LTC1439CG

DC DC Switching Controllers Overview

The LTC1439CG is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 5.2V to 28V and supports output voltages of 3.3V and 5V. The device delivers up to 3.5A of output current in a phase-lockable fixed frequency architecture, driving external N-channel power MOSFETs. It is housed in a 36-lead SSOP package with a maximum switching frequency of 400kHz.

DC DC Switching Controllers Feature Summary

• Dual channel synchronous buck topology for independent or synchronized regulation
• Phase-lockable fixed frequency operation for noise management
• Integrated control features including enable, power-on reset, and soft-start

DC DC Switching Controllers Applications

• High efficiency dual rail power supplies
• Notebook computer power distribution systems
• Industrial DC/DC conversion modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and temperature rating. Confirm RoHS compliance status and lead-free manufacturing details directly with the supplier. Ensure the component matches the required automotive or industrial qualification standards if applicable to the design.

DC DC Switching Controllers Selection Notes

Select this controller when designing a dual-output system requiring high efficiency and low noise. Ensure external MOSFETs are rated for the target current and voltage levels. Verify that the PCB layout supports the 36-SSOP footprint and thermal requirements for the intended operating environment.

DC DC Switching Controllers Part Context

This component belongs to the LTC1439 family of dual synchronous buck controllers from Analog Devices. It is designed to replace older single-channel solutions by providing two regulated outputs from a single IC, reducing board space and component count in compact power designs.

DC DC Switching Controllers Replacement Considerations

LTC1439CG#PBF serves as the direct lead-free replacement variant for the standard LTC1439CG part number.