ADM1270

RECOMMENDED FOR NEW DESIGNS

High Voltage Input Protection Device

Data Sheet (Rev. A) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.17

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Overview

Controls supply voltages from 4 V to 60 V
Gate drive for low voltage drop reverse supply protection
Gate drive for P-channel FETs
Inrush current limiting control
Adjustable current limit
Foldback current limiting
Automatic retry or latch-off on current fault
Programmable current-limit timer for safe operating area (SOA)
Power-good and fault outputs
Analog undervoltage (UV) and overvoltage (OV) protection
16-lead, 3 mm × 3 mm LFCSP
16-lead QSOP

The ADM1270 is a current-limiting controller that provides inrush current limiting and overcurrent protection for modular or battery-powered systems. When circuit boards are inserted into a live backplane, discharged supply bypass capacitors draw large transient currents from the backplane power bus as they charge. These transient currents can cause permanent damage to connector pins, as well as dips on the backplane supply that can reset other boards in the system.

The ADM1270 is designed to control the inrush current, when powering on the system, via an external P-channel field effect transistor (FET).

To protect the system from a reverse polarity input supply, there is a provision made to control an additional external P-channel FET. This feature prevents reverse current flow in case of a reverse polarity connection, which can damage the load or the ADM1270. The ADM1270 is available in a 3 mm × 3 mm, 16-lead LFCSP and a 16-lead QSOP.

Applications

Industrial modules
Battery-powered/portable instrumentation

Part Models: 4
1ku List Price: Starting From $1.17

Documentation

Data Sheet 1

ADM1270: High Voltage Input Protection Device Data Sheet (Rev.A) 12/01/2014

User Guide 1

UG-760: Evaluating the ADM1270 High Voltage Input Protection Device (Rev.A) 04/14/2016

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADM1270ACPZ-R2	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM1270ACPZ-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM1270ARQZ	16-Lead QSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM1270ARQZ-R7	16-Lead QSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

ADM1270 Design Worksheet Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications

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Evaluation Kits

ADM1270 Evaluation Board

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Product Details

The ADM1270CP-EVALZ and ADM120RQ-EVALZ evaluation boards are used to demonstrate the functionality of the ADM1270 high voltage input protection device.

Simple device measurements, such as over voltage, undervoltage, and overcurrent protection can be demonstrated with just a single voltage source, a voltmeter, an ammeter, and load resistors.

Features