LTC7811IUJ#TRPBF

DC DC Switching Controllers Overview

The LTC7811IUJ#TRPBF is a low quiescent current triple output buck-boost switching controller manufactured by Analog Devices Inc. It operates with an input voltage range of 1V to 40V and supports a programmable switching frequency from 100kHz to 3MHz. The device features three positive outputs, synchronous rectification, and a maximum duty cycle of 100%. It is housed in a 40-pin QFN (6x6mm) package with exposed pad, rated for automotive applications under AEC-Q100 standards, and functions within a junction temperature range of -40°C to 125°C.

DC DC Switching Controllers Feature Summary

• Supports boost, buck, and buck-boost topologies with three independent positive outputs
• Includes integrated synchronous rectification drivers for high efficiency
• Features comprehensive control characteristics including current limit, enable, frequency control, power good indication, and soft start

DC DC Switching Controllers Applications

• Automotive power distribution systems requiring multiple regulated rails
• Industrial equipment with wide input voltage variations
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm the IJ grade corresponds to the required industrial temperature range and automotive qualification status. Ensure the 40-WFQFN package dimensions match the target PCB footprint. Cross-reference the manufacturer part number directly with official Analog Devices documentation to avoid counterfeit components.

DC DC Switching Controllers Selection Notes

Select this component when designing systems requiring simultaneous regulation of three outputs from a variable input source. It is suitable for applications where input voltage may exceed or fall below output requirements. Consider the 1V minimum input constraint and the 40V maximum limit during system architecture planning. Evaluate thermal performance based on the 6x6mm QFN package constraints.

DC DC Switching Controllers Part Context

This part belongs to the LTC7811 family of low IQ triple output controllers. It shares architectural similarities with other devices in the series but is distinct in its specific buck-boost capability and pinout configuration. The IUJ designation specifies the industrial temperature grade and QFN package type, differentiating it from other variants in the product line.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative controllers from the same manufacturer.