LTC3870EUFD#PBF

DC DC Switching Controllers Overview

The LTC3870EUFD#PBF is a multiphase step-down slave controller designed for PolyPhase operation with digital power system management DC/DC controllers. It supports an input voltage range of 4.5V to 60V and delivers up to 20A output current across two outputs. The device operates at switching frequencies between 100kHz and 1MHz, with an output voltage range of 500mV to 14V. It features a load regulation of 0.8% and a quiescent current of 1.1mA. The component functions within a temperature range of -40°C to +125°C and is housed in a QFN-24 package.

DC DC Switching Controllers Feature Summary

• Designed specifically for multiphase operation with digital power system management DC/DC controllers
• Provides a small and cost-effective solution for supplying very large currents when cascaded with master controllers
• Supports synchronous buck topology with independent control of two output stages

DC DC Switching Controllers Applications

• Digital power system management applications requiring high current delivery
• Multiphase polyphase buck converter designs
• Systems utilizing cascaded controller architectures for large current loads

DC DC Switching Controllers Procurement Notes

Verify the specific suffix EUFD against the manufacturer's official documentation to confirm pinout and thermal pad configuration. Ensure compatibility with the intended master controller, such as the LTC3887-1, for proper PolyPhase synchronization. Confirm that the QFN-24 package footprint matches the PCB layout requirements. Check for any recent product change notices regarding material or manufacturing site updates.

DC DC Switching Controllers Selection Notes

Select this component when interfacing with digital power controllers to expand phase count without additional master complexity. It is suitable for applications demanding high efficiency and precise current sharing among multiple phases. Consider the 4.5V to 60V input range and the need for external MOSFET drivers compatible with the controller's output stage. Evaluate thermal performance requirements given the 20A capability and QFN-24 package constraints.

DC DC Switching Controllers Part Context

This part belongs to the LTC3870 series of multiphase step-down slave controllers from Analog Devices. It is engineered to work in conjunction with master controllers to create high-current, multi-phase power solutions. The series focuses on simplifying the design of complex power systems by offloading phase control tasks to dedicated slave units, thereby reducing board space and component count.

DC DC Switching Controllers Replacement Considerations

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