LTC3851AEUD-1#PBF

DC DC Switching Controllers Overview

The LTC3851AEUD-1#PBF is a synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4 V to 38 V and supports output voltages from 800 mV to 5.5 V. The device delivers up to 25 A of output current through a single output channel. It features a constant frequency current mode architecture with a switchable frequency between 250 kHz and 750 kHz. The component functions within a temperature range of -40°C to +125°C and utilizes a 16-pin QFN package.

DC DC Switching Controllers Feature Summary

• Drives all N-channel synchronous power MOSFET stage for high efficiency
• Constant frequency current mode architecture allows phase-lockable operation
• Mode selector enables forced CCM, pulse skip, or burst mode operation

DC DC Switching Controllers Applications

• High efficiency synchronous step-down DC/DC conversion
• Point-of-load regulation in industrial systems
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the 16-QFN (3x3 mm) package dimensions match the PCB footprint requirements. Ensure the operating temperature range meets the environmental specifications of the final assembly. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm availability status.

DC DC Switching Controllers Selection Notes

Select this controller when a wide input voltage range up to 38 V is required for buck applications. Choose this component for designs needing precise load regulation and programmable switching frequencies. Consider this part for systems requiring flexible light-load efficiency modes such as pulse skip or burst operation. Verify that the external MOSFET selection aligns with the 25 A current capability and thermal constraints.

DC DC Switching Controllers Part Context

This component belongs to the LTC3851A-1 series of high-performance synchronous step-down switching regulator controllers. It is designed to drive full N-channel synchronous power MOSFET stages. The series offers robust performance for demanding power management applications requiring high efficiency and wide input voltage tolerance.

DC DC Switching Controllers Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers. Do not assume functional equivalence with other models without checking pinout and electrical specifications.