LTC7851IUHH#PBF

DC DC Switching Controllers Overview

The LTC7851IUHH#PBF is a quad output multiphase synchronous step-down switching regulator controller from Analog Devices. It employs a constant frequency voltage mode architecture to manage multiple power rails efficiently. The device supports an input voltage range of 7V to 14V and operates with a switching frequency between 250kHz and 3MHz. It features four PWM signal outputs for driving external MOSFETs or DrMOS devices. The controller includes integrated soft-start, tracking capabilities, and power good indicators. It is housed in a 58-lead QFN package rated for junction temperatures up to 125°C.

DC DC Switching Controllers Feature Summary

• Quad output configuration for independent multi-rail power management
• Constant frequency voltage mode control architecture
• Integrated soft-start and tracking functionality
• Supports high current applications via discrete gate drivers or DrMOS

DC DC Switching Controllers Applications

• High-performance computing platforms requiring multiple voltage rails
• Graphics processing unit (GPU) power delivery systems
• Industrial equipment with complex power distribution needs
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when ordering. Confirm the 58-QFN package dimensions match your PCB footprint requirements. Ensure the design supports the required switching frequency range for optimal efficiency. Check availability status as supply may be limited for demonstration or specific revision boards.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring four independent buck converters driven by a single IC. It is suitable for applications needing precise voltage regulation across multiple loads. Consider the external component count for gate drivers and inductors when estimating board space. Verify that the input voltage range aligns with the system's power source specifications.

DC DC Switching Controllers Part Context

This component belongs to the LTC7851 family of multiphase controllers designed for high-current DC/DC conversion. It complements other Analog Devices power management solutions by providing flexible multi-output control. The device is often used in conjunction with discrete power stages or integrated power modules to achieve high efficiency and thermal performance in compact form factors.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC7851IUHH-1 for similar quad-output functionality with potential pin compatibility variations. Evaluate the LTC7851EUHH for demo board integration purposes. Ensure any replacement maintains the 58-pin QFN package and voltage mode control characteristics.