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CMPWR150SA Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CMPWR150SA Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 8 page © 1999 California Micro Devices Corp. All rights reserved. 9/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CMPWR150 CALIFORNIA MICRO DEVICES 500mA / 3.3V SmartOR POWER REGULATOR Features Pin Diagrams Automatic detection of V CC input supply Drive output logic to control external switch Glitch-free output during supply transitions 500mA output maximum load current Built-in hysteresis during supply selection Controller operates from either V CC or VOUT 8-pin SOIC Thermal or 5-pin TO-263 packages Applications PCI adapter cards Network Interface Cards (NICs) Dual power systems Systems with standby capabilities See Application Note AP-211 Product Description California Micro Devices SmartORTM CMPWR150 is a low dropout regulator that delivers up to 500mA of load current at a fixed 3.3V output. An internal threshold level (typically 4.1V) is used to prevent the regulator from being operated below dropout voltage. The device continuously monitors the input supply and will automatically disable the regulator when V CC falls below the threshold level. When the regulator is disabled, the control signal Drive (Active Low) is enabled, which allows an external PMOS switch to power the load from an auxiliary 3.3V supply. When V CC is restored to a level above the select threshold, the control signal for the external PMOS switch is disabled and the regulator is once again enabled. All the necessary control circuitry needed to provide a smooth and automatic transition between the supplies has been incorporated. This allows V CC to be dynamically switched without loss of output voltage. The CMPWR150 is available in either an 8-pin SOIC thermally enhanced package, ideal for space critical applications, or a 5-pin TO-263 package. C0590899 N O I T A M R O F N I G N I R E D R O T R A P D R A D N A T S e g a k c a P r e b m u N t r a P g n ir e d r O s n i Pe l y t Sg n i k r a M t r a Pl e e R & e p a Ts e b u T 8l a m r e h T C I O SA S 0 5 1 R W P M CR / A S 0 5 1 R W P M CT / A S 0 5 1 R W P M C 53 6 2 - O TO T 0 5 1 R W P M CR / O T 0 5 1 R W P M CT / O T 0 5 1 R W P M C Typical Application Circuit Simplified Electrical Schematic SmartOR is a trademark of California Micro Devices Corp. CMPWR150 CMPWR150TO 5-pin TO-263 Package CMPWR150SA 8-pin SOIC Thermal Package n.c. GND V CC GND V OUT GND Drive GND n.c. V CC V OUT GND Drive Top View Top View |
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