LT3437HFE#PBF

Overview

The LT3437HFE#PBF 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 delivers an adjustable output current up to 400 mA. The device features a fixed switching frequency of 200 kHz and a low quiescent current of 100 µA. It is housed in a TSSOP-EP-16 package designed for surface mount installation. The component supports a shutdown function and functions within a temperature range of -40°C to +140°C, classifying it as a single-output buck converter suitable for power management applications.

Feature Summary

• Integrates a high-voltage buck topology capable of handling input voltages up to 60 V
• Provides low standby power consumption through a 100 µA quiescent current specification
• Includes a dedicated shutdown pin for system power management control
• Utilizes a thermally enhanced TSSOP-EP-16 package for efficient heat dissipation

Applications

• Industrial equipment power distribution systems
• Automotive electronics requiring wide input voltage tolerance
• Battery-powered devices needing efficient step-down regulation
• General-purpose DC-DC conversion in compact form factors

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging rather than reel packaging when reviewing distributor listings. Confirm that the H-grade designation aligns with the required extended operating temperature range of up to 140°C for your application environment. Cross-reference the manufacturer part number with official Analog Devices documentation to ensure compatibility with your design specifications before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require a robust buck converter with a wide input voltage range extending to 60 V. The 400 mA output current capability suits moderate load applications where space constraints favor the TSSOP-EP-16 package. Consider the 200 kHz switching frequency for balancing electromagnetic interference and external component size requirements against transient response needs.

Part Context

This part belongs to the LT3437 series of high-voltage switching regulators from Analog Devices. It shares architectural similarities with other members like the LT3435 but differs in output current ratings and specific thermal characteristics. The series is designed for applications demanding reliable performance under varying input conditions while maintaining low power consumption during idle states.

Replacement Considerations

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