LT8709IFE#TRPBF

Overview

The LT8709IFE#TRPBF is a synchronous PWM controller designed for negative-to-negative or negative-to-positive DC/DC conversion. It supports Boost, Buck, Inverting, and SEPIC topologies with one output. The device operates at a switching frequency of 750 kHz and delivers an output current of 25 A. The output voltage range spans from 1.234 V to 80 V. It functions within a temperature range of -40°C to +125°C. The component is housed in a TSSOP-20 package and requires a supply voltage between -4.5V and -80V.

Feature Summary

• Synchronous PWM control architecture for multi-topology DC/DC conversion
• Rail-to-rail output current monitoring capability
• Supports negative-to-negative and negative-to-positive conversion configurations

Applications

• Negative rail generation systems
• Industrial power supplies requiring inverted topologies
• Telecommunications equipment with negative input requirements

Procurement Notes

Verify availability status as distribution channels may indicate limited supply or discontinuation. Confirm the specific suffix TRPBF corresponds to tape and reel packaging when ordering. Ensure the development kit DC2148A is available for evaluation if required. Check RoHS compliance documentation for regulatory adherence. Validate that the TSSOP-20 package matches the PCB footprint design constraints.

Selection Notes

Select this controller for applications requiring negative input voltages up to -80V. The 25 A output current rating suits high-power density designs. The 750 kHz switching frequency allows for compact passive component selection. Ensure the system topology aligns with the supported Buck, Boost, Inverting, or SEPIC modes. Verify thermal management requirements for the TSSOP-20 package under maximum load conditions.

Part Context

The LT8709 belongs to the Analog Devices LT8709 series of power management ICs. It is categorized as a switching controller within the PMIC family. The part is manufactured by Analog Devices Inc. and is distinct from positive-input controllers like the LT8705. It serves specialized roles in power systems requiring negative voltage handling.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.