Automotive ICs

Automotive, 125°C Operation, 36 V Input, 400 mA Voltage Regulator with Reset Function S-19312 Series

The S-19312 Series, developed by using high-withstand voltage CMOS technology, is a positive voltage regulator with the reset function, which has high-withstand voltage and high-accuracy output voltage. This IC has a built-in low on-resistance output transistor which provides a 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.
High heat radiation TO-252-5S(A) and HSOP-8A packages enable high-density mounting.

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


Regulator block

Output voltage
3.0 V to 5.3 V, selectable in 0.1 V step
Input voltage
4.0 V to 36.0 V
Output voltage accuracy
±2.0% (Tj = −40°C to +150°C)
Dropout voltage
120 mV typ.
(5.0 V output product, IOUT = 100 mA)
Output current
Possible to output 400 mA
(VIN = VOUT(S) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 2.2 μF or more can be used.
Ripple rejection
70 dB typ. (f = 100 Hz)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Detection temperature 170°C typ.

Detector block

Detection voltage
2.6 V to 5.0 V, selectable in 0.1 V step
Detection voltage accuracy
±100 mV (Tj = −40°C to +150°C)
Hysteresis width
0.12 V min.
Release delay time
18 ms typ. (CDLY = 47 nF)
Output form
Nch open-drain output (Built-in pull-up resistor)


Current consumption
During operation:
60 μA typ., 95 μA max. (Tj = −40°C to +150°C)
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 and reset circuit for automotive electric component
  • For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)