General Description

The MIC2042 and MIC2043 are high-side MOSFET switches optimized for general purpose power distribution applications which require circuit protection. The 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 in order to detect 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

• 60mΩ max. on-resistance

• 0.8V to 5.5V operating range

• Adjustable current limit

• Power-Good detection

• Up to 3A continuous output current

• Short-circuit protection with thermal shutdown

• Adjustable slew-rate control

• Circuit breaker mode (MIC2043)

• Fault status flag

• Undervoltage lockout

• Output MOSFET reverse current flow block when disabled

• Very fast reaction to short-circuits

• Low quiescent current

Applications

• Docking stations

• Notebook PCs

• PDAs

• Hot swap board insertions

• RAID controllers

• USB hosts

• ACPI power distribution