LTC1439EG#PBF

DC DC Switching Controllers Overview

The LTC1439EG#PBF is a dual synchronous step-down switching regulator controller from Analog Devices Inc., housed in a 36-pin SSOP package. It operates with an input voltage range of 3.5V to 36V and supports a switching frequency up to 400kHz. The device features a phase-lockable fixed frequency architecture and drives external N-channel power MOSFETs. Key electrical parameters include a maximum duty cycle of 99% and a supply voltage range of 3.5V to 30V. It includes control features such as enable, power-on reset, and soft start, operating within a temperature range of -40°C to 85°C.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck controller architecture for driving external N-channel power MOSFETs
• Phase-lockable fixed frequency operation supporting synchronization up to 400kHz
• Integrated control features including enable, power-on reset, and soft start functionality

DC DC Switching Controllers Applications

• High efficiency dual output DC-DC conversion systems
• Low noise power supply designs requiring synchronized switching
• Automotive electronics utilizing the automotive-grade variant specifications

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against the manufacturer's current datasheet to confirm pinout compatibility and thermal characteristics. Ensure the selected package variant matches the PCB footprint requirements. Confirm that the external component selection aligns with the specified input voltage and switching frequency ranges for stable operation.

DC DC Switching Controllers Selection Notes

Select this controller when designing dual-output synchronous buck converters requiring high efficiency and low noise. It is suitable for applications needing phase-lockable fixed frequency operation to minimize electromagnetic interference. Consider the external MOSFET drive capability and the wide input voltage range for versatile power management solutions.

DC DC Switching Controllers Part Context

The LTC1439 belongs to the LTC1438/LTC1439 family of dual synchronous step-down switching regulators. These controllers are designed to provide high efficiency and low noise performance by driving external power stages. The EG#PBF designation indicates the specific package and lead-free compliance status within this product line.

DC DC Switching Controllers Replacement Considerations

The LTC1438 is a related single-channel or dual-channel variant within the same family. Verify functional equivalence regarding output configuration and control features before substitution. Consult the official datasheet for detailed comparison of electrical specifications and pin assignments.