LT8705AIUHF#TRPBF

Overview

The LT8705AIUHF#TRPBF is a high-performance synchronous four-switch buck-boost DC/DC controller from Analog Devices Inc. It operates with input voltages ranging from 2.8V to 80V and supports output voltages from 1.3V to 80V. The device features integrated feedback loops for input current, input voltage, output current, and output voltage regulation. It utilizes a 38-QFN (5x7) package and supports switching frequencies between 100kHz and 400kHz. Key control features include clock synchronization, soft start, and enable functionality.

Feature Summary

• Synchronous four-switch topology enabling efficient buck, boost, and buck-boost operation across varying input and output voltage conditions.
• Integrated multi-loop feedback system providing precise regulation of input current, input voltage, output current, and output voltage.
• Supports external clock synchronization for noise immunity and phase alignment in multi-phase or parallel systems.

Applications

• Supercapacitor backup power supplies
• Telecom voltage stabilizers
• Industrial systems requiring wide input voltage ranges

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm that the AI suffix denotes the industrial temperature grade (-40°C to +125°C). Ensure compatibility with the required switching frequency range and check for any recent product change notices regarding epoxy or bond wire materials before finalizing procurement.

Selection Notes

Select this component for applications requiring a single controller to manage both step-up and step-down conversion seamlessly. It is suitable where input voltage may fluctuate above, below, or equal to the output voltage. Consider the 38-QFN package for space-constrained designs and verify thermal requirements for the bare pad configuration.

Part Context

The LT8705A series represents Analog Devices' advanced buck-boost controller family designed for robust power management. The LT8705AIUHF#TRPBF specifically refers to the industrial grade variant in a QFN package supplied in tape and reel format. It complements other variants like the EFE (TSSOP) by offering different thermal and mechanical form factors while maintaining identical electrical performance characteristics.

Replacement Considerations

LT8705IUHF#PBF

FAQ

What is the operating input voltage range for the LT8705AIUHF?

The device operates from an input voltage range of 2.8V to 80V.

Does the LT8705AIUHF support clock synchronization?

Yes, the controller includes a clock sync pin to allow synchronization with an external clock source.