R5322N [RICOH]
SOT23-6W 120mA 2ch LDO REGULATORS; SOT23-6W 120毫安2通道LDO稳压器
| 型号： | R5322N |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | SOT23-6W 120mA 2ch LDO REGULATORS |
| 文件： | 总23页 (文件大小：214K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SOT23-6W 120mA 2ch LDO
REGULATORS
R5322N SERIES
APPLICATION MANUAL
NO. EA-077-0012
SOT23-6W 120mA 2ch LDO REGULATORS
R5322N SERIES
OUTLINE
The R5322N 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 and prolong the battery life of each system. The line transient response and load transient response of the
R5322N 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-
6W package, and include 2ch LDO regulators each, high density mounting of the ICs on boards is possible.
FEATURES
• Ultra-Low Supply Current................................................. TYP. 75µA (VR1,VR2)
• Standby Mode..................................................................... TYP. 0.1µA (VR1,VR2)
• Low Dropout Voltage ......................................................... TYP. 0.15V (IOUT=100mA Output Voltage=3.0V Type)
• High Ripple Rejection ........................................................ TYP. 75dB (f=1kHz)
• Low Temperature-Drift Coefficient of Output Voltage..... TYP. ±100ppm/°C
• Excellent Line Regulation.................................................. TYP. 0.05%/V
• High Output Voltage Accuracy .......................................... ±2.0%
• Small Package .................................................................... SOT-23-6W
• Output Voltage.................................................................... Stepwise setting with a step of 0.1V in the range of 1.5V to
4.0V is possible
• Built-in chip enable circuit (A/B: active high)
• Built-in fold-back protection circuit................................... TYP. 40mA (Current at short mode)
APPLICATIONS
• Power source for cellular phones such as GSM, CDMA and various kinds of PCS.
• Power source for electrical appliances such as cameras, VCRs and camcorders.
• Power source for battery-powered equipment.
1
R5322N
BLOCK DIAGRAM
• R5322N×××A
CE1
V
OUT1
1
6
5
R1-1
R2-1
-
Error Amp.
Vref
+
Current Limit
GND
V
DD
2
R1-2
R2-2
-
Error Amp.
Vref
+
Current Limit
CE2
3
4
VOUT2
• R5322N×××B
CE1
V
OUT1
1
2
6
5
-
Error Amp.
Vref
R1-1
+
Current Limit
R2-1
GND
VDD
R1-2
R2-2
-
Error Amp.
Vref
+
Current Limit
CE2
3
4
VOUT2
2
R5322N
SELECTION GUIDE
The output voltage, mask option, and the taping type for the ICs can be selected at the user’s request. The selec-
tion can be made with designating the part number as shown below;
R5322N××××-×× ←Part Number
↑ ↑ ↑
a b c
Code
Contents
Setting 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.
a
Designation of Mask Option :
b
c
A version: without auto discharge function at OFF state.
B version: with auto discharge function at OFF state.
Designation of Taping Type :
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
PIN CONFIGURATION
SOT-23-6W
6
5
4
VOUT1 GND VOUT2
(mark side)
CE1
VDD
CE2
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
Description
1
CE1
VDD
Chip Enable Pin 1
Input Pin
2
3
4
5
6
CE2
Chip Enable Pin 2
Output Pin 2
Ground Pin
VOUT2
GND
VOUT1
Output Pin 1
3
R5322N
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
6.5
Unit
V
VIN
Input Voltage
VCE
Input Voltage (CE Pin)
Output Voltage
-0.3 ~ VIN+0.3
-0.3 ~ VIN+0.3
130
V
VOUT
IOUT1
IOUT2
PD
V
Output Current 1
mA
mA
mW
°C
Output Current 2
130
Power Dissipation
250
Topt
Tstg
Operating Temperature Range
Storage Temperature Range
-40 ~ 85
-55 ~ 125
°C
4
R5322N
ELECTRICAL CHARACTERISTICS
• R5322N×××A/B
Topt=25°C
Symbol
VOUT
Item
Output Voltage
Output Current
Conditions
MIN.
TYP.
MAX.
