LTC1439IGW#PBF

DC DC Switching Controllers Overview

The LTC1439IGW#PBF is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 3.5V to 36V and supports a maximum switching frequency of 400kHz. The device features two positive output phases in a 36-SSOP package. Key electrical parameters include a maximum duty cycle of 99%, an operating supply current of 320µA, and load regulation of 0.5%. It functions within a temperature range of -40°C to 85°C.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck architecture driving external N-channel power MOSFETs
• Phase-lockable fixed frequency operation for noise synchronization
• Integrated control features including enable, soft-start, and undervoltage lockout

DC DC Switching Controllers Applications

• High efficiency 3.3V/2.5V step-down regulators
• Low noise 12V linear regulator systems
• Automotive electronics requiring robust power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates RoHS compliance and lead-free status. Confirm the 36-SSOP package dimensions match your PCB footprint requirements. Ensure the design supports external MOSFET selection for the specified current loads. Check for any recent Product Change Notices affecting specifications or pinouts before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated low-noise outputs are required from a single controller. It is suitable for applications needing phase-lockable frequencies to minimize EMI interference. Consider the 36-pin SSOP package constraints for thermal management and board space. Verify that the external MOSFETs can handle the peak currents associated with the 400kHz switching rate.

DC DC Switching Controllers Part Context

This part belongs to the LTC1438/LTC1439 family of high-efficiency, low-noise synchronous step-down switching regulators. These controllers are designed to drive external N-channel power MOSFETs, offering flexibility in output configuration. The series is characterized by its ability to operate at high frequencies while maintaining low noise profiles suitable for sensitive analog circuits.

DC DC Switching Controllers Replacement Considerations

LTC1438 variants offer similar functionality but may differ in pin count or specific electrical characteristics. Verify compatibility regarding the number of outputs and package type before substitution.