General Description
The Supertex HV301 and HV311 Hotswap Controllers provide control of power supply connection during insertion of cards or modules into live backplanes. They may be used in systems where active control is implemented in the negative lead of supplies ranging from ±10V to ±90V.

Features
❑ ±10V to ±90V Operation
❑ Built-in “normally on” turn-on clamp eliminates components
❑ UV/OV Lock Out & Power-on-Reset(POR) for Debouncing
❑ Sense resistor programmed circuit breaker
❑ Programmable circuit breaker holdoff
❑ Inrush control using either: i) servo or ii) feedback cap
❑ Feedback to Ramp pin means no Gate Clamp needed
❑ Application solution for input voltage step (diode “ORing”)
❑ Programmable Auto-Retry (tens of seconds if desired)
❑ Auto-Retry or Latched Operation
❑ Enable through Open Drain interface to UV or OV
❑ Low Power, <0.6mA , <0.4mA Sleep Mode
❑ PWRGD Flag
❑ Small SOIC-8 Package

Applications
❑ -48V Central Office Switching
❑ -24V Cellular and Fixed Wireless Systems
❑ -24V PBX Systems
❑ Line Cards
❑ -48V Powered Ethernet for VoIP
❑ Distributed Power Systems
❑ Power Supply Control
❑ +48V Storage Networks
❑ Electronic Circuit Breaker