LTC3857IGN-1#TRPBF

DC DC Switching Controllers Overview

The LTC3857IGN-1#TRPBF is a dual-channel synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 38V and supports output voltages from 800mV to 24V. The device features a low quiescent current of 50µA and a switch frequency of 680kHz. It provides two independent outputs with a maximum output current capability of 25A per channel. The component is housed in a 28-SSOP package and functions across a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture driving all N-channel synchronous power MOSFET stages for high efficiency
• Low quiescent current operation designed to minimize power consumption during standby or light load conditions
• Integrated DCR current sensing capability for accurate phase current sharing and protection
• Supports flexible control features including enable, frequency control, soft start, and tracking

DC DC Switching Controllers Applications

• High efficiency dual 3.3V/8.5V step-down converter designs
• Dual 1V/1.2V step-down converters utilizing inductor DCR current sensing
• Industrial and distributed power supply systems requiring multi-rail regulation
• Embedded systems needing synchronized buck conversion with low static current

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the part number corresponds to the SSOP-28 package variant rather than other available packages. Ensure compatibility with the required input voltage range of 4V to 38V for the target application design.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual isolated or non-isolated outputs from a single input rail. The device is suitable for designs prioritizing low quiescent current and precise current sharing via DCR sensing. Consider the thermal performance of the SSOP-28 package relative to the expected 25A output current requirements.

DC DC Switching Controllers Part Context

This component belongs to the PolyPhase series of power management ICs from Analog Devices. It is part of the LTC3857 family, which includes variants such as the LTC3857EGN-1#PBF. The device serves as a core controller for synchronous buck converters, distinct from integrated power stage solutions.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.