LTC1439CGW#TRPBF

DC DC Switching Controllers Overview

The LTC1439CGW#TRPBF is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 28V and supports output voltages of 2.5V and 3.3V. The device delivers up to 5A at 2.5V and 4A at 3.3V. It utilizes a phase-lockable fixed frequency architecture with a maximum switching frequency of 400kHz. The controller drives external N-channel power MOSFETs and features a low noise 12V linear regulator. It is housed in a 36-lead SSOP package.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck topology for independent multi-rail generation
• Integrated low noise 12V linear regulator for auxiliary power
• Phase-lockable fixed frequency operation for synchronization
• Independent enable and soft-start control for staggered startup

DC DC Switching Controllers Applications

• High efficiency 3.3V/2.5V step-down regulation circuits
• Automotive power supply systems requiring dual outputs
• Industrial equipment needing synchronized switching frequencies
• Systems requiring low noise auxiliary power rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging with lead-free finish. Confirm the CGW variant meets the specified commercial temperature range of 0°C to 70°C. Ensure the 36-SSOP footprint matches the PCB layout requirements. Cross-reference the datasheet revision date to confirm compatibility with current design specifications.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated or related DC-DC rails are required from a single controller. It is suitable for applications demanding high efficiency and precise voltage regulation. Consider the external MOSFET selection based on the 400kHz maximum frequency limit. Evaluate the thermal performance of the 36-SSOP package for the intended load conditions.

DC DC Switching Controllers Part Context

This part belongs to the LTC1439 family of dual synchronous buck controllers. It shares architectural similarities with the LTC1438 but offers specific pinout and feature configurations for dual-output designs. The device is designed to replace older discrete solutions or single-controller approaches in compact power management modules.

DC DC Switching Controllers Replacement Considerations

The LTC1439CG#PBF is listed as a direct substitute, differing primarily in tube versus tape-and-reel packaging. Verify that the non-PBF version meets the same electrical characteristics and package dimensions before substitution.