LTC7851EUHH

DC DC Switching Controllers Overview

The LTC7851EUHH is a quad output multiphase synchronous step-down switching regulator controller from Analog Devices. It employs a constant frequency voltage mode architecture to manage four independent output channels. The device supports an input voltage range of 7V to 14V and operates with a switching frequency between 250kHz and 3MHz. It features a VCC/VDD supply range of 3V to 5.5V and a maximum duty cycle of 91.5%. Designed for surface mount installation, the component utilizes a 58-wire QFN package with an exposed pad, measuring 5mm by 9mm.

DC DC Switching Controllers Feature Summary

• Quad output configuration supporting independent multiphase control
• Constant frequency voltage mode architecture for stable regulation
• Integrated current limit, enable, and soft start functions
• Supports tracking and power good signal monitoring

DC DC Switching Controllers Applications

• High current multi-rail server power distribution
• Industrial equipment requiring multiple regulated voltage rails
• Telecommunications infrastructure power systems
• Automotive electronics power management modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix variant (e.g., EUHH vs EUHH-1) against the target schematic requirements. Confirm package dimensions and thermal pad specifications match the PCB footprint design. Ensure the selected component meets the required operating temperature range for the intended environment before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring four distinct output voltages from a single input source. Evaluate the need for external discrete gate drivers versus integrated DrMOS solutions based on efficiency targets. Consider the switching frequency range to optimize inductor size and transient response characteristics for the specific load requirements.

DC DC Switching Controllers Part Context

This component belongs to the LTC7851 family of high-performance DC/DC controllers. It is designed to replace older multi-controller solutions by integrating four channels into a single compact package. The device complements other Analog Devices power management ICs used in complex system architectures requiring precise voltage regulation and synchronization capabilities.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.