Power Management ICs

28 V Input, 200 mA Voltage Regulator S-1222B/D Series

The S-1222B/D Series, developed by using high-withstand voltage CMOS process technology, is a positive voltage regulator with a high-withstand voltage, low current consumption and high-accuracy output voltage, and has a built-in ON / OFF circuit.
The S-1222B/D Series operates at the maximum operation voltage of 28 V and a low current consumption of 6.5 μA typ., and has a built-in low on-resistance output transistor which provides a very small dropout voltage and a large output current. Also, a built-in overcurrent protection circuit to limit overcurrent of the output transistor and a built-in thermal shutdown circuit to limit heat are included.


Output voltage
2.3 V to 12.0 V, selectable in 0.1 V step
Input voltage
3.0 V to 28 V
Output voltage accuracy
±1.0% (Ta = +25°C)
Current consumption
During operation: 6.5 μA typ. (Ta = +25°C)
During power-off: 0.1 μA typ. (Ta = +25°C)
Output current
Possible to output 200 mA (at VIN ≥ VOUT(S) + 2.0 V)*1
Input capacitor
A ceramic capacitor can be used. (1.0 μF or more)
Output capacitor
A ceramic capacitor can be used. (1.0 μF to 100 μF)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Detection temperature 165°C typ.
Built-in ON / OFF circuit
Ensures long battery life.
Discharge shunt function is available.
Operation temperature range
Ta = -40°C to +85°C
Lead-free, Sn 100%, halogen-free

*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.


  • Constant-voltage power supply for industrial equipment
  • Constant-voltage power supply for home electric appliance
  • Constant-voltage power supply for smartcard

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.