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CMPWR330SAT Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CMPWR330SAT Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 8 page CALIFORNIA MICRO DEVICES 3/6/2001 1 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CMPWR330 ©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices. 400mA SmartORTM Dual Regulator with V AUX Switch Features • Continuous 3.3V output from three inputs • Complete power management solution •V CC, VSBY regulator supplies 400mA output • Built-in hysteresis when selecting input supplies • Integrated switch has very low R DS(ON) 0.25Ω (TYP) • Foldback current limiting protection • Thermal overload shutdown protection • 8-pin power SOIC package Product Description The CMPWR330 is a dual input regulator with a fully integrated V AUX switch capable of delivering up to 400mA continuously at 3.3V. The output power is provided from three independent input voltage sources on a prioritized basis. Power is always taken in priority using the following order V CC, VSBY, and VAUX. When V CC (5V) or VSBY is present, the device automati- cally enables the regulator and produces a stable 3.3V output at V OUT. Applications • PCI adapter cards with Wake-On-LAN • Network Interface Cards (NICs) • Multiple power systems • Systems with standby capabilities C1680101 Pin Diagram When only V AUX (3.3V) is present, the device provides a low impedance direct connection (0.25 Ω TYP) from V AUX to V OUT. All the necessary control circuitry needed to provide a smooth and automatic transition between all three supplies has been incorporated. This allows the V CC input supply to be dynamically switched without loss of output voltage. PIN DIAGRAM AND ELECTRICAL SCHEMATIC GND Top View CMPWR330 8-Pin Power SOIC VAUX 5 4 GND VOUT 6 3 GND VCC 7 2 GND VSBY 8 1 STANDARD PART ORDERING INFORMATION Package Ordering Part Number Pins Style Tubes Tape & Reel Part Marking 8 Power SOIC CMPWR330SA/T CMPWR330SA/R CMPWR330SA Typical Application Circuit VCC VCC VAUX VSBY GND GND VOUT VOUT 3.3V 400mA CMPWR330 VAUX 3.3V 10µF + – + – 1µF VSBY GND + – 1µF 5V 5V |
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