IMP2524/27 Quad USB High-Side Power Switch with Fault Detection
■The IMP2524/2527 conform to the new USB 1.1 standard. Fault current is limited to 750mA typically, and a flag output for each switch conveys fault information to the local USB controller. The IMP252x “Soft-Start” function ramps the ON-current to eliminate any excessive voltage drop on the input side that could occur when capacitive loads are charged.
■Self-monitoring features include thermal shutdown to prevent catastrophic switch failure from high-current loads and undervoltage lockout (UVLO) that insures that the device remains OFF unless there is sufficient supply voltage present.
■The switch Enable input logic can interface with both 3.3V and 5V logic. Both active-HIGH (-1 devices) and active-LOW (-2 devices) enable logic versions are available. Supply current is a low 0.75μA when disabled and just 110μA when enabled
■The quad IMP2524/7 devices are available in 16-pin DIP and 16-pin SO packages and are pin compatible replacements for the Micrel MIC2524-1/-2 and MIC2527-1/2 devices. IMP offers a complete family of USB power management products. For single-switch applications see the IMP2525 and IMP2525A data sheets. The single-switch IMP2525A features a 0.07Ω switch resistance. For dual-switch applications, refer to the IMP2526 data sheet.
●Key Features
■USB Rev. 1.1 Compliant
■Four independent switches
■2.7V to 5.5V input operation
■Low MOSFET ON resistance
◆IMP2524: 0.1Ω, 0.14Ω maximum
◆IMP2527: 0.2Ω, 0.3Ω maximum
■500mA continuos load current per switch
■Low supply current
◆110μA ON-state current, 0.75μA OFF-state current
■1.25A maximum current limit, 750mA typical
■Thermal shutdown 2.4V undervoltage lockout (UVLO)
■Open-drain flag output
◆Undervoltage
◆Current limit
◆Thermal shutdown
■Output can be force higher than input
■Active HIGH(-1) and active LOW(-2) enable
■16-pin SO and DIP packages, Die available
■Pin compatible with the Micrel MIC2524 and MIC2527
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IMP2524-1BWM 、 IMP2524-2BWM 、 IMP2524-1BN 、 IMP2524-2BN 、 IMP2527-1BWM 、 IMP2527-2BWM 、 IMP2527-1BN 、 IMP2527-2BN 、 IMP2524 、 IMP2527 、 IMP252x 、 IMP2525A 、 IMP2525 |
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[ USB host ][ self-powered hubs ][ USB video monitors ][ USB printers ] |
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Datasheet |
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Please see the document for details |
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SO;DIP |
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English Chinese Chinese and English Japanese |
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08/08/05 |
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Revision:A |
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139 KB |
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