Unit
VIN = Set VOUT+1V
VOUT
VOUT
V
1mA ≤ IOUT ≤ 30mA
×0.98
×1.02
IOUT
VIN – VOUT = 1.0V
120
mA
mV
VIN = Set VOUT+1V
∆VOUT/∆IOUT Load Regulation
12
40
1mA ≤ IOUT ≤ 120mA
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLT-
AGE
VDIF
Dropout Voltage
ISS
Supply Current
VIN = Set VOUT+1V
75
150
1.0
µA
µA
Istandby
Supply Current (Standby)
VIN = VCE = Set VOUT+1V
0.1
Set VOUT+0.5V ≤ VIN ≤ 6V
IOUT = 30mA
∆VOUT/∆VIN Line Regulation
0.05
75
0.20
6.0
%/V
(In case that VOUT ≤ 1.6V,
2.2V≤ VIN ≤ 6V)
f = 1kHz, Ripple 0.5Vp-p
VIN = Set VOUT+1V,
IOUT = 30mA
RR
Ripple Rejection
Input Voltage
dB
V
VIN
2.2
Output Voltage
IOUT = 30mA
ppm
∆VOUT/∆T
±100
Temperature Coefficient
-40°C ≤ Topt ≤ 85°C
/°C
Ilim
RPD
VCEH
VCEL
en
Short Current Limit
CE Pull-down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
VOUT = 0V
40
4
mA
MΩ
V
1.5
1.5
0.0
16
VIN
0.3
V
BW=10Hz to 100kHz
VCE=0V
30
70
µVrms
Low Output Nch Tr. ON
Resistance (of B version)
RLOW
Ω
5
R5322N
• ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Dropout Voltage
VDIF (V)
Output Voltage
VOUT (V)
Condition
TYP.
MAX.
0.70
0.50
0.45
0.40
0.30
1.5 ≤ VOUT ≤ 1.6
1.7 ≤ VOUT ≤ 1.8
1.9 ≤ VOUT ≤ 2.0
2.1 ≤ VOUT ≤ 2.7
2.8 ≤ VOUT ≤ 4.0
0.36
0.30
0.28
0.24
0.18
IOUT = 120mA
TEST CIRCUITS
4
5
6
3
2
1
V
OUT2
CE2
I
OUT2
V
OUT2
4
5
6
3
2
1
V
OUT2
CE2
C3
R5322N
SERIES
V
C3
R5322N
SERIES
GND
VDD
GND
VDD
I
SS
C1
A
C1
V
OUT1
VOUT1
CE1
I
OUT1
C2
V
OUT1
CE1
V
C2
∗ C1=Tantal 1.0µF
C2=C3=Tantal 2.2µF
∗ C1=1.0µF
C2=C3=2.2µF
Fig.1 Standard test Circuit
Fig.2 Supply Current Test Circuit
4
5
6
3
2
1
4
5
6
3
2
1
V
OUT2
CE2
V
OUT2
CE2
I
OUT2
C3
C3
R5322N
SERIES
R5322N
SERIES
GND
VDD
GND
VDD
I
OUT2a
I
OUT2b
C2
Pulse
Generator
I
OUT1b
V
OUT1
V
OUT1
CE1
CE1
IOUT1a
I
OUT1
PG
C2
C2
∗
C2=C3=2.2µF
∗
C1=1.0µF
C2=C3=2.2µF
Fig.3 Ripple Rejection, Line Transient Response
Test Circuit
Fig.4 Load Transient Response Test Circuit
6
R5322N
TYPICAL APPLICATION
OUT2
4
5
6
3
2
1
V
OUT2
CE2
C3
R5322N××××
SERIES
IN
GND
V
DD
C1
OUT1
V
OUT1
CE1
C2
(External Components) Output Capacitor; Tantalum Type
7
R5322N
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
1.5V (VR1)
1.5V (VR2)
1.6
1.6
1.4
1.2
1.0
1.4
V
IN=2.0V
V
IN=2.0V
V
IN=1.8V
V
IN=1.8V
1.2
1.0
V
IN=3.5V
V
IN=2.5V
V
IN=3.5V
0.8
0.6
0.8
0.6
V
IN=2.5V
0.4
0.2
0.0
0.4
0.2
0.0
0.00
0.10
0.20
0.30
0.00 0.05 0.10 0.15 0.20 0.25 0.30
Output Current IOUT(A)
Output Current IOUT(A)
2.8V (VR1)
2.8V (VR2)
3.0
2.5
3.0
VIN=3.1V
VIN=3.3V
2.5
VIN=3.1V
VIN=3.3V
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
VIN=4.8V
VIN=4.8V
