SMH4811A Datasheet | Summit Microelectronics

Features l Supply Range ±20VDC to >±500VDC l Versatile Card Insertion Detection Supports: w Multi-length Pin Systems w Card Injector Switch Sensing w Programmable Debounce Periods l Control Powering-on of DC/DC Converters l Highly Programmable Host Voltage Monitoring w Programmable Under- and Over-voltage Detection w Programmable UV Filter l Programmable Power Good Delay for enabling the DC/DC Converter l Programmable Circuit Breaker Function w Programmable Over-Current Filter w Programmable Quick-Trip™ Circuit Breaker Values l 2.5V and 5.0V reference outputs w Easy Expansion of External Monitor Functions DESCRIPTION The SMH4811A is designed to control hot swapping of plug-in cards operating from a single supply ranging from 20V to 500V. It provides under-voltage and over-voltage monitoring of the host power supply, drives an external power MOSFET switch that connects the supply to the load, and also protects against over-current conditions that might disrupt the host supply. When the input and output voltages to its controls are within specification, it provides a Power Good logic output that may be used to turn loads on (e.g., an isolated-output DC-DC converter, or drive a LED status light). Additional Features of the SMH4811A include: temperature sense or master enable input, 2.5V and 5V reference outputs for expanding monitor functions, two Pin-Detect enable inputs for fault protection, and duty-cycle over-current protection. SIMPLIFIED APPLICATION DRAWING 0V Disable/Enable VDD Pin Detect PD1# ENPG FAULT# UV PG# DC/DC Pin Detect PD2# VSS CBSENSE VGATE 2.5VREF 5.0VREF - 48V Characteristics subject to change without notice 2044 SAD 5.1 ©SUMMIT MICROELECTRONICS, Inc., 2000 - 300 Orchard City Dr., Suite 131 - Campbell, CA 95008 - Phone 408-378-6461 - FAX 408-378-6586 - .summitmicro. 2044 6.1 2/8/01 Preliminary .. PIN CONFIGURATION 16-Pin SOIC REMENDED OPERATING CONDITIONS Temperature - 40°C to 85°C. DRAIN SENSE VGATE EN/TS PD1#...