LTC3728LXCUH#TRPBF

DC DC Switching Controllers Overview

The LTC3728LXCUH#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 590kHz. The device supports input voltages from 4.5V to 30V and provides two independent output channels. Key electrical parameters include a maximum duty cycle of 0.994 and a supply voltage range of 4.5V to 28V. It operates within a temperature range of -40°C to +125°C and is housed in a 32-pin QFN package.

DC DC Switching Controllers Feature Summary

• Dual channel control for independent synchronous buck regulation
• External frequency synchronization for system-wide clock alignment
• High efficiency operation with integrated soft start and power good indicators

DC DC Switching Controllers Applications

• Industrial distributed power systems requiring synchronized clocks
• Telecommunications infrastructure power supplies
• Automotive electronics power management modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'XCUH' against the manufacturer's official datasheet to confirm pinout compatibility and thermal pad specifications. Ensure the ordering part number matches the exact tape and reel packaging requirements for automated assembly processes. Cross-reference the RoHS compliance status with current environmental regulations before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated or non-isolated outputs require precise phase synchronization across multiple converters. The wide input voltage range accommodates various bus architectures. Consider the thermal performance of the exposed pad QFN package for high-current applications. Verify that the external clock source meets the required frequency stability and jitter specifications for optimal noise performance.

DC DC Switching Controllers Part Context

This part belongs to the LTC3728L family of dual synchronous buck controllers. It shares architectural similarities with other members like the LTC3728EUH but differs in package type and specific operating temperature ranges. The XCUH designation indicates a specific automotive-grade or extended temperature variant packaged in a compact QFN form factor suitable for space-constrained designs.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC3728LEGN-1#PBF for tube packaging or the LTC3728LCUH#TRPBF if reel packaging is acceptable. Verify functional equivalence regarding the maximum switching frequency and input voltage limits. Ensure that any replacement maintains the same pinout configuration to avoid PCB redesign.