LTC3728LIUH#TRPBF

DC DC Switching Controllers Overview

The LTC3728LIUH#TRPBF is a dual high-performance step-down switching regulator controller designed to drive all N-channel synchronous power MOSFET stages. It features a constant frequency current mode architecture with an external frequency synchronization capability, allowing phase-lockable frequencies up to 550kHz. The device supports an input voltage range of 7V to 28V and provides two independent output channels. Typical configurations include 5V at 4A and 3.3V at 5A. It operates within an ambient temperature range of 0°C to 85°C and is housed in a 32-lead QFN package.

DC DC Switching Controllers Feature Summary

• Dual channel architecture for independent synchronous buck regulation
• External frequency synchronization for system-wide clock alignment
• Constant frequency current mode control for stable operation
• Integrated driver for N-channel synchronous power MOSFETs

DC DC Switching Controllers Applications

• Industrial equipment requiring synchronized multi-rail power distribution
• Telecommunications infrastructure power systems
• Automotive electronics utilizing the L-grade component specification
• High-density server and networking board power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the LIUH designation corresponds to the automotive grade and 0°C to 85°C operating temperature range required for your application environment. Ensure compatibility with the 32-pin QFN footprint during PCB layout preparation.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated or non-isolated outputs are required from a single controller IC. The external sync feature is critical for applications where switching noise must be aligned with other system clocks to prevent interference. Verify that the 7V minimum input voltage aligns with your source supply characteristics under all load conditions.

DC DC Switching Controllers Part Context

This part belongs to the LTC3728L family of dual synchronous step-down controllers. It shares architectural similarities with the LTC3728EUH but differs in operating temperature range and automotive qualification status. The LIUH variant is specifically optimized for environments requiring higher reliability standards compared to standard commercial grade counterparts.

DC DC Switching Controllers Replacement Considerations

The LTC3728LCUH serves as a functional alternative with similar electrical characteristics but may differ in package availability or specific automotive certification requirements. Cross-reference pinouts and thermal pad connections before substitution.