CMPWR130 Datasheet, PDF (1/6 Pages) California Micro Devices Corp – 300mA SMARTOR Regulator with V Drive

CALIFORNIA MICRO DEVICES
CMPWR130
300mA SmartORTM Regulator with V Drive
AUX
Features
Applications
• Automatic detection of V_CC input supply
• Glitch-free output during supply transitions
• Built-in hysteresis during supply selection
• 300mA output maximum load current
• Overload current protection
• Short circuit current protection
• Operates from either V_CC or V_OUT
• 8-pin SOIC package
• PCI adapter cards
• Network Interface Cards (NIC’s)
• Dual power systems
• Systems with standby capabilities
Product Description
The SmartOR^TM CMPWR130 is a low dropout regulator
that delivers up to 300mA of load current at a fixed 3.3V
output. An internal threshold level (TYP 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 thresh-
old, 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.
PIN DIAGRAM AND APPLICATION CIRCUIT
Top View
V_CC
1
NC 2
NC 3
GND 4
8 DRIVE
7
V_OUT
6
V_OUT
5 NC
CMPWR130
8-Pin SOIC
Pin Diagram
+ _VAUX
– ^3.3V
GND
V_CC
5V +
–
+ C_IN
1µF
MGSF1PO2ELT1
CMPWR130
V_CC DRIVE
V_OUT
GND
+ C_OUT
4µF
V_OUT
3.3V
300mA
Typical Application Circuit
GND
Package
Pins
8
STANDARD PART ORDERING INFORMATION
Ordering Part Number
Style
Tubes
Tape & Reel
SOIC
CMPWR130S/T
CMPWR130S/R
© 2001 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corp
215 Topaz Street, Milpitas, California 95035  Tel: [phone]
3/5/2001
Fax: [phone]
Part Marking
CMPWR130S
C1670101
www.calmicro.com
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