LT3575IFE#TRPBF

Overview

The LT3575IFE#TRPBF is a monolithic switching regulator IC designed for isolated flyback topologies, eliminating the need for third windings or optoisolators. It supports positive or negative output configurations and delivers up to 2.5A output current in a single-output arrangement. The device operates within an input voltage range of 3V to 40V and features a fixed 1MHz switching frequency. It is housed in a 16-lead TSSOP package with an exposed pad, ensuring efficient thermal performance across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrated flyback controller capable of supporting both positive and negative output polarities without external isolation components
• High-efficiency power switch rated for 2.5A continuous output current
• Fixed high-frequency operation at 1MHz to minimize passive component size
• Built-in thermal regulation and protection mechanisms for reliable operation

Applications

• Isolated DC-DC conversion for industrial control systems
• Power supplies for medical equipment requiring galvanic isolation
• Battery chargers with isolated output stages
• Telecommunications infrastructure power modules

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official Analog Devices documentation prior to integration. Ensure the supplier provides valid traceability data for the 16-TSSOP package variant. Cross-reference the manufacturer part number LT3575IFE#TRPBF against current availability lists to avoid obsolete stock issues during procurement planning.

Selection Notes

Select this component when designing isolated flyback converters requiring simplified feedback loops without optocouplers. The 1MHz switching frequency allows for smaller magnetics compared to lower-frequency alternatives. Consider the 2.5A output capability relative to load requirements and thermal dissipation constraints within the TSSOP-16 package. Evaluate input voltage ranges between 3V and 40V against system supply characteristics.

Part Context

This part belongs to the LT3575 family of monolithic switching regulators from Analog Devices. It is specifically engineered for applications demanding isolation without complex feedback networks. The device integrates the power switch and controller logic into a single compact solution, distinguishing it from discrete flyback designs that require separate driver and transformer winding management.

Replacement Considerations

LT3575IFE#PBF is the non-tray version of the same functional device.