Automotive, 105°C Operation, 6.5 V Input, 1000 mA Voltage Regulator With Soft-start Function S-19254xxxH 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.
Accessory, car navigation, car audio system, etc.

The S-19254xxxH Series developed by using high-withstand voltage CMOS process technology, is a positive voltage regulator with high-accuracy output voltage and high output current.
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. Also, the S-19254xxxH Series includes the soft-start function to adjust the output voltage rising time at power-on or at the time when the ON / OFF pin is set to ON.

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.


Output voltage
1.0 V to 5.5 V, selectable in 0.05 V step
Input voltage
2.5 V to 6.5 V
Output voltage accuracy
±3.0% (Tj = −40°C to +105°C)
Dropout voltage
0.38 V typ. (2.6 V output product, at Iout = 1000 mA)
Current consumption
During operation: 120 μA typ., 150 μA max. (Tj = −40°C to +105°C)
During power-off: 0.1 μA typ., 4.5 μA max. (Tj = −40°C to +105°C)
Output current
Possible to output 1000 mA (at Vin ≥ VOUT(S) + 1.0 V)*1
Ripple rejection
60 dB typ. (at f = 1.0 kHz)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Detection temperature 170°C typ.
Built-in soft-start circuit
Adjusts output voltage rising time at power-on or at the time when ON / OFF pin is set to ON.
       Adjustable type: tss = 6.0 ms typ. (Css = 10 nF)
             Soft-start time can be changed by the capacitor (Css).
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.
Operation temperature range
Ta = −40°C to +105°C
Lead-free (Sn 100%), halogen-free
AEC-Q 100 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 (accessory, car navigation system, car audio system, etc.)