ADM1075-1ACPZ-RL7

Overview

The ADM1075-1ACPZ-RL7 is a negative voltage hot swap controller designed for safe insertion and removal of boards from live backplanes. It operates from -35 V to -80 V with internal shunt regulation. Key parameters include a 25 mV/50 mV full-scale sense voltage, 1% accurate UVH/OV pins, and a 1.5% accurate UVL pin. The device features a 28-lead LFCSP package and supports PMBus/I2C interfaces for control and telemetry.

Feature Summary

• Constant power foldback for FET SOA protection
• Precision current and voltage measurement
• Soft start inrush current limit profiling
• PMBus/I2C interface for control and fault recording

Applications

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

Procurement Notes

Verify the specific suffix '-1' against official Analog Devices documentation to confirm exact electrical characteristics and pinout compatibility. Ensure the LFCSP-28 package matches your PCB footprint requirements. Confirm that the operating temperature range meets your system's environmental specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring robust protection against transient and nontransient short circuits on negative supply rails. The internal shunt regulator provides excellent voltage transient immunity, allowing direct powering from a 10 V rail to save dissipation. Consider the PMBus interface if digital monitoring and fault recording are required for system management.

Part Context

This part belongs to the ADM1075 family of hot swap controllers manufactured by Analog Devices. These devices are engineered for high-reliability environments where board insertion and removal must occur without disrupting active systems. The series emphasizes precise current limiting and comprehensive fault protection for negative voltage architectures.

Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic replacements may not support the specific PMBus commands or precision thresholds required by the original design.

FAQ

How does the ADM1075 handle inrush current?

It utilizes soft start inrush current limit profiling to manage power-up sequences safely.

What is the input voltage range?

The device typically operates from a negative voltage of -35 V to -80 V.