GENERAL DESCRIPTION

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.

FEATURES

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

APPLICATIONS

Industrial modules

Battery-powered/portable instrumentation