ADM1270ARQZ

Overview

The ADM1270ARQZ-R7 is a hot-swap voltage controller manufactured by Analog Devices Inc., designed for modular or battery-powered systems. It operates within a supply voltage range of 4 V to 60 V and features adjustable current limiting with foldback characteristics. The device includes power-fail detection, analog undervoltage/overvoltage protection, and programmable current-limit timers compliant with SOA. It utilizes an external P-channel FET for surge current control during system power-up and reverse polarity protection. The component is available in a 16-lead QSOP package and supports automatic retry or latch-off modes upon current fault occurrence.

Feature Summary

• Controls surge current via external P-channel FET during board insertion into live backplanes
• Provides reverse polarity input protection using an additional external P-channel FET
• Features adjustable current limiting with foldback behavior and programmable timer compliance
• Integrates power-good and fault outputs alongside analog overvoltage and undervoltage protection

Applications

• Industrial module power management
• Battery-powered portable instrumentation
• Modular system power distribution

Procurement Notes

Verify the specific suffix (e.g., -R7) against the required packaging format such as reel or cut tape. Confirm that the QSOP-16 package variant matches the design-in requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm availability status and lead times prior to ordering.

Selection Notes

Select this controller when managing high-voltage inputs up to 60 V in modular systems. It is suitable for applications requiring precise surge current control to prevent connector damage and bus voltage drops. Consider the external P-channel FET requirement for both load switching and reverse polarity protection. Evaluate the need for automatic retry versus latch-off functionality based on system recovery protocols.

Part Context

The ADM1270 belongs to the ADM1270 series of hot-swap voltage controllers from Analog Devices. It addresses transient current issues caused by discharged bypass capacitors charging from backplane buses. The device protects against permanent connector damage and system resets caused by voltage sags. It complements other hot-swap solutions like the ADM1273 and LTC4287 by offering high-voltage capability with flexible current limiting.

Replacement Considerations

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