ADM1075-2ACPZ

Overview

The ADM1075-2ACPZ is a full-featured, negative voltage hot swap controller manufactured by Analog Devices. Designed for safe insertion and removal of boards from live backplanes, it supports constant power foldback and high-accuracy digital current and voltage measurement. The device provides precise current limiting and protection against transient and non-transient short circuits, overvoltage, and undervoltage conditions. It typically operates from negative voltages ranging from -35 V to -80 V and features an internal shunt regulator for excellent voltage transient immunity. The component includes a PMBus/I2C interface for control, telemetry, and fault recording, housed in a 28-lead LFCSP package.

Feature Summary

• Constant power foldback functionality for FET SOA protection
• Precision digital current and voltage measurement with less than 1.0% accuracy
• Internal shunt regulator enabling operation from wide input ranges
• Integrated PMBus and I2C interface for system control and telemetry

Applications

• Telecommunication and data communication equipment
• Central office switching systems
• -48 V distributed power systems
• High availability servers

Procurement Notes

Verify the specific suffix 'ACPZ' against official Analog Devices documentation to confirm the exact package type and tape-and-reel configuration. Ensure compatibility with -48 V backplane architectures requiring negative voltage hot swap capabilities. Confirm that the required PMBus or I2C protocol support aligns with the host controller's interface specifications before procurement.

Selection Notes

Select this component when designing systems requiring robust protection for negative voltage rails, specifically around -48 V. The internal shunt regulator simplifies power supply design by allowing direct powering from a 10 V rail. Consider the 28-lead LFCSP package for space-constrained applications. Verify that the precision measurement requirements are met by the device's specified accuracy levels for both current and voltage sensing.

Part Context

The ADM1075 belongs to Analog Devices' family of hot swap controllers designed for high-reliability infrastructure. It addresses the need for safe board insertion in live environments while providing detailed monitoring via digital interfaces. This specific model targets negative voltage applications common in telecommunications and server infrastructure, offering integrated protection and control features.

Replacement Considerations

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