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CMPWR280TO Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CMPWR280TO Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 10 page © 2000 Calirornia Micro Devices Corp. All rights reserved. 3/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CALIFORNIA MICRO DEVICES CMPWR280 1 Features Automatic selection of V CC or VSBY Drive control signal for external V AUX switch Continuous 3.3V output supply Glitch-free output during supply transitions Built-in hysteresis for supply selection V CC regulates up to 1.5A output current V SBY regulates up to 375mA output current Foldback current limiting Thermal shutdown with hysteresis On-chip controller operates from V CC, VSBY or VOUT Applications Peripheral Component Interface (PCI) Adapter Cards Network Interface Cards (NICs) Multiple Powered Systems Systems with Standby Capabilities Product Description The California Micro Devices SmartORTM CMPWR280 is a fully protected Dual-Input low dropout CMOS regulator that also provides the necessary control signal for driving an external auxiliary Pchannel MOSFET switch. The SmartORTM device au- tomatically selects one of three possible inputs on a priority basis: V CC (1.5A), VSBY (375mA) or VAUX via the drive signal used to control an external switch. V CC is given first priority. In the event of the VCC supply being powered down, the device will automatically deselect the V CC prior to regulator dropout and immediately select V SBY (second priority) as its power source. If neither V CC nor VSBY are present the drive control output will turn-on anexternal P-channel MOSFETswitchfromanauxiliary 3.3V supply V AUX to VOUT. All the necessary control circuitry needed to provide a smooth and automatic transition between all three supplies has been incorporated. This allows V CC to be dynamically switched with- out loss of output voltage. The CMPWR280 is internally protected against output short-circuits, current overload and thermal overload. CMPWR300 is a trademark of California Micro Devices Corp. Pin Diagram Typical Application Circuit Simplified Electrical Schematic When placing an order please specify desired shipping: Tubes or Tape & Reel. 1.5A SmartORTM Dual Regulator with V AUX Drive T S R A D N A N O I T A M R O F N I G N I R E D R O T R A P D e g a k c a Pr e b m u N t r a P g n i r e d r O s n i Pe l y t Sg n i k r a M t r a P 53 6 2 O TO T 0 8 2 R W P M C C0660200 |
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