R1122N_17 Datasheet, PDF (6/21 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

R1122N
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Output Voltage
VOUT (V)
1.5 ^<= VOUT ^<= 1.6
1.7 ^<= VOUT ^<= 1.8
1.9 ^<= VOUT ^<= 2.3
2.4 ^<= VOUT ^<= 2.7
2.8 ^<= VOUT ^<= 5.0
Dropout Voltage
VDIF (V)
Condition
Typ.
0.32
0.28
IOUT = 100mA
0.25
0.20
0.19
Topt = 25°C
Max.
0.55
0.47
0.35
0.29
0.26
OPERATION
R1122Nxx1A
3
VDD
CE
4
_
+
Vref
Current Limit
1
VOUT
R1
R2 _GND
2
3
VDD
CE
4
R1122Nxx1B
_
+
Vref
Current Limit
1
VOUT
R1
R2 _GND
2
In these ICs, fluctuation of the output voltage, VOUT is detected by feed-back registers R1, R2, and the result is
compared with a reference voltage by the 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.
6