'2001.7.10
SOT23-6 150mA 2ch LDO REGULATORS
R5323N SERIES
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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.
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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)
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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. 1.10
-1-
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
