. 1.10 - 6 -
■ TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current (Topt=25°C)
1.5V(VR1)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
1.5V(VR2)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
2.8V(VR1)
0
0.5
1
1.5
2
2.5
3
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
2.8V(VR2)
0
0.5
1
1.5
2
2.5
3
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
4.0V(VR1)
0
1
2
3
4
5
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
4.0V(VR2)
0
1
2
3
4
5
0 100 200 300 400
Output Current IOUT[mA]
Output Voltage VOUT[V]
VIN=1.8V
VIN=2.0V
VIN=2.5V VIN=3.5V
VIN=2.0V VIN=3.5V
VIN=3.1V
VIN=4.8V
VIN=3.1V
VIN=4.8V
VIN=4.3V
VIN=6.0V
VIN=4.3V
VIN=6.0V
VIN=2.5V
VIN=1.8V
Rev. 1.10 - 7 -
2) Output Voltage vs. Input Voltage (Topt=25°C)
1.5V(VR1)
1
1.1
1.2
1.3
1.4
1.5
1.6
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
1.5V(VR2)
1
1.1
1.2
1.3
1.4
1.5
1.6
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
2.8V(VR1)
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
2.8V(VR2)
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
4.0V(VR1)
3
3.2
3.4
3.6
3.8
4
4.2
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
4.0V(VR2)
3
3.2
3.4
3.6
3.8
4
4.2
123456
Input Voltage VIN[V]
Output Voltage VOUT[V]
1mA
30mA
50mA
Rev. 1.10 - 8 -
3) Dropout Voltage vs. Temperature
1.5V(VR1)
0
0.1
0.2
0.3
0.4
0.5
0.6
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
1.5V(VR2)
0
0.1
0.2
0.3
0.4
0.5
0.6
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
2.8V(VR1)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
2.8V(VR2)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
4.0V(VR1)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
4.0V(VR2)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 25 50 75 100 125 150
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
Rev. 1.10 - 9 -
4) Output Voltage vs. Temperature
1.5V(VR1)
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
1.54
-50 -25 0 25 50 75 100
Temperature Topt
Output Voltage VOUT[V]
1.5V(VR2)
1.46
1.47
1.48
1.49
1.50
1.51
1.52
1.53
1.54
-50 -25 0 25 50 75 100
Temperature Topt
Output Voltage VOUT[V]
2.8V(VR1)
2.74
2.76
2.78
2.80
2.82
2.84
2.86
-50 -25 0 25 50 75 100
Temperature Topt
Output Voltage VOUT[V]
2.8V(VR2)
2.74
2.76
2.78
2.80
2.82
2.84
2.86
-50 -25 0 25 50 75 100
Temperature Topt
Output Voltage VOUT[V]
4.0V(VR1)
3.92
3.94
3.96
3.98
4.00
4.02
4.04
4.06
4.08
-50 -25 0 25 50 75 100
Temperature Topt
Output Voltage VOUT[V]
4.0V(VR2)
3.92
3.94
3.96
3.98
4.00
4.02
4.04
4.06
4.08
-50 -25 0 25 50 75 100
周囲温度 Topt
Output Voltage VOUT[V]
(°C) (°C)
VIN=3.8V IOUT=30mA
(°C) (°C)
VIN=3.8V IOUT=30mA
(°C)
VIN=5.0V IOUT=30mA
VIN=2.5V IOUT=30mA VIN=2.5V IOUT=30mA
VIN=5.0V IOUT=30mA
(°C)
Rev. 1.10 - 10 -
5) Supply Current vs. Input Voltage (Topt=25°C)
1.5V
0
20
40
60
80
100
0123456
Input Voltage VIN[V]
Supply Current ISS[uA]
VR1
VR2
2.8V
0
20
40
60
80
100
0123456
Input Voltage VIN[V]
Supply Current ISS[uA]
VR1
VR2
4.0V
0
20
40
60
80
100
0123456
Input Voltage VIN[V]
Supply Current ISS[uA]
VR1
VR2
6) Supply Current vs. Temperature
1.5V(VR1)
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Temperature Topt
Supply Current ISS[uA]
1.5V(VR2)
0
20
40
60
80
100
-50-25 0 255075100
Temperature Topt
Supply Current ISS[uA]
(°C)
VIN=2.5V
(°C)
VIN=2.5V
Rev. 1.10 - 11 -
2.8V(VR1)
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Temperature Topt
Supply Current ISS[uA]
2.8V(VR2)
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Temperature Topt
Supply Current ISS[uA]
4V(VR1)
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Temperature Topt
Supply Current ISS[uA]
4V(VR2)
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Temperature Topt
Supply Current ISS[uA]
7) Dropout Voltage vs. Set Output Voltage Topt=25°C
VR1
0
0.1
0.2
0.3
0.4
0.5
0.6
1234
Set Output Voltage Vreg[V]
Dropout Voltage VDIF[V]
10mA
30mA
50mA
150mA
VR2
0
0.1
0.2
0.3
0.4
0.5
0.6
1234
Set Output Voltage Vreg[V]
Dropout Voltage VDIF[V]
10mA
30mA
50mA
150mA
(°C)
VIN=3.8V
(°C)
VIN=3.8V
(°C)
VIN=5.0V VIN=5.0V
(°C)
Rev. 1.10 - 12 -
8) Ripple Rejection vs. Frequency (Topt=25°C)
1.5V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
1.5V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
1.5V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
1.5V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