VIN=3.5V
VIN=3.5V
0.00 0.05 0.10 0.15 0.20 0.25 0.30
Output Current IOUT(A)
0.00 0.05 0.10 0.15 0.20 0.25 0.30
Output Current IOUT(A)
4.0V (VR1)
4.0V (VR2)
4.5
4.5
4.0
3.5
4.0
3.5
VIN=4.3V
VIN=4.5V
V
V
IN=4.3V
IN=4.5V
IN=6.0V
3.0
2.5
2.0
3.0
2.5
2.0
V
VIN=6.0V
V
IN=5.0V
VIN=5.0V
1.5
1.0
0.5
0.0
1.5
1.0
0.5
0.0
0.00 0.05 0.10 0.15 0.20
Output Current IOUT(A)
0.30
0.00 0.05 0.10 0.15 0.20 0.25 0.30
Output Current IOUT(A)
8
R5322N
2) Output Voltage vs. Input Voltage
1.5V (VR1)
1.5V (VR2)
1.6
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.5
1.4
1.3
1.2
1.1
1.0
IOUT=1mA
IOUT=30mA
IOUT=50mA
IOUT=1mA
IOUT=30mA
IOUT=50mA
1
1
1
2
2
2
3
4
5
6
6
6
1
1
1
2
2
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
2.8V (VR1)
2.8V (VR2)
2.9
2.8
2.7
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
2.6
2.5
2.4
2.3
2.2
2.1
2.0
IOUT=1mA
IOUT=1mA
IOUT=30mA
IOUT=50mA
IOUT=30mA
IOUT=50mA
3
4
5
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
4.0V (VR1)
4.0V (VR2)
4.2
4.0
3.8
3.6
3.4
3.2
3.0
4.2
4.0
3.8
3.6
3.4
3.2
3.0
IOUT=1mA
IOUT=1mA
IOUT=30mA
IOUT=50mA
IOUT=30mA
IOUT=50mA
3
4
5
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
9
R5322N
3) Dropout Voltage vs. Temperature
1.5V (VR1)
1.5V (VR2)
1.00
1.00
Topt=85°C
Topt=85°C
25°C
-40°C
25°C
0.80
0.80
0.60
0.40
-40°C
0.60
0.40
0.20
0.00
0.20
0.00
0
0
0
20
4
080 60100
120
120
120
0
0
0
20
4
080 60100
120
120
120
Output Current IOUT(mA)
Output Current IOUT(mA)
2.8V (VR1)
2.8V (VR2)
0.40
0.40
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
0.35
0.30
0.35
0.30
0.25
0.20
0.15
0.10
0.25
0.20
0.15
0.10
0.05
0.00
0.05
0.00
20
4
080 60100
20
4
080 60100
Output Current IOUT(mA)
Output Current IOUT(mA)
4.0V (VR1)
4.0V (VR2)
0.40
0.40
Topt=85°C
25°C
-40°C
Topt=85°C
25°C
-40°C
0.35
0.30
0.35
0.30
0.25
0.20
0.15
0.10
0.25
0.20
0.15
0.10
0.05
0.00
0.05
0.00
20
4
080 60100
20
4
080 60100
Output Current IOUT(mA)
Output Current IOUT(mA)
10
R5322N
4) Output Voltage vs. Temperature
1.5V (VR1)
1.5V (VR2)
V
IN=2.5V IOUT=30mA
VIN=2.5V IOUT=30mA
1.54
1.54
1.53
1.52
1.53
1.52
1.51
1.50
1.49
1.48
1.51
1.50
1.49
1.48
1.47
1.46
1.47
1.46
-50
-25
-25
-25
0
25
50
75
100
-50
-25
-25
-25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
2.8V (VR1)
2.8V (VR2)
V
IN=3.8V IOUT=30mA
VIN=3.8V IOUT=30mA
2.86
2.84
2.86
2.84
2.82
2.80
2.78
2.76
2.74
2.82
2.80
2.78
2.76
2.74
-50
0
25
50
75
100
-50
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
4.0V (VR1)
4.0V (VR2)
V
IN=5.0V IOUT=30mA
V
IN=5.0V IOUT=30mA
4.08
4.06
4.04
4.02
4.08
4.06
4.04
4.02
