CMPWR300 Datasheet, PDF (1/11 Pages) California Micro Devices Corp – 500mA SMARTOR Dual Regulator with V switch

CALIFORNIA MICRO DEVICES
CMPWR300
500mA SmartOR^TM DUAL REGULATOR WITH V_AUX SWITCH
Features
• 8-pin Power SOIC package
• Continuous 3.3V output from three inputs
• Complete Power Management solution
• V_CC, V_SBY Regulator supplies 500mA output
• Built-in hysteresis when selecting input supplies
• Integrated switch has very low R_DS(ON) 0.12Ω (typ.)
• Large Bypass Capacitors on inputs not required
Pin Diagram
Applications
• PCI adapter cards with Wake-On-LAN
• Network Interface Cards (NICs)
• Multiple Power Systems
• Systems with Standby Capabilities
Product Description
The CMPWR300 is a dual input regulator with V_AUX switch ca-
pable of delivering 3.3V/500mA continuously. The output power
is provided from three independent input voltage sources on a
prioritized basis. Power is always taken in priority using the fol-
lowing order V_CC, V_SBY, and V_AUX.
When V_CC (5V) or V_SBY is present, the device automatically en-
ables the regulator and produces a stable 3.3V output at V_OUT.
When only V_AUX (3.3V) is present, the device provides a low
impedance direct connection (0.12Ω 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 both V_CC and V_SBY to be dynamically
switched without loss of output voltage.
Typical Application Circuit
Simplified Electrical Schematic
STANDARD PART ORDERING INFORMATION
Package
Ordering Part Number
Pins
Style
Part Marking
8
SOIC Power
CMPWR300SA
When placing an order please specify desired shipping: Tubes or Tape & Reel.
© 2000 Calirornia Micro Devices Corp. All rights reserved. CMPWR300™ is a trademark of California Micro Devices Corp.
12/5/2000
215 Topaz Street, Milpitas, California 95035 Tel: [phone]
Fax: [phone]
www.calmicro.com
C0621199
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