CMPWR330 Datasheet, PDF (1/8 Pages) California Micro Devices Corp – 400mA SMARTOR Dual Regulator with V switch

CALIFORNIA MICRO DEVICES
CMPWR330
400mA SmartOR^TM Dual Regulator with V_AUX Switch
Features
Applications
• Continuous 3.3V output from three inputs
• Complete power management solution
• V_CC, V_SBY 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
• PCI adapter cards with Wake-On-LAN
• Network Interface Cards (NICs)
• Multiple power systems
• Systems with standby capabilities
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 , V , and V .
CC SBY
AUX
When V_CC (5V) or V_SBY is present, the device automati-
cally enables 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 (0.25Ω 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
Top View
V_SBY
1
V_CC
2
V_OUT
3
V_AUX
4
8 GND
7 GND
6 GND
5 GND
CMPWR330
8-Pin Power SOIC
Pin Diagram
V_{SBY +}
5V ^{– 1µF}
GND
CMPWR330
V_SBY
V_{CC +}
5V ^–
V_CC
V_AUX
V_OUT
1µF
GND
+ _VAUX
– 3.3V
V_OUT
3.3V
400mA
10µF
GND
Typical Application Circuit
Package
Pins
8
STANDARD PART ORDERING INFORMATION
Ordering Part Number
Style
Tubes
Tape & Reel
Power SOIC
CMPWR330SA/T
CMPWR330SA/R
Part Marking
CMPWR330SA
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
215 Topaz Street, Milpitas, California 95035  Tel: [phone]
3/6/2001
Fax: [phone]
C1680101
www.calmicro.com
1