LTC3853IUJ#TRPBF

DC DC Switching Controllers Overview

The LTC3853IUJ#TRPBF is a triple-output synchronous step-down controller from Analog Devices Inc., housed in a 40-WFQFN (6x6 mm) package. It operates with an input voltage range of 4.5V to 24V and supports switching frequencies between 250kHz and 750kHz. The device features three independent outputs with a maximum duty cycle of 98%. It includes integrated current limit, enable, frequency control, power good, soft start, and tracking capabilities. The operating junction temperature range is -40°C to 150°C.

DC DC Switching Controllers Feature Summary

• Integrates on-chip drivers for a compact 6mm x 6mm QFN footprint
• Supports combining channels 1 and 2 for up to 30A single output applications
• Features high common mode range on channel 3 for 12V generation

DC DC Switching Controllers Applications

• Applications requiring combined high current delivery up to 30A
• Systems utilizing 180-degree phase shifting to minimize output ripple
• Circuits needing a dedicated 12V rail via high common mode range channel

DC DC Switching Controllers Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing. Confirm the IJ suffix corresponds to the industrial temperature grade (-40°C to 150°C TJ). Ensure compatibility with the 40-QFN (6x6) footprint during PCB layout. Cross-reference the manufacturer datasheet for exact pinout definitions and thermal pad requirements before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring three synchronized buck outputs within a small form factor. Consider the 250kHz to 750kHz frequency range for balancing efficiency and passive component size. Evaluate the need for channel paralleling if loads exceed standard per-channel limits. Verify that the 4.5V to 24V input range aligns with the system power supply architecture.

DC DC Switching Controllers Part Context

This part belongs to the LTC3853 family of versatile multiphase synchronous step-down controllers. It is designed for applications demanding high efficiency and tight regulation across multiple rails. The series emphasizes compact integration by including driver circuitry directly on the chip, reducing external component count compared to discrete solutions.

DC DC Switching Controllers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.