LTC3728LEUH#TRPBF

DC DC Switching Controllers Overview

The LTC3728LEUH#TRPBF is a dual high-performance synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 30V and supports output voltages from 600mV to 5V. The device delivers up to 40A of output current with a single output configuration, utilizing a Buck topology at a fixed switching frequency of 550kHz. It features a load regulation of 0.1% and a quiescent current of 470uA. Designed for surface mount installation, it is housed in a QFN-32 package and functions reliably across an operating temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture capable of driving all N-channel synchronous power MOSFET stages for efficient power conversion.
• Constant frequency current mode control architecture allows for phase-lockable operation up to 550kHz.
• Integrated control features include shutdown capability, power good indication, and soft-start functionality.

DC DC Switching Controllers Applications

• High-efficiency dual-output DC/DC converters
• Industrial point-of-load (POL) power supplies
• Embedded systems requiring synchronized multi-phase buck regulation

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the lead time and availability status align with current distributor listings, as stock levels fluctuate. Ensure the component meets RoHS compliance requirements for your target assembly process. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit parts. Check for any regional shipping restrictions or supply limitations before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual independent outputs driven by external N-channel MOSFETs. It is suitable for designs needing precise load regulation and low noise performance. Consider the 32-QFN package size for board space constraints. Evaluate the 550kHz switching frequency against EMI requirements and inductor selection. Ensure the input voltage range covers the system's operational extremes. Verify thermal management capabilities for the intended current loads.

DC DC Switching Controllers Part Context

This component belongs to the LTC3728L series of dual synchronous step-down controllers. It shares architectural similarities with other members like the LTC3728EUH and LTC3728LCUH but differs in package type and specific electrical characteristics. The series is designed for versatile power management solutions in industrial and embedded environments. It complements other PMIC offerings from Analog Devices focusing on high-efficiency DC/DC conversion.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC3728EUH#TRPBF and LTC3728LCUH#TRPBF. Verify pin compatibility and electrical parameter alignment before swapping. The LTC3728LEGN#PBF offers similar functionality in a different SSOP-28 package. Ensure replacement parts match the required input/output voltage ranges and current capabilities.

DC DC Switching Controllers FAQ

What is the maximum switching frequency supported by the LTC3728LEUH?

The device supports a constant frequency current mode architecture with a phase-lockable frequency of up to 550kHz.

Does the LTC3728LEUH support external frequency synchronization?

Yes, the controller allows for external frequency synchronization to ensure multiple converters operate in phase.

What type of MOSFETs does the LTC3728LEUH drive?

It is designed to drive all N-channel synchronous power MOSFET stages for both channels.