LT3437HFE#TRPBF

Overview

The LT3437HFE#TRPBF is a high voltage, step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.3 V to 60 V and provides an adjustable output voltage. The device delivers up to 400 mA of output current at a fixed switching frequency of 200 kHz. It features a low quiescent current of 100 µA and a shutdown supply current of 75 µA. The component is housed in a TSSOP-EP-16 package and supports operation within a temperature range of -40°C to +140°C.

Feature Summary

• Integrated high voltage buck topology supporting inputs up to 60 V
• Low power consumption with 100 µA quiescent current
• Thermal enhanced package for improved heat dissipation
• Fixed 200 kHz switching frequency for compact external component sizing

Applications

• Industrial control systems requiring isolated or non-isolated power rails
• Automotive electronics operating from high voltage bus lines
• Battery-powered equipment needing efficient step-down conversion
• General purpose power management in space-constrained designs

Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm the HFE variant meets the required industrial temperature grade specifications. Ensure the TSSOP-EP-16 footprint matches the target PCB layout. Cross-reference the manufacturer's latest datasheet for any recent design changes or compliance updates before finalizing procurement plans.

Selection Notes

Select this regulator when input voltages exceed standard low-voltage converter limits but remain below 60 V. The 400 mA output current capability suits moderate load applications. Consider the 200 kHz frequency trade-off between efficiency and passive component size. Evaluate thermal performance requirements given the 140°C maximum junction temperature rating and surface mount package constraints.

Part Context

This component belongs to the LT3437 series of high voltage switching regulators. It complements other Linear Technology (now Analog Devices) products designed for robust power management in demanding environments. The series emphasizes reliability and efficiency in step-down configurations without requiring complex external feedback networks.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.