ADP1870ACPZ-1.0-R7

Overview

The ADP1870ACPZ-1.0-R7 is a synchronous buck DC-DC controller manufactured by Analog Devices Inc. It operates with a fixed switching frequency of 1 MHz and provides a fixed output voltage of 1.0 V. The device supports input voltages ranging from 3.25 V to 20 V and delivers an output current capability of up to 25 A. Packaged in a 10-lead LFCSP-WD (3x3) format, it features light load efficiency enhancement for improved performance under low load conditions.

Feature Summary

• Synchronous buck topology for high-efficiency step-down conversion
• Fixed 1 MHz switching frequency enables compact passive component sizing
• Light load efficiency enhancement circuitry improves partial load performance
• Integrated error amplifier and compensation network simplify design

Applications

• Point-of-load regulation for digital signal processors
• Power supply stages for field-programmable gate arrays
• Voltage regulation for memory subsystems
• Power distribution networks for communication equipment

Procurement Notes

Verify the specific suffix -R7 indicates tape and reel packaging when reviewing distributor listings. Confirm the 1.0 V fixed output variant matches system requirements, as other voltage options exist within the ADP1870 family. Ensure compatibility with the 10-lead LFCSP-WD footprint during PCB layout verification. Check manufacturer documentation for moisture sensitivity classification and reflow soldering profile recommendations prior to assembly.

Selection Notes

Select this component when a fixed 1.0 V output is required without external resistor programming. The 1 MHz frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Consider the 25 A current capability relative to thermal management constraints in the target application. Verify that the 3.25 V minimum input voltage aligns with the available power rail headroom.

Part Context

This part belongs to the ADP1870 series of synchronous buck controllers designed for high-current applications. It complements other variants in the family that offer different fixed output voltages or adjustable output ranges. The LFCSP-WD package provides a compact solution suitable for space-constrained designs requiring efficient power conversion.

Replacement Considerations

Direct substitutes include other ADP1870 variants with different fixed output voltages if the voltage requirement changes. Cross-reference with ADP1871 for similar functionality with selectable switching frequencies. Verify pinout and thermal characteristics match before substituting.