© ABLIC Inc., 2009-2015
HIGH RIPPLE-REJECTION LOW DROPOUT
SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
The S-1137 Series, developed using the CMOS technology, is a positive voltage regulator IC which has the low dropout
voltage, the high-accuracy output voltage and the soft-start function (300 mA output current).
A 1.0 F small ceramic capacitor can be used. It operates with low current consumption of 45 A typ.
The overcurrent protection circuit prevents the load current from exceeding the current capacity of the output transistor.
The ON / OFF circuit ensures longer battery life.
Compared to the conventional CMOS technology regulator ICs, various capacitors including small ceramic capacitors can be
used for this IC.
Furthermore, small SOT-89-5, SOT-23-5, and SNT-6A(H) packages realize high-density mounting.
Output voltage accuracy:
Input and output capacitors:
Built-in soft-start circuit:
Built-in overcurrent protection circuit:
Built-in ON / OFF circuit:
Pull-down resistor is selectable.
Discharge shunt function is selectable.
Operation temperature range:
Lead-free, Sn 100%, halogen-free*2
1.2 V to 3.5 V, selectable in 0.05 V step
1.7 V to 5.5 V
1.0% (1.2 V to 1.45 V output product : 15 mV)
210 mV typ. (2.8 V output product, IOUT = 300 mA)
During operation: 45 A typ., 65 A max.
During power-off: 0.1 A typ., 1.0 A max.
Possible to output 300 mA (VIN VOUT(S) 1.0 V)*1
A ceramic capacitor of 1.0 F or more can be used.
70 dB typ. (f = 1.0 kHz)
Soft-start time : 0.7 ms typ. (CSS = 1.0 nF)
Limits overcurrent of output transistor.
Ensures long battery life.
Ta = 40C to 85C
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Refer to “ Product Name Structure” for details.
Constant-voltage power supply for battery-powered device
Constant-voltage power supply for cellular phone, portable device
Constant-voltage power supply for digital still camera, TV, DVD recorder