TPS51285BRUKT

Overview

The TPS51285BRUKT is a dual synchronous step-down controller from the Texas Instruments TPS51285B series, housed in a WQFN-20 package. It operates with an input voltage range of 5 V to 24 V and provides two fixed output voltages between 4.5 V and 5.5 V. The device supports up to 20 A output current per channel with a switching frequency ranging from 400 kHz to 475 kHz. It features ultra-low quiescent current of 84 uA and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low quiescent current design for enhanced light-load efficiency
• Dual synchronous buck topology for independent power rail generation
• Integrated soft-start functionality to manage inrush current during startup

Applications

• LED lighting driver ICs requiring stable low-voltage rails
• Industrial control systems utilizing multiple power domains
• Telecommunications equipment needing efficient DC-DC conversion

Procurement Notes

Verify the specific suffix BRUKT against the official datasheet to confirm the tape-and-reel packaging configuration and moisture sensitivity level. Ensure the ordering part number matches the required RoHS compliance status and quality rating. Cross-reference the manufacturer's latest documentation to validate any recent product change notifications or pinout revisions before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring dual isolated outputs from a single controller with minimal standby power consumption. The fixed output voltage options simplify external feedback network design compared to adjustable regulators. Consider the thermal performance of the WQFN-20 package relative to the expected 20 A load conditions and ambient operating temperatures to ensure reliable long-term operation.

Part Context

This part belongs to the TPS51285B family of ultra-low quiescent current controllers. It shares core architectural similarities with the TPS51285A but offers optimized efficiency characteristics. The series is designed for applications demanding high power density and extended battery life in portable or energy-constrained environments.

Replacement Considerations

The TPS51285BRUKR is a verified alternative variant within the same family, differing primarily in reel quantity rather than electrical function. Verify that the replacement maintains the same WQFN-20 footprint and pin compatibility for direct board substitution.