4.00
4.00
3.98
3.96
3.98
3.96
3.94
3.92
3.94
3.92
-50
0
25
50
75
100
-50
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
11
R5322N
5) Supply Current vs. Input Voltage
1.5V
2.8V
100
100
80
60
80
60
40
20
0
40
20
0
VR1
VR2
VR1
VR2
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
4.0V
100
80
60
40
20
0
VR1
VR2
0
1
2
3
4
5
6
Input Voltage VIN(V)
6) Supply Current vs. Temperature
1.5V (VR1)
1.5V (VR2)
V
IN=2.5V
VIN=2.5V
100
100
80
60
80
60
40
20
0
40
20
0
-50
0
50
100
-50
0
50
100
Temperature Topt(°C)
Temperature Topt(°C)
12
R5322N
2.8V (VR1)
2.8V (VR2)
VIN=3.8V
VIN=3.8V
100
80
100
80
60
40
20
0
60
40
20
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
4V (VR1)
4V (VR2)
VIN=5.0V
VIN=5.0V
100
80
100
80
60
40
20
0
60
40
20
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
7) Dropout Voltage vs. Set Output Voltage
VR1
VR2
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0.70
IOUT=10mA
I
OUT=10mA
0.60
0.50
0.40
0.30
0.20
0.10
0.00
30mA
50mA
120mA
30mA
50mA
120mA
1.0
2.0
3.0
4.0
1.0
2.0
3.0
4.0
Output Voltage VOUT(V)
Output Voltage VOUT(V)
13
R5322N
8) Ripple Rejection vs. Frequency
1.5V (VR1)
1.5V (VR2)
V
IN=2.5V+0.5Vp-p
V
IN=2.5V+0.5Vp-p
C
OUT=tantal 1.0µF Topt=25°C
C
OUT=tantal 1.0µF Topt=25°C
90
90
80
70
60
50
80
70
60
50
40
30
20
10
0
40
30
20
10
0
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
1.5V (VR1)
1.5V (VR2)
V
IN=2.5V+0.5Vp-p
V
IN=2.5V+0.5Vp-p
C
OUT=tantal 2.2µF Topt=25°C
C
OUT=tantal 2.2µF Topt=25°C
90
90
80
70
60
50
80
70
60
50
40
30
20
10
0
40
30
20
10
0
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
2.8V (VR1)
2.8V (VR2)
VIN=3.8V+0.5Vp-p
V
IN=3.8V+0.5Vp-p
COUT=tantal 1.0µF Topt=25°C
C
OUT=tantal 1.0µF Topt=25°C
90
90
80
70
80
70
60
50
60
50
40
30
20
10
0
40
30
20
10
0
IOUT=1mA
IOUT=30mA
IOUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
14
R5322N
2.8V (VR1)
2.8V (VR2)
V
IN=3.8V+0.5Vp-p
V
IN=3.8V+0.5Vp-p
C
OUT=tantal 2.2µF Topt=25°C
COUT=tantal 2.2µF Topt=25°C
90
90
80
70
60
50
80
70
60
50
40
30
20
10
0
40
30
20
10
0
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
4.0V (VR1)
4.0V (VR2)
V
IN=5.0V+0.5Vp-p
VIN=5.0V+0.5Vp-p
C
OUT=tantal 1.0µF Topt=25°C
COUT=tantal 1.0µF Topt=25°C
90
90
80
70
60
50
80
70
60
50
40
30
20
10
0
40
30
20
10
0
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
4.0V (VR1)
4.0V (VR2)
V
IN=5.0V+0.5Vp-p
VIN=5.0V+0.5Vp-p
C
OUT=tantal 2.2µF Topt=25°C
COUT=tantal 2.2µF Topt=25°C
90
90
80
70
60
50
80
70
60
50
40
30
20
10
0
40
30
20
10
0
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
I
