R1120N Datasheet, PDF (10/24 Pages) RICOH electronics devices division – LOW NOISE 150mA L.D.O REGULATOR

OPERATION
R1120N××1A
VDD 3
CE 4
--
+
Vref
Current Limit
1 VOUT VDD 3
R1
R2
2 GND CE 4
R1120N××1B
--
+
Vref
Current Limit
R1120N
1 VOUT
R1
R2
2 GND
In these ICs, fluctuation in Output Voltage VOUT is detected by Feed-back Registers R1, R2, and the result is compare with
a reference voltage by Error Amplifier, so that a constant voltage is output.
A current limit circuit working for Short Protect and a chip enable circuit are included.
7