PRELIMINARY
R5323N SERIES
s
OUTLINE
'2001.6.24
SOT23-6 150mA 2ch LDO REGULATORS
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.
s
FEATURES
Low Supply Current .................................................. TYP. 90µA(VR1,VR2)
Standby Mode ........................................................... TYP. 0.1µA(VR1,VR2)
Low Dropout Voltage ................................................ TYP. 0.22V(I
OUT
=150mA Output Voltage=3.0V Type)
High Ripple Rejection ............................................... TYP. 75dB(V
OUT
≤2.4V),
TYP. 70dB(V
OUT
≥2.5V)
(f=1kHz)
........................................................................................... TYP. 65dB(V
OUT
≤2.4V),
TYP. 60dB(V
OUT
≥2.5V)
(f=10kHz)
Low Temperature-Drift Coefficient of Output Voltage TYP. ±100ppm/°C
Excellent Line Regulation ......................................... TYP. 0.02%/V
High Output Voltage Accuracy.................................. ±2.0%
Small Package ..........................................................SOT-23-6
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)
Ceramic Capacitor is recommended. (1µF or more)
s
APPLICATIONS
Power source for handheld communication equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
Rev. 0.05
-1-
s
BLOCK DIAGRAM
R5323NXXXA
R5323NXXXB
C1
6
E
-
E
rror
1 V
C1
E
O T1
U
R
1_1
A p.
m
+
R
2_1
C
urrent Lim
it
6
E
rror
1
A p.
m
V
ref
-
+
R
2_1
R
1_1
V
UT1
O
V
ref
V
DD
2
-
+
C
urrent Lim
it
R
1_2
5
C
urrent Lim
it
G D
V
D
2
N
D
A p.
m
-
+
R
2_2
R
1_2
N
5
GD
E
rror
A p.
m
V
ref
E
rror
R
2_2
V
ref
C2
4
E
3 V
UT2
C 2
E
O
4
C
urrent Lim
it
3
V
UT2
O
s
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
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 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.)
Rev. 0.05
-2-
s
ELECTRICAL CHARACTERISTICS
q
R5323NXXXA/B
Symbol
V
OUT
I
OUT
∆V
OUT
/∆I
OUT
V
DIF
I
SS
Istandby
∆V
OUT
/∆V
IN
Item
Conditions
MIN.
TYP.
V
IN
= Set V
OUT
+1V
V
OUT
×0.98
1mA
≤
I
OUT
≤
30mA
V
IN
- V
OUT
= 1.0V
150
V
IN
= Set V
OUT
+1V
15
40
mV
1mA
≤
I
OUT
≤
150mA
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
V
IN
= Set V
OUT
+1V
90
120
µA
V
IN
= Set V
OUT
+1V
0.1
1.0
µA
V
CE
= GND
Set V
OUT
+0.5V
≤
V
IN
≤
6V
0.02
0.10
%/V
I
OUT
= 30mA
Ripple 0.5Vp-p V
IN
= Set
75
V
OUT
+1V
*Note1
I
OUT
= 30mA
dB
65
( In case that V
OUT
≤1.7V,
*Note2
V
IN
= Set V
OUT
+1.2V)
2.0
6.0
V
ppm
I
OUT
= 30mA
±100
/°C
-40°C
≤
Topt
≤
85°C
V
OUT
= 0V
40
mA
0.7
2.0
8.0
MΩ
1.5
0.0
BW=10Hz to 100kHz
V
CE
=0V
30
60
V
IN
0.3
V
V
µVrms
Ω
Topt=25°C
MAX.
Unit
V
OUT
V
×1.02
mA
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
RR
V
IN
∆V
OUT
/∆T
Ilim
R
PD
V
CEH
V
CEL
e
n
Ripple Rejection
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE Pull-down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
Low Output Nch Tr. ON
R
LOW
Resistance (of B version)
Note1: f=1kHz, 70dB as to V
OUT
≥2.5V
Output type.
Note2: f=10kHz, 60dB as to V
OUT
≥2.5V
Output type.
q
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Output Voltage
V
OUT
(V)
V
OUT
= 1.5
V
OUT
= 1.6
V
OUT
= 1.7
1.8
≤
V
OUT
≤
2.0
2.1
≤
V
OUT
≤
2.7
2.8
≤
V
OUT
≤
4.0
Dropout Voltage
V
DIF
(V)
Condition
TYP.
0.38
0.35
I
OUT
= 150mA
0.33
0.32
0.28
0.22
MAX.
0.70
0.65
0.60
0.55
0.50
0.35
*Recommended Ceramic capacitor for Output: GRM219R61A105K(Murata)
General Example of External Components
Ceramic Capacitors: C1608X5R0J105K (TDK)
GRM188R60J105K (Murata)
Rev. 0.05
-4-
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