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CMPWR280 Datasheet(PDF) 1 Page - ON Semiconductor |
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CMPWR280 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 11 page Semiconductor Components Industries, LLC, 2011 April, 2011 − Rev. 3 1 Publication Order Number: CMPWR280/D CMPWR280 Dual Input SmartORt Power Switch Product Description The ON Semiconductor’s SmartOR t CMPWR280 is a fully protected Dual−Input low−dropout CMOS regulator that also provides the necessary control signal for driving an external auxiliary P−channel MOSFET switch. The SmartOR t device automatically selects one of three possible inputs on a priority basis: VCC (1.5 A), VSBY (375 mA) or VAUX via the drive signal used to control an external switch. VCC is given first priority. In the event of the VCC supply being powered down, the device will automatically deselect the VCC prior to regulator dropout and immediately select VSBY (second priority) as its power source. If neither VCC nor VSBY are present the drive control output will turn−on an external P−channel MOSFET switch from an auxiliary 3.3 V supply VAUX to VOUT. All the necessary control circuitry needed to provide a smooth and automatic transition between all three supplies has been incorporated. This allows VCC to be dynamically switched without loss of output voltage. The CMPWR280 is internally protected against output short−circuits, current overload and thermal overload. The CMPWR280 is housed in a standard, 5−lead TO−263 package and is available with optional lead−free finishing. Features Selects from 3 Input Voltages and Provides 3.3 V Output Automatic Selection of VCC, VSBY or VAUX Drive Control Signal for External VAUX Switch Glitch−Free 3.3 V Output During Supply Transitions Built−In Hysteresis for Supply Selection VCC Regulates Up to 1.5 A Output Current VSBY Regulates Up to 375 mA Output Current Foldback Current Limiting Thermal Shutdown with Hysteresis Standard 5−lead TO−263 Package These Devices are Pb−Free and are RoHS Compliant Applications Peripheral Component Interface (PCI) Adapter Cards Network Interface Cards (NICs) Multiple Powered Systems Systems with Standby Capabilities MARKING DIAGRAM Device Package Shipping† ORDERING INFORMATION http://onsemi.com CMPWR280TO TO−263 (Pb−Free) 750/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. TO−263 TO/TN SUFFIX CASE 418AH CMPWR280TN TO−263 (Pb−Free) 750/Tape & Reel CMPWR280 = Specific Device Code XX = TO/TN A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week G = Pb−Free Package CMPWR280XX AWLYWWG 1 |
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