LTC3851IUD#PBF

DC DC Switching Controllers Overview

The LTC3851IUD#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 drives all N-channel synchronous power MOSFETs and features a fixed switching frequency of 790kHz. Packaged in a 16-pin QFN with exposed pad, it is rated for operation between -40°C and +85°C.

DC DC Switching Controllers Feature Summary

• Drives all N-channel synchronous power MOSFET stage
• Fixed 790kHz switching frequency architecture
• Supports pulse skip operation for light load efficiency

DC DC Switching Controllers Applications

• High efficiency 3.3V/15A step-down converter designs
• 1.8V/5A converters utilizing pulse skip operation
• General purpose DC to DC conversion systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'IUD' against the manufacturer's official datasheet to confirm the exact temperature grade and package variant. Ensure the '#PBF' designation aligns with lead-free requirements. Cross-reference the part number with authorized distributors to confirm current availability status and compliance documentation prior to procurement.

DC DC Switching Controllers Selection Notes

Select this component when a fixed high-frequency operation near 790kHz is required for compact passive size. It is suitable for applications driving full N-channel MOSFET stages without requiring external level shifters. Consider the thermal performance of the QFN package and ensure the PCB layout supports the exposed pad for adequate heat dissipation under maximum load conditions.

DC DC Switching Controllers Part Context

The LTC3851-1 series belongs to Analog Devices' portfolio of high-performance synchronous buck controllers. This specific model integrates the control logic for efficient DC-to-DC conversion. It is distinct from dual-phase variants like the LTC3851A, focusing on single-output regulation capabilities within a compact surface-mount footprint.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other Analog Devices synchronous buck controllers such as the LTC3851EUD#PBF or LTC3851AEUD#PBF, provided the switching frequency and pinout compatibility are verified. Check datasheets for differences in operating temperature ranges and specific electrical characteristics before substitution.