DESCRIPTION

The SMH4803 is designed to control hot swapping of plug-in cards operating from a single supply ranging from 20V to 500V. The SMH4803 hot-swap controller provides under-voltage and over-voltage monitoring of the host power supply, it 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.

FEATURES

? Supply Range ±20VDC to >±500VDC

? Versatile Card Insertion Detection Supports Both

– Multi-length Pin Systems

– Card Injector Switch Sensing

? Control Up to Four Loads or a Primary Load and 3 DC/DC Converters

? Highly ProgrammableHost Voltage Monitoring

– ProgrammableUnder- and Over-voltage Detection

? ProgrammablePower Good Delays for Sequencing DC/DC Converters

? ProgrammableCircuit Breaker Function

– ProgrammableOver-current Filter

– ProgrammableQuick-Trip?Circuit Breaker Values

– ProgrammableCircuit Breaker Mode

? Duty-Cycle Mode

? Latched Mode

? 2.5V and 5.0V reference outputs

– Easy Expansion of External Monitor Functions