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CMPWR330SAT Datasheet(PDF) 1 Page - California Micro Devices Corp

Part # CMPWR330SAT
Description  400mA SMARTOR Dual Regulator with V switch?
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Manufacturer  CALMIRCO [California Micro Devices Corp]
Direct Link  http://www.calmicro.com
Logo CALMIRCO - California Micro Devices Corp

CMPWR330SAT Datasheet(HTML) 1 Page - California Micro Devices Corp

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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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