General Description

The MIC2584 and MIC2585 are dual-channel positive voltage hot swap controllers designed to facilitate the safe insertion of boards into live system backplanes. The MIC2584 and MIC2585 are available in 16-pin and 24-pin TSSOP packages, respectively. Using a few external discrete components and by controlling the gate drives of external N-Channel MOSFET devices, the MIC2584/85 provides inrush current limiting and output voltage slew rate control in harsh, critical power supply environments. Additionally, the MIC2585 provides output turn-on sequencing and output tracking during turn-on and turn-off. In combination, the devices’ many features provide a simplified, robust solution for many network applications to meet the power sequencing and protection requirements of multiple-voltage logic systems.

Features

• 1.0V to 13.2V supply voltage operation

• Surge voltage protection up to 20V

• Current regulation limits inrush current regardless of

load capacitance

• Programmable inrush current limiting

• Electronic circuit breaker

• Dual-level overcurrent fault sensing eliminates false tripping

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

• Two sequenced output mode selections (MIC2585 only)

• ∆250mV supply tracking mode during turn-on/turn-off (MIC2585 only)

• Overvoltage and undervoltage output monitoring (Overvoltage for MIC2585 only)

• Undervoltage lockout protection

• /FAULT status output

• Power-On Reset and Power-Good status output (Power-Good for MIC2585 only)

Applications

• RAID systems

• Network servers

• Base stations

• Network switches

• Hot-board insertion