General Description

The MIC2044 and MIC2045 are high-side MOSFET switches optimized for general purpose power distribution applications that require circuit protection. These devices switch up to 5.5V and as low as 0.8V while offering both programmable current limiting and thermal shutdown to protect the device and the load. A fault status output is provided to indicate overcurrent and thermal shutdown fault conditions. Both devices employ soft-start circuitry to minimize the inrush current in applications that employ highly capacitive loads. Additionally, for tighter control over inrush current during start up, the output slew-rate may be adjusted by an external capacitor.

Features

• 30mΩ maximum on-resistance

• 0.8V to 5.5V operating range

• Adjustable current limit

• Up to 6A continuous output current

• Short circuit protection

• Very fast reaction to short circuits

• Thermal shutdown

• Adjustable slew-rate control

• Circuit breaker mode (MIC2045)

• Fault status flag

• Power-Good detection

• Undervoltage lockout

• No reverse current flow through the switching MOSFET when OFF or disabled

• Low quiescent current

Applications

• Docking stations

• LAN servers

• WAN switches

• Hot swap board insertions

• Notebook PCs

• PDAs

• Base stations

• RAID controllers

• USB hosts