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CMPWR150SA Datasheet(PDF) 1 Page - California Micro Devices Corp

Part # CMPWR150SA
Description  500mA/3.3V SMARTOR Power Regulator
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Manufacturer  CALMIRCO [California Micro Devices Corp]
Direct Link  http://www.calmicro.com
Logo CALMIRCO - California Micro Devices Corp

CMPWR150SA Datasheet(HTML) 1 Page - California Micro Devices Corp

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© 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 (NIC’s)
• 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
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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
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