LT1271CT#PBF

Overview

The LT1271CT#PBF is a monolithic high-efficiency switching regulator manufactured by Analog Devices Inc. It integrates a high-current, high-efficiency power switch with complete oscillator, control, and protection circuitry on a single die. The device supports multiple standard switching topologies including buck, boost, flyback, forward, inverting, and Cuk configurations. It operates with an input voltage range of 3V to 60V and delivers up to 4A of output current. The component utilizes a TO-220-5 package with tab for thermal management.

Feature Summary

• Integrates high-current power switch with full control and protection logic
• Supports versatile switching topologies including buck, boost, and flyback
• Operates across wide input voltage ranges up to 60V

Applications

• Buck converter circuits
• Boost converter circuits
• Flyback power supplies
• Forward converter designs

Procurement Notes

Verify the specific suffix CT#PBF against official Analog Devices documentation to confirm pinout and thermal pad configuration. Confirm RoHS compliance status through the manufacturer's current datasheet revision. Check for obsolescence notices as legacy switching regulators may have limited production runs.

Selection Notes

Select this component for applications requiring integrated high-current switching without external driver complexity. Ensure the design accommodates the 60V maximum input rating. Verify that the TO-220-5 package provides adequate thermal dissipation for the intended load current and ambient conditions.

Part Context

This part belongs to the LT1271 series of high-efficiency switching regulators from Linear Technology, now part of Analog Devices. It is designed for general-purpose DC-DC conversion where space savings and reduced component count are priorities due to the integration of the power switch and control loop.

Replacement Considerations

LT1271CN#PBF: Pin-compatible alternative in PDIP-8 package.