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MIC2524

Micrel Semiconductor
Part Number MIC2524
Manufacturer Micrel Semiconductor
Description Quad USB Power Control Switch Not Recommended for New Designs
Published Mar 26, 2005
Detailed Description MIC2524/2527 Micrel MIC2524/2527 Quad USB Power Control Switch Not Recommended for New Designs Refer to MIC2027 Gener...
Datasheet PDF File MIC2524 PDF File

MIC2524
MIC2524

Overview
MIC2524/2527 Micrel MIC2524/2527 Quad USB Power Control Switch Not Recommended for New Designs Refer to MIC2027 General Description The MIC2524 and MIC2527 are cost-effective high-side power switches with four independently controlled channels, optimized for self-powered and bus-powered Universal Serial Bus (USB) applications.
Few external components are necessary to satisfy USB requirements.
The MIC2524/7 satisfies the following USB requirements: each switch channel supplies up to 500mA as required by USB downstream devices; the switch’s low on-resistance meets USB voltage drop requirements; fault current is limited to typically 750mA, well below the UL 25VA safety requirements; and a flag output is available to indicate fault conditions to the local USB controller.
Soft start eliminates the momentary voltage drop on the upstream port that may occur when the switch is enabled in bus-powered applications.
Additional features include thermal shutdown to prevent catastrophic switch failure from high-current loads, undervoltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, and 3.
3V and 5V logic compatible enable inputs.
The MIC2524/7 is available in active-high and active-low versions in 16-pin DIP and SOIC packages.
Features • • • • • • • • • • • • • • • • • • • • Compliant to USB specifications UL Recognized Component 4 independent switches 3V to 5.
5V input 500mA minimum continuous load current per port 140mΩ maximum on-resistance (MIC2524) 1.
25A maximum short circuit current limit Individual open-drain fault flag pins 220µA on-state supply current 1µA typical off-state supply current Output can be forced higher than input (off-state) Thermal shutdown 2.
4V typical undervoltage lockout (UVLO) 1ms turn-on (soft-start) and fast turnoff Active-high or active-low enable versions 16-pin SOIC and DIP packages USB bus-powered hubs USB self-powered hubs USB monitors USB printers Applications Typical Application MIC25...


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