2.8V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1 mA
IOUT=30mA
IOUT=1 50mA
2.8V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
VIN=2.5V+0.5Vp-p
COUT= Ceramic 1.0µF
VIN=2.5V+0.5Vp-p
COUT= Ceramic 2.2µF
VIN=2.5V+0.5Vp-p
COUT= Ceramic 2.2µF
VIN=3.8V+0.5Vp-p
COUT= Ceramic 1.0µF
VIN=2.5V+0.5Vp-p
COUT= Ceramic 1.0µF
VIN=3.8V+0.5Vp-p
COUT= Ceramic 1.0µF
Rev. 1.10 - 13 -
2.8V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
2.8V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
4.0V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
4.0V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
4.0V(VR1)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
4.0V(VR2)
0
10
20
30
40
50
60
70
80
90
0.1 1 10 100
Frequency ｆ[kHz]
Ripple Rejection RR[dB]
IOUT=1mA
IOUT=30mA
IOUT=150mA
VIN=3.8V+0.5Vp-p
COUT= Ceramic 2.2µF
VIN=3.8V+0.5Vp-p
COUT= Ceramic 2.2µF
VIN=5.0V+0.5Vp-p
COUT= Ceramic 1.0µF
VIN=5.0V+0.5Vp-p
COUT= Ceramic 1.0µF
VIN=5.0V+0.5Vp-p
COUT= Ceramic 2.2µF
VIN=5.0V+0.5Vp-p
COUT= Ceramic 2.2µF
Rev. 1.10 - 14 -
9) Ripple Rejection vs. Input Voltage (DC bias) COUT = Ceramic 1.0µF, To pt= 2 5°C
2.8V(VR1)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
2.8V(VR2)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
2.8V(VR1)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
2.8V(VR2)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
2.8V(VR1)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
2.8V(VR2)
0
10
20
30
40
50
60
70
80
90
100
2.9 3.0 3.1 3.2 3.3
Input Voltage VIN[V]
Ripple Rejection RR[dB]
f=1kHz
f=10kHz
f=100kHz
IOUT=1mA IOUT=1mA
IOUT=30mA IOUT=30mA
IOUT=50mA IOUT=50mA
Rev. 1.10 - 15 -
10) Input Transient Response IOUT=30mA, tr=tf=5µs
R5323N001X(2.8V,VR1)
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
R5323N001X(2.8V,VR1) Topt=25°C
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
R5323N001X(2.8V,VR1) Topt=25°C
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
COUT= Ceramic 1.0µF
VIN
COUT= Ceramic 2.2µF
VOUT
VOUT
COUT= Ceramic 4.4µF
VOUT
Rev. 1.10 - 16 -
R5323N001X(2.8V,VR2) Topt=25°C
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
R5323N001X(2.8V,VR2) Topt=25°C
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
R5323N001X(2.8V,VR2) Topt=25°C
2.79
2.80
2.81
2.82
2.83
2.84
2.85
0 102030405060708090100
Time T[us]
Output Voltage VOUT[V]
0
1
2
3
4
5
6
Input Voltage VIN[V]
VIN
COUT= Ceramic 1.0µF
VIN
VOUT
VIN
VOUT
COUT= Ceramic 2.2
µ
F
VOUT
COUT= Ceramic 4.4µF
Rev. 1.10 - 17 -
11) Load Transient Response
2.8V(VR1)
2.75
2.80
2.85
0 5 10 15 20
Time t [us]
Output Voltage VOUT[V]
50
100
150
Output Current IOUT1 [mA]
2.85
2.80
2.75
Cin=Ceramic1.0uF
Cout=Ceramic1.0uF 2.8V(VR2)
2.75
2.80
2.85
2.75
2.80
2.85
0 5 10 15 20
Time t[us]
Output Voltage VOUT[V]
0
50
100
150
Output Current IOUT2 [mA]
Cin=Ceramic1.0uF
Cout=Ceramic1.0uF
IOUT2
VOUT1
VOUT2
IOUT1=30mA
12) ESR vs. Output Current Topt=25°C
CIN = COUT =Ceramic 1.0µF, VIN=2.5V, f=10Hz to 2MHz
(BW=30Hz)
1.5V(VR1)
0.01
0.1
1
10
100
0 50 100 150
Output Current IOUT [mA]
ESR [Ohm]
1.5V(VR2)
0.01
0.1
1
10
100
0 50 100 150
Output Current IOUT [mA]
ESR [Ohm]
IOUT1
VOUT1
VOUT2
IOUT2=30mA
Rev. 1.10 - 18 -
CIN = COUT =Ceramic 1.0µF, VIN=2.5V, f=10Hz to 2MHz
(BW=30Hz)
2.8V(VR1)
0.01
0.1
1
10
100
0 50 100 150
Output Current IOUT [mA]
ESR [Ohm]
2.8V(VR2)
0.01
0.1
1
10
100
0 50 100 150
Output Current IOUT [mA]
ESR [Ohm]
13) Minimum Operating Voltage
1.5V Minimum Operating Voltage Range
1.5
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
075150
Output Current IOUT(mA)
VDD(V)
VDD
ＶＩＮ（ＭＩＮ）
Rev. 1.10 - 19 -
■ TECHNICAL NOTES
When using these ICs, consider the following points:
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 or more capacitance COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of
which is in the range described as follows:
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown in the typical characteristics above. The
conditions when the white noise level is under 40µV (Avg.) are marked as the hatched area in the graph.
Test these ICs with as same external components as ones to be used on the PCB.
z Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work
correctly.
z Connect the capacitor with a capacitance of 1µF or more between VDD and GND as close as possible.
z Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.