LTC1439IG#PBF

DC DC Switching Controllers Overview

The LTC1439IG#PBF is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.5V to 30V and supports a maximum switching frequency of 400kHz. The device features a phase-lockable fixed-frequency architecture and drives external N-channel power MOSFETs for two independent outputs. Key electrical parameters include a maximum duty cycle of 99% and a supply voltage range of 3.5V to 30V. It is housed in a 36-SSOP package and functions as a positive output buck converter with integrated control features.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck topology driving external N-channel MOSFETs
• Phase-lockable fixed-frequency architecture for synchronization
• Integrated enable, power-on reset, and soft-start controls

DC DC Switching Controllers Applications

• Notebook computer power supplies
• High-efficiency multi-output DC/DC conversion systems
• Low-noise regulated power distribution networks

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout and functional compatibility. Ensure the component meets RoHS3 compliance requirements for your assembly process. Confirm the 36-SSOP package dimensions match your PCB footprint design. Check for any recent Product Change Notices affecting specifications or materials. Validate that the operating temperature range suits your environmental conditions.

DC DC Switching Controllers Selection Notes

Select this controller when designing dual-rail synchronous buck converters requiring high efficiency and low noise. It is suitable for applications needing phase-lockable operation to minimize EMI through frequency spreading or synchronization. Consider its 30V maximum input rating for standard bus voltage architectures. Evaluate the need for external MOSFETs versus integrated solutions based on current requirements.

DC DC Switching Controllers Part Context

This component belongs to the LTC1439 family of dual synchronous step-down switching regulators. It shares architectural similarities with the LTC1438 but offers distinct packaging and feature sets tailored for specific board space and performance constraints. The series is designed for high-efficiency power management in portable and industrial electronics.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitutes include the LTC1438XCG#PBF and LTC1435AIG#TRPBF. Verify pin compatibility and thermal performance before substitution. Review datasheets for differences in switching frequency ranges and control interfaces.