Automotive ICs

Automotive, 105°c Operation, 5.5 V Input, 150 mA Voltage Regulator S-19251 Series

The S-19251 Series, developed by using CMOS process technology, is a positive voltage regulator with a low current consumption, high ripple-rejection and high-accuracy output voltage.
This IC has high ripple-rejection of 75 dB typ., and operates with low current consumption of 20 μA typ.
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. In addition to the conventional package SOT-23-5, the super-small packages HSNT-4(1010)B and HSNT-4(0808)B are added to the lineup, which realizes higher-density mounting.

Thermal simulation service
ABLIC Inc. offers a “thermal simulation service” which supports the thermal design in conditions when our power management ICs are in use by customers. Our thermal simulation service will contribute to reducing the risk in the thermal design at customers development stage.
For more information regarding our thermal simulation service, contact our sales representatives.

FIT rate calculation
ABLIC Inc. offers FIT rate calculated based on actual customer usage conditions in order to support customer functional safety design.
For more information regarding our FIT rate calculation, contact our sales representatives.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product for these purposes, it is imperative to contact our sales representatives.


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
±2.5% (Tj = −40°C to +105°C)
Current consumption
During operation: 20 μA typ., 50 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)
Dropout voltage
0.16 V typ. (2.8 V output product, IOUT = 100 mA)
Output current
Possible to output 150 mA (VIN ≥ VOUT(S) + 1.0 V)*1
Ripple rejection
75 dB typ. (1.2 V output product, f = 1.0 kHz)
70 dB typ. (2.8 V output product, f = 1.0 kHz)
Input capacitor
A ceramic capacitor can be used. (1.0 μF or more)
Output capacitor
A ceramic capacitor can be used. (1.0 μF or more)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Detection temperature 150°C typ.
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 +105°C
Lead-free (Sn 100%), halogen-free
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 representatives for details.


  • For automotive use (meter, car body, headlight, ITS, accessory, car navigation system, car audio system, etc.)
    : SOT-23-5 package product
  • For automotive use (accessory, car navigation system, car audio system, etc.)
    : HSNT-4(1010)B package product, HSNT-4(0808)B package product

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.