General Description

The MIC2545A and MIC2549A are integrated high-side power switches optimized for low-loss DC power switching and other power-management applications, including advanced configuration and power interface (ACPI). The MIC2545A/49A is a cost-effective, highly-integrated solution that requires few external components to satisfy USB and ACPI requirements.

Features

• 2.7V to 5.5V input

• Adjustable current-limit up to 3A

• Reverse current flow blocking

• 90µA typical on-state supply current

• 1µA typical off-state supply current

• 50mΩ maximum on-resistance

• Open-drain fault flag

• Thermal shutdown

• Thermal-shutdown output latch (MIC2549A)

• 2ms (slow) soft-start turn-on, fast turnoff

• Available with active-high or active-low enable

Applications

• USB power distribution

• PCI Bus Power Switching

• Notebook PC

• ACPI power distribution

• PC card hot swap applications

• Inrush current-limiting