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MIC2548-2YMM Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC2548-2YMM Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 12 page June 2000 1 MIC2544/2548 MIC2544/2548 Micrel MIC2544/2548 Programmable Current Limit High-Side Switch Preliminary Information General Description The MIC2544 and MIC2548 are integrated high-side power switches optimized for low loss dc power switching and other power management applications, including Advanced Con- figuration and Power Interface (ACPI). The MIC2544/48 is a cost-effective, highly integrated solution that requires few external components to satisfy USB and ACPI requirements. Load current management features include a precision resis- tor-programmable output current-limit and a soft-start circuit which minimizes inrush current when the switch is enabled. Thermal shutdown, along with current-limit, protects the switch and the attached device. The MIC2544/48’s open-drain flag output is used to indicate current-limiting or thermal shutdown to a local controller. The MIC2548 has an additional internal latch which turns the output off upon thermal shutdown providing robust fault control. The enable signal is compatible with both 3V and 5V logic, and is also used as the thermal shutdown latch reset for the MIC2548. The MIC2544 and MIC2548 are available in active-high and active-low enable versions in the 8-pin SOP (small-outline package) and 8-pin MSOP (micro-small-outline package). Typical Application EN FLG GND ILIM OUT IN OUT NC MIC2544-xBM On/Off Peripheral 0.1µF RSET +5V RFLG 33µF SOP pinout shown Typical Advanced Configuration and Power Interface (ACPI) Application Features • 2.7V to 5.5V input • Adjustable current-limit up to 1.5A • Reverse current flow blocking (no “body diode”) • 75 µA typical on-state supply current • 1 µA typical off-state supply current • 120m Ω maximum on-resistance • Open-drain fault flag • Thermal shutdown • Thermal shutdown output latch (MIC2548) • 2ms (slow) turn-on and 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 Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com |
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