HV302

HV302 HV312 __________________________________________________________________________________________________________________ Initial Release Sequencing Hotswap Controllers (Negative Supply Rail) Features -10V to 90V or +10V to +90V Operation Four PWRGD Flags with Programmable Delays Integrated “normally-on” Gate Clamp eliminates components UV/OV Lock Out & Power-On-Reset (POR) for Debouncing Sense resistor programmed Circuit Breaker & Servo Limit Programmable Circuit Breaker Delay Inrush control using either: Servo or Feedback Capacitor Feedback to RAMP pin saves gate protection components 100ms Start Up Timeout Protection for Output Overload Programmable Inrush Current di/dt Control Programmable Auto-Retry (tens of seconds if desired) Auto-Retry or Latched Operation Application solution for input voltage step (diode “ORing”) Enable through Open Drain interface to UV or OV Low Power, 0.6mA Active Mode, 0.4mA Sleep Mode Small SOIC-14 Package General Description The HV302 and HV312 Hotswap Controllers perform current limiting, circuit breaker protection, over and under voltage detection power management functions during insertion of cards or modules into live backplanes and connectors. They may be used in systems where active control is implemented in the negative lead of supplies ranging from -10V to -90V or +10V to +90V. During initial power application the external pass device is held off by a “normally-on” circuit that clamps its gate low. Thereafter UV/OV and power-on...