LT1976BEFE#PBF

Overview

The LT1976BEFE#PBF is a high-voltage synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.3V to 60V and provides an adjustable output voltage from 1.25V to 55.2V. The device delivers a continuous switch current of 1.5A and supports a switching frequency of 200kHz. It is housed in a 16-lead TSSOP package with an exposed pad for thermal management, suitable for surface-mount applications across a temperature range of -40°C to 125°C.

Feature Summary

• Integrates high-side and low-side N-channel power switches for efficient synchronous rectification without requiring external Schottky diodes.
• Features a fixed 200kHz switching frequency that allows the use of small external inductors and capacitors to minimize solution size.
• Includes programmable soft-start to limit inrush current during startup and protect against output short circuits.

Applications

• Industrial point-of-load regulation
• Battery-powered equipment with wide input ranges
• Distributed power systems

Procurement Notes

Verify the specific suffix 'EFE' against the official datasheet to confirm pinout and thermal pad configuration matches your PCB footprint. Ensure the component is lead-free (PBF) if RoHS compliance is required. Cross-reference the manufacturer part number directly with Analog Devices documentation to avoid confusion with similar LT1976 variants.

Selection Notes

Select this component when a compact, non-isolated buck converter is needed for inputs up to 60V. It is appropriate for designs requiring moderate output currents around 1.5A where efficiency and board space are critical constraints. Consider the thermal performance of the TSSOP package relative to the expected load current and ambient conditions.

Part Context

This part belongs to the LT1976 family of high-voltage synchronous buck regulators. It shares core architecture with other variants like the LT1976IFE but may differ in packaging or specific electrical tolerances. The family is designed for applications requiring robust performance over wide input voltage ranges.

Replacement Considerations

LT1976IFE#PBF is a documented alternative within the same product family. Verify package compatibility and thermal characteristics before substitution.

FAQ

Does the LT1976BEFE#PBF require external Schottky diodes?

No, it integrates synchronous rectification using internal N-channel MOSFETs, eliminating the need for external diodes.

What is the maximum input voltage supported?

The device supports a maximum input voltage of 60V.