For Automotive 125°C Operation High-withstand Voltage Low Dropout CMOS Voltage Regulator S-19212B/DxxA Series

Available Applications
Automotive ICs are categorized according to their application. The following symbols indicate the types of applications for which an IC can be used.
Safety critical components typified by engine, transmission, suspension and ABS, and EV/HEV/PHEV related equipment, etc.
Meter, body, headlamp, ITS, etc.
Accessory, car navigation, car audio system, etc.

The S-19212B/DxxA 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-19212B/DxxA Series operates at the maximum operation voltage of 36 V and a low current consumption of 6.5 μA typ., and has a built-in low on-resistance 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 shutdowncircuit to limit heat are included.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to SII is indispensable.


Output voltage
2.5 V to 16.0 V, selectable in 0.1 V step
Input voltage
3.0 V to 36 V
Output voltage accuracy
±2.0% (Tj = -40°C ~ +125°C)
Current consumption
During operation: 6.5 µA typ., 8.5 µA max. (Tj = −40°C ~ +125°C)

During power-off: 0.1 µA typ., 3.5 µA max. (Tj = −40°C ~ +125°C)
Output current
Possible to output 250 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
Built-in discharge shunt circuit
Discharges the electric charge of the output capacitor during power-off. 
(Rlow = 70 kΩ typ.)
Operation temperature range
Ta=-40°C to +125°C
Lead-free (Sn 100%), halogen-free
Withstand 45 V load dump
AEC-Q100 qualified*2

*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large. 
*2. Contact our sales office for details.


  • Constant-voltage power supply for electrical application for vehicle interior
  • Constant-voltage power supply for home electric appliance
  • For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)