LT3437IFE#TRPBF

Overview

The LT3437IFE#TRPBF is a high-voltage step-down switching regulator manufactured by Analog Devices. It operates with an input voltage range of 3.3 V to 60 V and provides an adjustable output voltage. The device features a fixed switching frequency of 200 kHz and delivers up to 400 mA of output current. It includes a shutdown function and maintains a low quiescent current of 100 uA. The component is housed in a TSSOP-EP-16 package and supports operation temperatures from -40°C to +140°C.

Feature Summary

• Integrated high-side N-channel switch for simplified external component count
• Fixed 200 kHz switching frequency enables the use of small passive components
• Shutdown pin allows for power management and extended battery life
• Wide input voltage range accommodates various supply sources

Applications

• Industrial control systems requiring isolated or non-isolated DC-DC conversion
• Automotive electronics operating within wide voltage fluctuations
• Portable equipment powered by single-cell lithium-ion batteries
• General-purpose point-of-load regulation in embedded systems

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the IFE variant corresponds to the industrial temperature grade (-40°C to +140°C). Ensure compatibility with the TSSOP-EP-16 footprint during PCB layout. Cross-reference the manufacturer datasheet for latest revision notes and handling precautions.

Selection Notes

Select this component for applications requiring high input voltages up to 60 V with moderate output current needs. The fixed 200 kHz frequency balances efficiency and component size. Consider thermal performance due to the exposed pad requirement in the TSSOP-EP package. Verify that the 400 mA limit meets the load requirements without exceeding junction temperature limits.

Part Context

This part belongs to the LT3437 family of high-voltage buck regulators designed for robust performance in demanding environments. It integrates the main switch and control logic into a compact solution, reducing board space compared to discrete designs. The series is characterized by its ability to handle wide input ranges while maintaining stable regulation under varying load conditions.

Replacement Considerations

LT3437IFE#PBF is a leaded equivalent offering identical electrical specifications but in a tube package instead of tape-and-reel.