'2000.7.25
SOT23-6W 120mA 2ch LDO REGULATORS
R5322N SERIES
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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 are SOT-23-6W
package, and include 2ch LDO regulators each, high density mounting of the ICs on boards is possible.
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FEATURES
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Ultra-Low Supply Current......................................... TYP. 75mA(VR1,VR2)
Standby Mode ........................................................... TYP. 0.1mA(VR1,VR2)
Low Dropout Voltage ................................................ TYP. 0.15V(I
OUT
=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)
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APPLICATIONS
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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.
Rev. 1.10
-1-
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BLOCK DIAGRAM
R5322NXXXA
R5322NXXXB
C
1
E1
-
E
rror
6 V
UT1
CE1
1
O
R
1_1
E
rror
6 V
UT1
O
A p.
m
V
ref
C
urrent Lim
it
-
+
R
2_1
R
1_1
A p.
m
+
R
2_1
V
ref
C
urrent Lim
it
V
D
2
D
-
+
C
urrent Lim
it
R
1_2
5
G D
V
D
2
N
D
R
1_2
E
rror
N
5
GD
-
+
R
2_2
E
rror
A p.
m
V
ref
A p.
m
R
2_2
V
ref
C
3
E2
4 V
UT2
CE2
3
O
C
urrent Lim
it
4 V
OT
U2
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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;
R5322NXXXX-XX
¬Part
Number
- - -
a b c
Code
a
b
c
Contents
Setting combination of 2ch Output Voltage (V
OUT
) : 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.
Designation of Mask Option :
A: Without Nch Tr. for discharge at OFF state.
B: With Nch Tr. for discharge at OFF state.
Designation of Taping Type :
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
Rev. 1.10
-2-
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TEST CIRCUITS
4
I
OUT
2 V
OUT
2
V
C
3
V
OUT2
CE
3
2
R5 22
3 N
SR S
E IE
C3
4 V
OUT2
CE2 3
R5322N
SERIES
5 GND
C
1
N
5
GD
V
DD
2
VDD 2
C1
A
I
SS
I
OUT
1
O
V
UT
1
C
2
6
V
OUT1
CE
1
1
C2
6 V
UT1
O
CE1 1
V
*
Fig.1 Standard test Circuit
C1 = T
antal1.0
mF
C2 = C3 = T
antal2.2
mF
mF
* C1 = 1.0
C2 = C3 = 2.2
mF
Fig.2 Supply Current Test Circuit
O
4
V
UT2
C3
I
OUT
2
C
3
4 V
UT2
O
C 23
E
CE
3
2
R 22N
53
SR S
E IE
5GD
N
V D2
D
P ls
ue
G n ra r
e e to
R5 22
3 N
SR S
E IE
V
2
DD
C
1
I
OUT
2a
I
OUT
2b
5
GD
N
I
OUT
1b
I
OUT
1a
C2
6
V
OUT1
CE
1
1
I
OUT
1
C
2
6 V
UT1
O
C 11
E
P
G
*
C2=C3=2.2
mF
Fig.3 Ripple Rejection, Line Transient Response Test
Circuit
C2 =C3 =2.2
mF
Fig.4 Load Transient Response Test Circuit
*
C1 =1.0
mF
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TYPICAL APPLICATION
OUT2
4
C3
V
OUT2
R5322NXXX X
SERIES
CE2
3
IN
5
OUT1
GND
VDD
2
C1
6
C2
V
OUT1
CE1
1
(External Components) Output Capacitor; Tantalum Type
Rev. 1.10
-5-
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