MIC2544/48 Programmable Current-Limit High-Side Switch Features General Description 2.7V to 5.5V Input The MIC2544 and MIC2548 are integrated, high-side power switches optimized for low-loss DC power Adjustable Current-Limit up to 1.5A switching and other power management applications, Reverse Current Flow Blocking (No Body Diode) including Advanced Configuration and Power Interface 75 A Typical On-State Supply Current (ACPI). The MIC2544/48 are cost-effective, highly 1 A Typical Off-State Supply Current integrated solutions that require few external 120 m Maximum On-Resistance components to satisfy USB and ACPI requirements. Open-Drain Fault Flag Load current management features include a precision Thermal Shutdown resistor-programmable output current-limit and a soft-start circuit that minimizes inrush current when the Thermal Shutdown Output Latch (MIC2548) switch is enabled. Thermal shutdown, along with 2 ms (Slow) Turn-On and Fast Turn-Off current-limit, protects the switch and the attached Available with Active-High or Active-Low Enable device. Applications The MIC2544/48s open-drain flag output is used to USB Power Distribution indicate current-limiting or thermal shutdown to a local controller. The MIC2548 has an additional internal latch PCI Bus Power Switching that turns the output off upon thermal shutdown, Notebook PC providing robust fault control. The enable signal is ACPI Power Distribution compatible with both 3V and 5V logic, and is also used PC Card Hot Swap Applications as the thermal shutdown latch reset for the MIC2548. Inrush Current-Limiting The MIC2544 and MIC2548 are available in active-high and active-low enable versions in the 8-pin SOIC and 8-pin MSOP packages. Package Types MIC2544/MIC2548 MIC2544/MIC2548 8-PIN SOIC (M) 8-PIN MSOP (MM) EN 1 8 OUT EN 1 8 OUT FLG 2 7 IN FLG 2 7 IN GND 3 6 OUT GND 3 6 OUT ILIM 4 5 NC NC 4 5 ILIM 2017 Microchip Technology Inc. DS20005725B-page 1MIC2544/48 Typical Application Circuit TYPICAL ADVANCED CONFIGURATION AND POWER INTERFACE (ACPI) APPLICATION MIC2544-xYM SOIC Pinout Shown Functional Diagram DS20005725B-page 2 2017 Microchip Technology Inc.