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