MIC2546-1YTS Microchip

MIC2546/2547 Dual Programable Current Limit Switch General Description Features The MIC2546 and MIC2547 are integrated high-side dual 2.7V to 5.5V input power switches optimized for low loss dc power switching Adjustable current-limit up to 1.5A and other power management applications, including Reverse current flow blocking (no body diode) Advanced Configuration and Power Interface (ACPI). The 100 A typical on-state supply current per channel MIC2546/47 is a cost-effective, highly integrated solution that requires few external components to satisfy USB and 2 A typical off-state supply current ACPI requirements. 120m maximum on-resistance Load current management features include a precision Open-drain fault flag resistor-programmable output current-limit and a soft-start Thermal shutdown circuit which minimizes inrush current when the switch is Thermal shutdown output latch (MIC2547) enabled. Thermal shutdown, along with current-limit, 2ms (slow) turn-on and fast turnoff protects theswitch and the attached device. Available with active-high or active-low enable The MIC2546/47s open-drain flag outputs are used to indicate current-limiting or thermal shutdown to a local controller. The MIC2547 has an additional internal latch Applications which turns the output off upon thermal shutdown providing robust fault control. The enable signal is USB power distribution compatible with both 3V and 5V logic, and is also used as PCI Bus Power Switching the thermal shutdown latch reset for the MIC2547. Notebook PC The MIC2546 and MIC2547 are available in active-high ACPI power distribution and active-low enable versions in 16-pin TSSOP and SOP PC card hot swap applications packages. Inrush current-limiting Data sheets and support documentation can be found on Ideal for dual supply applications Micrels web site at www.micrel.com. Typical Application Typical Advanced Configuration and Power Interface (ACPI) Application UL Recognized Component Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2546/2547 Ordering Information Part Number (1) (1) Standard Pb-Free Enable Latch Junction Temp. Range Package MIC2546-1BM MIC2546-1YM Active High 40 to +85C 16-pin SOP MIC2546-1BTS MIC2546-1YTS Active High 40 to +85C 16-pin TSSOP MIC2546-2BM MIC2546-2YM Active Low 40 to +85C 16-pin SOP MIC2546-2BTS MIC2546-2YTS Active Low 40 to +85C 16-pin TSSOP MIC2547-1BM MIC2547-1YM Active High 40 to +85C 16-pin SOP MIC2547-1BTS MIC2547-1YTS Active High 40 to +85C 16-pin TSSOP MIC2547-2BM MIC2547-2YM Active Low 40 to +85C 16-pin SOP MIC2547-2BTS MIC2547-2YTS Active Low 40 to +85C 16-pin TSSOP Note: 1. Thermal Shutdown Latch. Pin Configuration MIC2546/2547 (OUTA) LOGIC, (ENA) CHARGE (FLGA) PUMP (INA) (ILIMA) (OUTB) LOGIC, (ENB) CHARGE (FLGB) PUMP (INB) (ILIMB) (GND) Function Pinout 16-Pin SOP (M) 16-Pin TSSOP (TS) M9999-012508-A January 2008 2