LT1737IS#TRPBF

Overview

The LT1737IS#TRPBF is a monolithic switching regulator controller designed for high-power isolated flyback topologies. It operates with an input supply voltage range of 4.5V to 20V and supports a maximum switching frequency of 250kHz. The device features current mode control and is rated for operation across a temperature range of -40°C to 125°C. It drives the gate of an external MOSFET and provides feedback via a third transformer winding, enabling efficient power conversion in applications requiring up to 25W output power.

Feature Summary

• Monolithic design specifically optimized for isolated flyback converter architectures
• Current mode control architecture for stable regulation and fast transient response
• Integrated gate driver capable of powering external MOSFETs directly
• Supports feedback signal acquisition through auxiliary transformer windings

Applications

• High-power isolated DC-DC converters
• Flyback power supplies for industrial equipment
• Isolated power stages in telecommunications infrastructure
• Auxiliary power supplies for server platforms

Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to ensure correct packaging and lead time specifications. Confirm that the IS variant meets the required operating temperature range for your specific application environment. Cross-reference the datasheet revision date to ensure compatibility with current design standards. Check for any recent obsolescence notices or lifecycle status updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when designing isolated flyback converters requiring current mode control and integrated MOSFET drive capabilities. Ensure the external MOSFET selection aligns with the controller's drive strength and the target switching frequency limits. Verify that the transformer design supports the necessary feedback winding configuration for accurate regulation. Consider thermal management requirements given the wide operating temperature range and potential power dissipation levels in high-output applications.

Part Context

The LT1737 series belongs to Analog Devices' portfolio of switching controllers tailored for isolated power conversion. This specific model targets high-power applications where efficiency and reliability are critical. The IS package variant offers industrial-grade performance suitable for demanding environments. It complements other flyback controllers by providing a specialized solution for designs requiring robust isolation and precise current-mode regulation without external compensation complexity.

Replacement Considerations

LT1737CS#TRPBF