SIC403ACD-T1-GE3

Overview

The SIC403ACD-T1-GE3 is a synchronous step-down DC/DC converter from Vishay Siliconix, part of the Microbuck series. It operates with an input voltage range of 3 V to 28 V and delivers a continuous output current of 6 A. The device supports programmable switching frequencies between 200 kHz and 1 MHz and provides adjustable output voltages from 750 mV to 5.5 V. It features an integrated bootstrap switch and a programmable 200 mA LDO with bypass logic. The component achieves high efficiency exceeding 93% and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated bootstrap switch eliminates external high-side drive components
• Programmable 200 mA low-dropout regulator with bypass logic for auxiliary power
• High efficiency design exceeding 93% under typical operating conditions

Applications

• Point-of-load regulation in industrial equipment
• Power supply stages for embedded computing systems
• Voltage conversion for communication infrastructure modules

Procurement Notes

Verify the specific suffix GE3 confirms lead-free compliance and halogen-free status as per Vishay standards. Confirm the MLPQ55-32 package variant matches your PCB footprint requirements. Check current lifecycle status as product availability may vary by region. Ensure thermal management solutions align with the 125°C maximum junction temperature specification.

Selection Notes

Select this component when a compact synchronous buck solution is required for inputs up to 28 V. The integrated LDO simplifies biasing for control circuits without additional regulators. Consider the programmable frequency range for optimizing inductor size versus switching losses. Verify that the 6 A output capability meets the peak load demands of the target application circuit.

Part Context

This part belongs to the SIC403 family of Microbuck converters designed for high-density power applications. It integrates power switches and control logic into a single MLPQ55-32 package. The series emphasizes efficiency and thermal performance for space-constrained designs. It serves as a direct replacement for older discrete or less integrated buck controller solutions.

Replacement Considerations

SIC403CD-T1-GE3 is a confirmed alternative within the same family. Verify if the CD variant offers identical electrical characteristics for your specific design needs.