Power Management ICs

5.5 V Input, 300 mA Voltage Regulator S-1135 Series

S-1135 Series, developed using the CMOS technology, is a positive voltage regulator IC which has the low dropout voltage (LDO), the high-accuracy output voltage and the low current consumption (300 mA output current). A 1.0 µF small ceramic capacitor can be used. It operates with low current consumption of 45 µA typ. The overcurrent protection circuit prevents the load current from exceeding the capacitance of output transistor. The power-off circuit ensures longer battery life. Various capacitors, also small ceramic capacitors, can be used for this IC more than for the conventional regulator ICs which have CMOS technology. Furthermore a small SOT-89-5, SOT-23-5, and HSNT-6A packages realize high-density mounting.


Output voltage
1.0 V to 3.5 V, selectable in 0.05 V step.
Low equivalent series resistance capacitor
Ceramic capacitor of 1.0 µF or more can be used as the I/O capacitor.
Wide input voltage range
1.5 V to 5.5 V
High-accuracy output voltage
±1.0% (1.0 V to 1.45 V output product±15 mV)
Low dropout voltage (LDO)
160 mV typ. (products having the output of 2.6 V, IOUT = 300 mA)
Low current consumption
During operation: 45 µA typ., 65 µA max.
During power-off: 0.1 µA typ., 1.0 µA max.
Output current
Possible to output 300 mA (at VIN ≥ VOUT(S) + 1.0 V) (*1)
High ripple rejection
70 dB typ. (at 1.0 kHz, VOUT = 1.0 V)
Built-in overcurrent protection circuit
limits overcurrent of output transistor
Built-in ON / OFF circuit
Ensures long battery life.
Discharge shunt function “available” / “unavailable” is selectable.
Pull-down function “available” / “unavailable” is selectable.
Lead-free product

*1. Attention should be paid to the power dissipation of the package when the output current is large.


  • Power supply for battery-powered devices
  • Power supply for cellular phones
  • Power supply for portable equipment