LTC3857EGN-1#PBF

DC DC Switching Controllers Overview

The LTC3857EGN-1#PBF is a low quiescent current, dual output synchronous buck controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4 V to 38 V and supports output voltages from 800 mV to 24 V. The device delivers up to 25 A output current with two independent outputs. Key electrical parameters include a static current of 50 uA, a fixed switching frequency of 680 kHz, and load regulation of 0.01%. It functions in temperatures from -40°C to +125°C and is housed in a 28-lead SSOP package.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture for independent synchronous step-down control
• Low quiescent current operation for enhanced efficiency
• Supports N-channel MOSFET stages with DCR current sensing capability

DC DC Switching Controllers Applications

• High efficiency dual 1V/1.2V step-down converters
• Efficient 2-phase 12V/150W step-down conversion
• Dual 3.3V/8.5V power supply designs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the SSOP-28 package dimensions match your PCB footprint requirements. Ensure the 680 kHz fixed frequency aligns with your EMI constraints. Check for any recent PCN updates regarding manufacturing site changes or design specifications before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated rails are required from a single controller. The low 50 uA IQ suits battery-powered or standby-sensitive applications. Verify that the 4 V minimum input voltage meets your system's lowest operating condition. Consider thermal management for the SSOP package given the 25 A total current capacity across two phases.

DC DC Switching Controllers Part Context

This part belongs to the LTC3857 family of PolyPhase controllers. It is distinct from the single-output LTC3851 and the higher performance LTC3858. The EG suffix denotes the commercial temperature grade and SSOP package. The -1 variant typically implies specific pinout or feature configurations compared to the base LTC3857 model.

DC DC Switching Controllers Replacement Considerations

LTC3857IGN-1#PBF offers the same functionality in an industrial temperature grade (-40°C to +125°C) within a 28-SSOP package. Verify if the extended temperature range is necessary for your application environment.