LTC3728IUH#PBF

DC DC Switching Controllers Overview

The LTC3728IUH#PBF is a dual high-performance 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 switching frequencies between 260kHz and 550kHz. The device features two independent output channels, each capable of driving N-channel power MOSFETs for efficient DC-DC conversion. Key electrical parameters include a maximum duty cycle of 0.994 and operation across a temperature range of -40°C to +85°C. The component is housed in a 32-WFQFN (5x5mm) package with an exposed thermal pad, designed for surface mount installation.

DC DC Switching Controllers Feature Summary

• Dual channel architecture providing independent control for two separate synchronous buck converters
• Supports phase-lockable constant frequency current mode operation up to 550kHz
• Integrated soft start, enable, and power good functions for system management
• Capable of driving all N-channel synchronous power MOSFET stages

DC DC Switching Controllers Applications

• Distributed power supply architectures requiring multiple regulated rails
• Industrial equipment power management systems
• Telecommunications infrastructure power distribution
• Embedded computing platforms needing efficient voltage regulation

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the QFN-32 package dimensions match your PCB footprint requirements. Ensure the operating temperature range aligns with your environmental specifications. Check for any recent product lifecycle notifications regarding availability or obsolescence status from Analog Devices.

DC DC Switching Controllers Selection Notes

Select this controller when dual isolated or non-isolated outputs are required from a single IC solution. Consider the 550kHz maximum frequency for optimizing external component size versus efficiency trade-offs. Evaluate the 3.5V minimum input voltage against your lowest source rail conditions. Verify that the 32-pin QFN package is suitable for your assembly capabilities and thermal dissipation needs.

DC DC Switching Controllers Part Context

This component belongs to the LTC3728 family of dual synchronous buck controllers. It shares architectural similarities with the LTC1628 but offers higher frequency operation and improved performance characteristics. The part is categorized under PMIC DC/DC Switching Controllers within Analog Devices' portfolio, targeting applications requiring compact, high-efficiency power solutions.

DC DC Switching Controllers Replacement Considerations

The LTC3728EUF#PBF serves as a pin-compatible alternative within the same series. Designers may also consider the LTC3728L variants for different input voltage ranges. Always verify electrical parameter compatibility before substituting components.