General Description

The MIC2085 and MIC2086 are single channel positive voltage hot swap controllers designed to allow the safe insertion of boards into live system backplanes. The MIC2085and MIC2086 are available in 16-pin and 20-pin QSOP packages, respectively. Using a few external components and by controlling the gate drive of an external N-Channel MOSFET device, the MIC2085/86 provide inrush current limiting and output voltage slew rate control in harsh, critical power supply environments.

Features

• MIC2085: Pin for pin functional equivalent to the LTC1642

• 2.3V to 16.5V supply voltage operation

• Surge voltage protection to 33V

• Operating temperature range –40°C to 85°C

• Active current regulation limits inrush current independent of load capacitance

• Programmable inrush current limiting

• Analog foldback current limiting

• Electronic circuit breaker

• Dual-level overcurrent fault sensing

• Fast response to short circuit conditions (< 1µs)

• Programmable output undervoltage detection

• Undervoltage lockout protection

• Power-on reset (MIC2085/86) and power-good (MIC2086) status outputs

• /FAULT status output

• Driver for SCR crowbar on overvoltage

Applications

• RAID systems

• Cellular base stations

• LAN servers

• WAN servers

• InfiniBand™ Systems

• Industrial high side switching