Power Management ICs

5.5 V Input, 300 mA Voltage Regulator S-1333 Series

The S-1333 Series, developed by using the CMOS technology, is a positive voltage regulator IC which has low current consumption, high ripple-rejection and low dropout voltage.
Even with low current consumption of 25 μA typ., it has high ripple-rejection of 75 dB typ., and a ceramic capacitor of 1.0 μF or more can be used as the input and output capacitors. 
It also has high-accuracy output voltage of ±1.0%.


Output voltage
1.0 V to 3.5 V, selectable in 0.05 V step
Input voltage
1.5 V to 5.5 V
Output voltage accuracy
±1.0% (1.0 V to 1.45 V output product: ±15 mV)
Dropout voltage
160 mV typ. (2.8 V output product, Iout = 100 mA)
Current consumption
During operation: 25 µA typ., 38 µA max.
During power-off: 0.1 µA typ., 1.0 µA max.
Output current
Possible to output 300 mA (VOUT(S) ≥ 1.3 V, VIN ≥ VOUT(S) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 1.0 μF or more can be used.
Ripple rejection
75 dB typ. (1.6 V output product, f = 1.0 kHz)
70 dB typ. (2.85 V output product, f = 1.0 kHz)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Prevents damage caused by heat.
Built-in ON / OFF circuit
Ensures long battery life.
Discharge shunt function "available" / "unavailable" is selectable.
Pull-down function "available" / "unavailable" is selectable.
Operation temperature range
Ta = −40°C to +85°C
Lead-free (Sn 100%), halogen-free

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


  • Constant-voltage power supply for portable communication device, digital camera, and digital audio player
  • Constant-voltage power supply for battery-powered device
  • Constant-voltage power supply for home electric appliance

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.