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MIC2525-2BN Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC2525-2BN Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 12 page January 2000 1 MIC2525 MIC2525 Micrel MIC2525 USB Power Control Switch Not Recommended for New Designs Refer to MIC2025 General Description The MIC2525 is an integrated high-side power switch, opti- mized for self-powered and bus-powered Universal Serial Bus (USB) applications. Few external components are nec- essary to satisfy USB requirements. The MIC2525 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 require- ments; and a flag output is available to indicate fault condi- tions 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 re- mains off unless there is a valid input voltage present, and 3.3V and 5V logic compatible enable inputs. The MIC2525 is a UL recognized component and is available in active-high and active-low versions in 8-pin DIP and SOIC packages. For new designs, please see the MIC2025/2075. Typical Application VBUS D+ D– GND USB Port Data EN OUT FLG IN ON/OFF OVERCURRENT MIC2525-2 3.3V USB Controller GND OUT NC VCC 5.0V 0.1µF 10k MIC5207-3.3 IN OUT GND 4.50V to 5.25V Upstream VBUS 100mA max. Ferrite Beads 150µF VBUS D+ D– GND Data 1µF 1µF 100k VIN GND 3.3V NC Single-Port USB Self-Powered Hub Features • Compliant to USB specifications • UL Recognized Component • 3V to 5.5V input • 500mA minimum continuous load current per port • 140m Ω maximum on-resistance • 1.25A maximum short circuit current limit • Open-drain fault flag pins • 110 µA typical on-state supply current • 1 µA 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 • 8-pin SOIC and DIP packages Applications • USB hosts and self-powered hubs • USB bus-powered hubs • Hot plug-in power supplies • Battery-charger circuits UL Recognized Component 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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