LT1976HFE#PBF

Overview

The LT1976HFE#PBF is a monolithic step-down switching regulator from Analog Devices Inc., designed for high-voltage applications with an input range of 3.3V to 60V. It delivers a continuous output current of 1.5A at a fixed switching frequency of 200kHz. The device features a low on-resistance internal switch and supports adjustable output voltages starting from 1.25V. Housed in a 16-lead TSSOP package with an exposed pad, it operates reliably across a junction temperature range of -40°C to 150°C.

Feature Summary

• Integrates a high-efficiency 1.5A power switch with low on-resistance for improved thermal performance
• Supports wide input voltage ranges up to 60V suitable for industrial and automotive systems
• Includes programmable soft-start to limit inrush current during startup
• Offers cycle-by-cycle current limiting and thermal shutdown for robust protection

Applications

• Industrial point-of-load regulation
• Automotive electronics power distribution
• General-purpose DC-DC conversion for high-voltage inputs
• Battery-powered equipment requiring efficient step-down topology

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and thermal characteristics. Ensure the procurement channel provides genuine components with traceable manufacturing data. Cross-reference the package type and operating temperature range with system requirements before finalizing orders.

Selection Notes

Select this component when a stable 1.5A output is required from input voltages exceeding standard 5V or 12V rails. The fixed 200kHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the exposed pad requirement for adequate heat dissipation in high-power density designs.

Part Context

This part belongs to the LT1976 family of high-voltage buck regulators. It shares functional similarities with other Linear Technology-derived parts but is distinct in its specific voltage handling and current capabilities. The family is known for integrating protection features typically found in discrete solutions into a single compact IC.

Replacement Considerations

LT1976IFE#TRPBF: Compatible alternative with identical electrical specifications but supplied in tape-and-reel packaging instead of tube.