LT3501IFE

Overview

The LT3501IFE is a dual-output synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.1V to 25V and provides two adjustable positive outputs, each capable of delivering up to 3A. The output voltage is adjustable from 0.8V to 23.75V. The device features a programmable switching frequency ranging from 250kHz to 1.5MHz. It is housed in a 20-lead TSSOP package with an exposed thermal pad for improved heat dissipation. The component supports operation across a junction temperature range of -40°C to +125°C.

Feature Summary

• Dual independent adjustable buck regulators integrated into a single monolithic package
• High current capability with 3A output per channel for demanding power applications
• Programmable switching frequency allows optimization for efficiency or external size
• Integrated thermal pad design facilitates effective heat management in compact layouts

Applications

• Point-of-load regulation for digital signal processors and microcontrollers
• Power supply stages for industrial control systems requiring dual voltage rails
• Battery-powered equipment needing efficient step-down conversion from higher voltages

Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm the IFE designation corresponds to the industrial temperature grade (-40°C to +125°C). Ensure the 20-TSSOP-EP footprint matches the target PCB layout. Cross-reference the manufacturer part number LT3501IFE#TRPBF against official Analog Devices documentation to confirm current production status and RoHS compliance before finalizing procurement.

Selection Notes

Select this component when dual isolated or non-isolated low-voltage rails are required from a single intermediate bus voltage. The 3A per channel rating suits moderate-to-high current loads. Consider the thermal performance of the exposed pad solution if operating near maximum current limits. Verify that the minimum input voltage of 3.1V aligns with the source supply under all load conditions. Check if the adjustable output range covers the specific system requirements without excessive ripple.

Part Context

The LT3501 belongs to the Linear Technology (now Analog Devices) portfolio of high-efficiency DC/DC converters. It is part of a family designed for space-constrained applications requiring multiple regulated outputs. The device replaces discrete solutions using separate controllers and MOSFETs, reducing board area and component count while maintaining high efficiency and transient response characteristics typical of Analog Devices power management ICs.

Replacement Considerations

LT3501EFE#TRPBF is documented as a parameter-equivalent substitute.