I
I
OUT=1mA
OUT=30mA
OUT=50mA
0.1
1
10
100
0.1
1
10
100
Frequency f(kHz)
Frequency f(kHz)
15
R5322N
9) Ripple Rejection vs. Input Voltage (DC bias)
2.8V (VR1)
2.8V (VR2)
COUT=tantal 2.2µF
COUT=tantal 2.2µF
IOUT=1mA
IOUT=1mA
100
100
80
80
60
60
40
40
f=1kHz
f=1kHz
f=10kHz
f=100kHz
f=10kHz
f=100kHz
20
0
20
0
2.9
3.0
3.1
3.2
3.3
2.9
3.0
3.1
3.2
3.3
Input Voltage VIN(V)
Input Voltage VIN(V)
2.8V (VR1)
2.8V (VR2)
C
OUT=tantal 2.2µF
OUT=30mA
C
OUT=tantal 2.2µF
I
I
OUT=30mA
100
80
100
80
60
60
40
40
f=1kHz
f=1kHz
f=10kHz
f=100kHz
f=10kHz
f=100kHz
20
0
20
0
2.9
3.0
3.1
3.2
3.3
2.9
3.0
3.1
3.2
3.3
Input Voltage VIN(V)
Input Voltage VIN(V)
2.8V (VR1)
2.8V (VR2)
C
OUT=tantal 2.2µF
C
OUT=tantal 2.2µF
I
OUT=50mA
IOUT=50mA
100
80
100
80
60
60
40
40
f=1kHz
f=1kHz
f=10kHz
f=100kHz
f=10kHz
f=100kHz
20
0
20
0
2.9
3.0
3.1
3.2
3.3
2.9
3.0
3.1
3.2
3.3
Input Voltage VIN(V)
Input Voltage VIN(V)
16
R5322N
10) Input Transient Response
R5322N001× (2.8V, VR1)
I
OUT=30mA COUT=tantal 1.0µF
tr/tf=5µs Topt=25°C
2.84
2.83
6.0
5.0
4.0
3.0
VIN
2.82
2.81
2.80
2.79
2.78
2.0
1.0
0.0
V
OUT
0
0
0
10
20
20
20
30
30
30
40
50
60
70
80
90
100
Time t(µs)
R5322N001× (2.8V, VR1)
I
OUT=30mA COUT=tantal 2.2µF
tr/tf=5µs Topt=25°C
2.84
6.0
2.83
2.82
2.81
5.0
4.0
3.0
V
IN
2.80
2.79
2.78
2.0
1.0
0.0
V
OUT
10
40
50
60
70
80
90
100
Time t(µs)
R5322N001× (2.8V, VR1)
I
OUT=30mA COUT=tantal 6.8µF
tr/tf=5µs Topt=25°C
2.84
2.83
6.0
5.0
V
IN
2.82
2.81
4.0
3.0
V
OUT
2.80
2.79
2.78
2.0
1.0
0.0
10
40
50
60
70
80
90
100
Time t(µs)
17
R5322N
R5322N001× (2.8V, VR2)
IOUT=30mA COUT=tantal 1.0µF
tr/tf=5µs Topt=25°C
2.84
2.83
6.0
5.0
VIN
2.82
2.81
4.0
3.0
VOUT
2.80
2.79
2.78
2.0
1.0
0.0
0
0
0
10
20
20
20
30
30
30
40
50
60
70
80
90
100
Time t(µs)
R5322N001× (2.8V, VR2)
IOUT=30mA COUT=tantal 2.2µF
tr/tf=5µs Topt=25°C
2.84
2.83
6.0
5.0
VIN
2.82
2.81
4.0
3.0
VOUT
2.80
2.79
2.78
2.0
1.0
0.0
10
40
50
60
70
80
90
100
Time t(µs)
R5322N001× (2.8V, VR2)
I
OUT=30mA COUT=tantal 6.8µF
tr/tf=5µs Topt=25°C
2.84
2.83
6.0
5.0
VIN
2.82
2.81
4.0
3.0
VOUT
2.80
2.79
2.78
2.0
1.0
0.0
10
40
50
60
70
80
90
100
Time t(µs)
18
R5322N
11) Load Transient Response
3.00
R5322N001× (VR1=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
C
OUT=tantal 1.0µF tr/tf=5µs Topt=25°C
150
100
50
2.95
2.90
I
OUT1
2.85
0
V
OUT1
2.80
2.75
2.70
2.80
2.75
V
OUT2
I
OUT2=30mA
-2
0
2
4
6
8
10
12
14
16
18
Time t(µs)
R5322N001× (VR1=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
OUT=tantal 2.2µF tr/tf=5µs Topt=25°C
C
3.00
150
100
50
2.95
2.90
I
OUT1
2.85
0
V
V
OUT1
2.80
2.75
