LTC3728LZEUH#PBF

DC DC Switching Controllers Overview

The LTC3728LZEUH#PBF is a dual high-performance step-down switching regulator controller manufactured by Analog Devices Inc. It features a constant frequency current mode architecture capable of driving all N-channel synchronous power MOSFET stages. The device supports an input voltage range of 4.5V to 28V and operates at switch frequencies between 260kHz and 550kHz. It provides two positive outputs with a maximum duty cycle of 0.994. The controller includes integrated soft start, enable, and power good functions. It is housed in a 32-WFQFN exposed pad package (5x5) and operates within a temperature range of 0°C to 85°C.

DC DC Switching Controllers Feature Summary

• Dual channel control for independent or interleaved buck converter topologies
• Constant frequency current mode architecture for stable loop performance
• Integrated soft start, enable, and power good signal generation
• Supports phase-lockable operation up to 550kHz

DC DC Switching Controllers Applications

• High efficiency dual output DC/DC converters
• Industrial point-of-load regulation systems
• Telecommunications power distribution networks
• Embedded computing board power management

DC DC Switching Controllers Procurement Notes

Verify the suffix ZEUH against official Analog Devices documentation to confirm specific tape-and-reel packaging and automotive qualification status if required. Ensure the component matches the 32-QFN footprint dimensions specified in the datasheet. Cross-reference the manufacturer part number directly with the official product page to avoid confusion with similar L, X, or EUH variants that may differ in temperature grade or package type.

DC DC Switching Controllers Selection Notes

Select this controller when designing dual-output synchronous buck converters requiring precise current mode control. It is suitable for applications needing wide input voltage ranges up to 28V. Consider the thermal performance of the exposed pad QFN package for high-current designs. Verify that external MOSFETs can handle the switching speeds supported by the 550kHz maximum frequency.

DC DC Switching Controllers Part Context

This component belongs to the LTC3728 family of dual synchronous buck controllers from Analog Devices. The family is designed for high-efficiency power conversion in space-constrained environments. Variants within the series typically share the same core architecture but differ in package options, temperature ratings, and specific feature sets like clock synchronization capabilities.

DC DC Switching Controllers Replacement Considerations

LTC3728LCUH#PBF

DC DC Switching Controllers FAQ

Does the LTC3728LZEUH support external clock synchronization?

Yes, the LTC3728L family supports external frequency synchronization to allow phase locking with other converters.

What is the maximum duty cycle of the controller?

The controller supports a maximum duty cycle of 0.994, allowing for minimal dropout voltage.