SIC431AEVB-A: 1V, 3.3V, 5V or 12V @ 20A, 3V ~ 24V, Buck

Summary

The SiC431 is from a family of synchronous buck regulators with integrated high side and low side power MOSFETs. Its power stage is capable of supplying up to 24 A (Eval board = 20 A max) continuous current at 1 MHz switching frequency. This regulator produces an adjustable output voltage down to 0.6 V from 3 V to 24 V input rail to accommodate a variety of applications, including computing, consumer electronics, telecom, and industrial.

The SiC43x series employs a constant on time control architecture that supports ultrafast transient response with minimum output capacitance and tight ripple regulation at very light load. The device is internally compensated and no external ESR network is required for loop stability purposes.

The device also incorporates a power saving scheme that significantly increases light load efficiency. The regulator integrates a full protection feature set, including output over voltage protection (OVP), cycle by cycle over current protection (OCP) short circuit protection (SCP) and thermal shutdown (OTP). It also has UVLO and a user programmable soft start.

The SiC43x series is available in lead (Pb)-free power enhanced MLP44-24L package in 4 mm x 4 mm dimension.

Specifications

Manufacturer	Vishay Siliconix
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	742-SIC431AEVB-A-ND
Eval Board Supplier	Vishay Siliconix
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1 V 3.3 V 5 V 12 V
Current Out	20 A
Voltage In	3 ~ 24 V
Efficiency @ Conditions	>94%, 12V in, 5V @ 3 ~ 20A >92%, 12V in, 3.3V @ 3 ~ 20A >89%, 12V in, 1.2V @ 1 ~ 17 A
Voltage Out Range	0.6 ~ 90% Vin
Features	Current Limit (Adj. or Fixed) Light Load Mode Over Current Protection Over Voltage Protection Power Good Output Pre-Biased Startup Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	300 kHz 500 kHz 750 kHz 1 MHz
Standby Current [Typical]	1 µA
Quiescent Current [Typical]	50 µA
Component Count + Extras	33 + 20
Internal Switch	Yes
Design Author	Vishay Siliconix
Application / Target Market	Drones Networking Power Tools Robotics Servers
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	SiC431
Date Created By Author	2020-06
Date Added To Library	2025-08