R1121N Datasheet, PDF (5/16 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

s OPERATION
R1121NXX1A
R1121NXX1B
3
VDD
CE
4
Vref
Current Limit
1
VOUT
3
VDD
R1
R2 _GND
CE
2
4
Vref
Current Limit
1
VOUT
R1
R2 _GND
2
In these ICs, fluctuation of Output Voltage, VOUT is detected by Feed-back Registers, R1 and R2, and the result is compared
with a reference voltage by Error Amplifier, so that a constant voltage is output.
A current limit circuit for protection at short mode and a chip enable circuit are included.
Rev.1.11
-5-