LT3437IFE#PBF

Overview

The LT3437IFE#PBF is a high-voltage monolithic buck 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 features a fixed 200 kHz switching frequency and delivers up to 400 mA of output current. It incorporates a shutdown function with a typical quiescent current of 75 uA during operation and 100 uA in standby. The component is housed in a TSSOP-EP-16 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated high-side switch capable of handling input voltages up to 60 V
• Fixed internal switching frequency eliminates external timing components
• Low power consumption via dedicated shutdown pin for battery conservation
• Adjustable output voltage allows flexible design configurations

Applications

• Industrial control systems requiring isolated or non-isolated step-down conversion
• Automotive electronics operating within wide input voltage ranges
• Portable equipment powered by single-cell lithium-ion batteries
• Distributed power supply architectures in telecommunications infrastructure

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel packaging compatible with standard surface mount assembly processes. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the TSSOP-EP-16 footprint matches your PCB layout requirements, paying attention to the exposed pad thermal connection for adequate heat dissipation during high-load operations.

Selection Notes

Select this component when designing circuits that require high input voltage tolerance without external boost supplies. The fixed 200 kHz frequency offers a balance between component size and efficiency. Consider the 400 mA output limit against your load requirements. The shutdown feature is critical for applications demanding minimal standby power consumption. Evaluate thermal performance based on the TSSOP-EP-16 package capabilities under expected ambient conditions.

Part Context

This part belongs to the LT3437 family of high-voltage buck regulators designed for space-constrained applications. It shares architectural similarities with other Analog Devices high-voltage converters but distinguishes itself through its specific 200 kHz frequency and 400 mA current rating. The family targets industrial and automotive markets where reliability and wide input voltage ranges are paramount.

Replacement Considerations

LT3437EDD#PBF serves as a direct functional alternative with identical electrical specifications but utilizes a DFN-10 package instead of TSSOP-EP-16. Verify thermal management requirements and PCB footprint compatibility before substitution. Other LT3437 variants may differ in package type or thermal performance characteristics.