Automotive ICs

Automotive, 125°C Operation, 36V Input, 600 mA Synchronous Step-Down Switching Regulator S-19902A/19902B/19903A/19903B Series

Oscillation frequency: 2.2 MHz typ. product | 400 kHz typ. product

The industry’s smallest The S-19902/3 Automotive, 125°C operation, 36V input, 600mA, Synchronous Step-down Switching Regulator HSNT-6(2025) package

The S-19902/19903 Series is a step-down switching regulator developed using high withstand voltage CMOS process technologies.
This IC has high maximum operation voltage of 36 V and maintains high-accuracy FB pin voltage at ±1.5%. As suitable packages for high-density mounting, such as small-sized HSNT-6(2025), are adopted, this IC contributes to miniaturization of electronic equipment.
PWM control (S-19902 Series) or PWM / PFM switching control (S-19903 Series) can be selected as an option.
Since the S-19903 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. Furthermore, our distinctive PWM / PFM switching control technology suppresses the ripple voltage to be generated in VOUT while PFM control is in operation.
Since the S-19902/19903 Series has the built-in synchronous circuit, it achieves high efficiency easier compared with conventional step-down switching regulators. In addition, it has the built-in overcurrent protection circuit which protects the IC and coils from excessive load current as well as a thermal shutdown circuit which prevents damage from heat generation.

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
4.0 V to 36.0 V
Output voltage (externally set)
2.5 V to 12.0 V
Output current
600 mA
FB pin voltage accuracy
Oscillation frequency
2.2 MHz typ.
Overcurrent protection function
1.2 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
Soft-start function
5.8 ms typ.
Under voltage lockout function (UVLO)
3.35 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
Withstand 45 V load dump
AEC-Q100 qualified*1

*1. Contact our sales representatives for details.


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