The ISL6142/52 are 14 pin, negative voltage hot plug controllers that allow 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 PWRGD/PWRGD outputs can be used to directly enable a power module. When the Gate and DRAIN voltages are both considered good the output is latched in the active state.

Features

? Operates from -20V to -80V (-100V Absolute Max Rating)

? Programmable Inrush Current

? Programmable Time-Out

? Programmable Current Limit

? Programmable Over-Voltage Protection

? Programmable Under-Voltage Protection

- 135 mV of hysteresis ~4.7V of hysteresis at the power supply

? VDD Under-Voltage Lock-Out (UVLO) ~ 16.5V

? IntelliTrip? Electronic Circuit Breaker distinguishes between severe and moderate faults

- Fast shutdown for short circuit faults with a single retry (fault current > 4X current limit value).

? FAULT pin reports the occurrence of an Over-Current Time-Out

? Disable input controls GATE shutdown and resets Over-Current fault latch

? Load Current Monitor Function

- ISOUT provides a scaled version of the load current

- A resistor from ISOUT to -VIN provides current to voltage conversion

? Power Good Control Output

- Output latched “good” when DRAIN and GATE voltage thresholds are met.

- (PWRGD active low: ISL6142 (L version)

- PWRGD active high: ISL6152 (H version)

? Pb-free available

Applications

? VoIP (Voice over Internet Protocol) Servers

? Telecom systems at -48V

? Negative Power Supply Control

? +24V Wireless Base Station Power