2.70
2.80
2.75
OUT2
I
OUT2=30mA
-2
0
2
4
6
8
10
12
14
16
18
Time t(µs)
R5322N001× (VR1=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
OUT=tantal 6.8µF tr/tf=5µs Topt=25°C
C
3.00
150
100
50
2.95
2.90
I
OUT1
2.85
0
V
V
OUT1
2.80
2.75
2.70
2.80
2.75
OUT2
I
OUT2=30mA
-2
0
2
4
6
8
10
12
14
16
18
Time t(µs)
19
R5322N
R5322N001× (VR2=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
OUT=tantal 1.0µF tr/tf=5µs Topt=25°C
C
3.00
150
100
50
2.95
2.90
I
OUT2
2.85
0
V
V
OUT1
OUT2
2.80
2.75
2.70
I
OUT1=30mA
2.80
2.75
-2
-2
-2
0
2
2
2
4
4
4
6
8
10
12
14
16
18
Time t(µs)
R5322N00× (VR2=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
OUT=tantal 2.2µF tr/tf=5µs Topt=25°C
C
3.00
150
100
50
2.95
2.90
I
OUT2
2.85
0
V
V
OUT1
OUT2
2.80
2.75
2.70
I
OUT1=30mA
2.80
2.75
0
6
8
10
12
14
16
18
Time t(µs)
R5322N00× (VR2=2.8V)
I
OUT=50mA 100mA VIN=3.8V CIN=tantal 1.0µF
OUT=tantal 6.8µF tr/tf=5µs Topt=25°C
C
3.00
150
100
50
2.95
2.90
I
OUT2
2.85
0
V
V
OUT1
OUT2
2.80
2.75
2.70
I
OUT1=30mA
2.80
2.75
0
6
8
10
12
14
16
18
Time t(µs)
20
R5322N
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 2.2µF or more capacitance COUT with good frequency characteristics and ESR (Equivalent Se-
ries Resistance) of which is 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 (Avg.) are marked as the hatched area in the graph.
(Note: When a ceramic capacitor is connected to the Output Pin as Output capacitor for phase compensation, the op-
eration might be unstable unless as much as 1Ω resistor is connected between the capacitor and GND instead of ESR.
Test these ICs with as same external components as ones to be used on the PCB.)
<Test conditions>
(1) VIN=3.8V
(2) Frequency band: 10Hz to 2MHz
(3) Temperature: 25°C
R5322N001× (VR1=2.8V)
R5322N001× (VR1=2.8V)
C
IN=Ceramic 1.0µF
C
IN=Ceramic 2.2µF
C
OUT=Ceramic 2.2µF
C
OUT=Ceramic 2.2µF
100
10
100
10
1
1
0.1
0.01
0.1
0.01
0
20
4
080 60100
120
0
20
4
080 60100
120
Output Current IOUT1(mA)
Output Current IOUT1(mA)
21
R5322N
R5322N001× (VR2=2.8V)
R5322N001× (VR2=2.8V)
C
IN=Ceramic 1.0µF
C
IN=Ceramic 2.2µF
C
OUT=Ceramic 2.2µF
C
OUT=Ceramic 2.2µF
100
100
10
10
1
1
0.1
0.01
0.1
0.01
0
20
4
080 60100
120
0
20
4
080 60100
120
Output Current IOUT2(mA)
Output Current IOUT2(mA)
• Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work
correctly.
• Connect the capacitor with a capacitance of 1µF or more between VDD and GND as close as possible.
• Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
22
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