Automotive ICs

Automotive, 125°C Operation, 5.5V Input, 600 mA, Power Good, Synchronous Step-Down Switching Regulator S-19952/19953 Series

This IC is a secondary step-down switching regulator developed using CMOS process technologies with a built-in Power Good function.
PWM control (S-19952 Series) or PWM / PFM switching control (S-19953 Series) can be selected as an option.
S-19952 Series, which features PWM control, can be used without interfering with AM radio bands.
Since the S-19953 Series, which features PWM / PFM switching control, operates with PWM control under heavy load and automatically switches to PFM control under light load. It achieves high-efficiency operation in accordance with the device’s status.
This IC is implemented as a small package and can comprise an application circuit with a coil and two capacitors at the minimum configuration. Since the switching frequency is as high as 2.25 MHz, and the peripheral parts can be made compact, the IC is suitable for space-saving uses.

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.


Input voltage
2.7 V to 5.5 V
Output voltage
0.8 V to 3.3 V
Output current
600 mA
VOUT pin detection voltage accuracy
±1.5% (Tj = −40°C to +125°C)
Oscillation frequency
2.25 MHz typ.
Overcurrent protection function
1.1 A typ. (pulse-by-pulse method)
Thermal shutdown function
170°C typ. (detection temperature)
Short-circuit protection function
Hiccup control, Latch control
100% duty cycle operation
Output discharge function
“Available ” / “Unavailable ” is selectable.
Power Good function
Nch open-drain output
Soft-start function
0.35 ms typ.
Under voltage lockout function (UVLO)
2.43 V typ. (detection voltage)
Input and output capacitors
Ceramic capacitor compatible
Operation temperature range
Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
AEC-Q100 in process*1

Remark: HTMSOP-8 package:Under development

*1. Contact our sales representatives for details.


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

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.