IMP2525 USB High-Side Power Switch
●0.14Q "ON" resistance at 3V
●MIC2525 pin compatible
■The IMP2525 high-side power switch IC is designed for self-powered and bus-powered Universal Serial Bus (USB) power supply and power management applications. The IMP2525 conforms to USB standards with a low output switch ON-resistance (RON) and minimal voltage drop across the switch. The fault current is limited to 750mA typically, and a flag output conveys fault conditions to the local USB controller. The IMP2525 provides a “Soft-Start” function that ramps up the ON-current to eliminate any excessive voltage drop on the input side that could occur due to charging a capacitive load in bus-powered applications. 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 a valid supply voltage present. The Enable input logic can be interfaced with both 3.3V and 5V logic. Both active-HIGH and active-LOW enable logic versions are available. The IMP2525 devices are available in 8-pin DIP and 8-pin SO packages.
■IMP offers a complete family of USB power management products. For dual-switch applications see the IMP2526 data sheet and for quad-switch application, see the IMP2524. The single-switch IMP2525A features a 50% lower switch resistance, 0.07Ω.
●Key Features
■Meets or exceeds USB Rev. 1.1 specification
■Low MOSFET RON (0.14Ω at 3V)
■2.7V to 5.5V input operation
■Current limiting
■Soft-start turn-on (1ms) prevents turn-on glitches
■500mA continuous load current
■MOSFET short-circuit current limit (1.25A max)
■Low supply current
◆110μA ON state current, 1μA OFF state current
■Active-LOW or Active-HIGH Enable input
■3.3V or 5V logic compatibility
■Fault Flag indicates three fault conditions:
◆Undervoltage
◆Current limit
◆Thermal shutdown
■Open-drain Fault Flag output
■2.4V Undervoltage Lockout (UVLO)
■Pin compatible with the Micrel MIC2525
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IMP2525-1BM 、 IMP2525-2BM 、 IMP2525-1BN 、 IMP2525-2BN 、 IMP2525 、 IMP2525A 、 IMP2525-1 、 IMP2525-2 |
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high-side power switch IC 、 High-Side Power Switch 、 Single switch |
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[ USB power management ][ USB hosts ][ self-powered hubs ][ Battery-charger circuits ][ power supplies ] |
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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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185 KB |
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