LTC3728LEUH-1#TRPBF

DC DC Switching Controllers Overview

The LTC3728LEUH-1#TRPBF is a dual high-performance step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4.5 V to 28 V and supports output voltages of 3.3 V and 5 V. The device delivers up to 25 A output current across two channels with a fixed switching frequency of 550 kHz. It features a constant frequency current mode architecture, low static current of 20 uA, and operates between -40°C and +85°C. Packaged in a 32-pin QFN (5x5 mm) with exposed pad, it drives all N-channel synchronous power MOSFET stages.

DC DC Switching Controllers Feature Summary

• Dual channel synchronous buck controller architecture driving N-channel MOSFETs
• Constant frequency current mode control for stable regulation
• Integrated soft start, enable, and power good monitoring functions

DC DC Switching Controllers Applications

• High efficiency dual rail power supplies for industrial equipment
• Point-of-load conversion in telecommunications infrastructure
• Power distribution systems requiring synchronized multi-phase outputs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the LEUH-1 designation matches the required thermal and electrical specifications for your application. Ensure compatibility with external component selection for the 550 kHz operation. Check manufacturer documentation for any recent product change notices affecting pinout or performance parameters.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring independent dual output regulation from a single wide input voltage source. The 550 kHz frequency allows for compact passive component sizing compared to lower frequency alternatives. Consider the 25 A total current capability and the need for external N-channel MOSFETs suitable for the target load conditions. Evaluate thermal management requirements given the QFN package and high current density.

DC DC Switching Controllers Part Context

This component belongs to the LTC3728L family of dual synchronous buck controllers. It shares architectural similarities with other members like the LTC3728EUH but differs in specific electrical ratings and packaging options. The L-series typically denotes specific temperature ranges or automotive-grade variants depending on the full part number configuration.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other parts within the LTC3728L family such as the LTC3728LEGN-1#PBF for tube packaging or the LTC3728LIUH-1#PBF for automotive grade versions. Verify that alternative packages maintain the same pinout and thermal characteristics.