LTC7851IUHH

DC DC Switching Controllers Overview

The LTC7851IUHH is a quad output multiphase synchronous step-down switching regulator controller employing a constant frequency voltage mode architecture. It supports an input voltage range of 7V to 14V and operates with a switching frequency up to 3MHz. The device features four independent PWM outputs for driving external MOSFETs or power blocks, enabling high-current configurations such as 140A at 1.2V or 95A at 1.2V combined with 30A at 1.8V. It includes integrated soft-start, tracking, and power good signals within a 58-pin PQFN package.

DC DC Switching Controllers Feature Summary

• Quad output multiphase synchronous step-down switching regulator controller
• Constant frequency voltage mode architecture for stable regulation
• Integrated control features including soft-start, tracking, and power good signals
• Supports discrete gate drivers, DrMOS, or power block implementations

DC DC Switching Controllers Applications

• High current multi-rail server and data center power distribution
• Telecommunications infrastructure power supplies
• Industrial equipment requiring multiple regulated voltage rails
• Point-of-load (POL) converter designs with discrete MOSFETs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and thermal pad configuration. Ensure the selected variant matches the required switching frequency and package type for the target PCB layout. Cross-reference the datasheet revision date to validate feature availability and electrical characteristics before finalizing procurement specifications.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring independent regulation of four distinct output voltages from a single input source. It is suitable for designs utilizing external power stages where flexibility in component selection is prioritized over integrated solutions. Consider the maximum operating temperature range and thermal management requirements associated with the 58-pin PQFN package when designing the heat dissipation path.

DC DC Switching Controllers Part Context

The LTC7851 belongs to Analog Devices' family of high-performance DC/DC controllers designed for demanding power management applications. It complements other products in the series by offering multi-phase capability and precise voltage mode control. The device is often evaluated using demonstration boards like the DC2380A series to assess performance in complex multi-output topologies.

DC DC Switching Controllers Replacement Considerations

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