LTC3851EGN#PBF

DC DC Switching Controllers Overview

The LTC3851EGN#PBF is a synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4V to 38V and supports output voltages from 800mV to 5.5V. The device features a fixed 500kHz switching frequency, though it can be adjusted between 250kHz and 750kHz. It delivers up to 25A output current with a maximum duty cycle of 99%. Key electrical parameters include a quiescent current of 20µA and a supply current of 1.2mA. The component is housed in a 16-lead SSOP package and functions within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Constant frequency current mode architecture for stable regulation
• Integrated soft-start and tracking capabilities for synchronized power sequencing
• DCR sense circuit support to utilize inductor DC resistance for current sensing
• Capable of driving all N-channel synchronous power MOSFET stages

DC DC Switching Controllers Applications

• Distributed power systems requiring high efficiency
• Industrial equipment power management
• Telecommunications infrastructure
• Point-of-load (POL) conversion modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status through the manufacturer's datasheet. Ensure the ordering part number matches the required operational temperature range and pinout configuration for your PCB layout.

DC DC Switching Controllers Selection Notes

Select this controller when designing single-output buck converters requiring DCR current sensing to minimize external components. It is suitable for applications needing adjustable switching frequencies to optimize efficiency or reduce EMI. Consider the 16-SSOP package constraints for thermal management and board space availability.

DC DC Switching Controllers Part Context

This component belongs to the LTC3851 family of synchronous buck controllers. It is distinct from the LTC3851A variant, which offers higher switching frequencies and extended temperature ranges. The EG suffix indicates the commercial temperature grade and SSOP packaging.

DC DC Switching Controllers Replacement Considerations

LTC3851AEGN#PBF provides similar functionality with extended temperature ratings and higher frequency options.