The ISL6141 is an 8-pin, negative voltage hot plug controller that allows a board to be safely inserted and removed from a live backplane. Inrush current is limited to a programmable value by controlling the gate voltage of an external N-channel pass transistor. The pass transistor is turned off if the input voltage is less than the Under-Voltage threshold, or greater than the Over-Voltage threshold. The IntelliTrip™ electronic circuit breaker and programmable current limit features protect the system against short circuits. When the Over-Current threshold is exceeded, the output current is limited for 600µs before the circuit breaker shuts down the FET. If the fault disappears before the 600µs time-out, normal operation resumes. In addition, the IntelliTrip™ electronic circuit breaker has a fast Hard Fault shutdown with a threshold set at 4 times the current limit value. When activated, the GATE is immediately turned off and then slowly turned back on for a single retry (soft-start). The active low PWRGD signal can be used to directly enable a power module (with a low enable input). The ISL6151 is the same device but has an active high PWRGD output.


  • Operates from -20V to -80V (-100V Absolute Max Rating)
  • Programmable Inrush Current
  • Programmable Over-Voltage Protection
  • Programmable Under-Voltage Protection
  • 135mV of hysteresis
  • Equals ~4.6V of hysteresis at the power supply
  • UVLO (Under-Voltage Lock-Out) ~ 16.5V
  • Programmable Current Limit with 600µs time-out
  • IntelliTrip™ electronic circuit breaker distinguishes between Over-Current and Hard Fault conditions
  • Fast shutdown for Hard Faults with a single retry (fault current > 4X current limit value).
  • Pin Compatible with ISL6140/50.
  • Power Good Control Output
  • Monitors both the DRAIN (voltage drop across the FET) and the GATE voltage; once both are OK, the Power Good output is latched in the active state.
  • PWRGD active high: ISL6151 (H version)
  • PWRGD active low: ISL6141 (L version)




  • VoIP (Voice over Internet Protocol) Servers
  • Telecom systems at -48V
  • Negative Power Supply Control
  • +24V Wireless Base Station Power


Type Title Date
Datasheet PDF 955 KB
Brochure PDF 8.73 MB
White Paper PDF 295 KB
Product Change Notice PDF 223 KB
Product Change Notice PDF 152 KB
Other PDF 2.20 MB
Application Note PDF 509 KB
Application Note PDF 397 KB
8 items

Design & Development

Boards & Kits

Boards & Kits