CMPWR280 Datasheet, PDF (1/11 Pages) California Micro Devices Corp – 1.5A SMARTOR Dual Regulator with Vaux Drive

CMPWR280
Dual Input SmartORt Power
Switch
Product Description
The ON Semiconductor’s SmartORt CMPWR280 is a fully
protected Dual−Input low−dropout CMOS regulator that also provides
the necessary control signal for driving an external auxiliary
P−channel MOSFET switch. The SmartORt device automatically
selects one of three possible inputs on a priority basis: V_CC (1.5 A),
V_SBY (375 mA) or V_AUX via the drive signal used to control an
external switch.
V_CC is given first priority. In the event of the V_CC supply being
powered down, the device will automatically deselect the V_CC prior to
regulator dropout and immediately select V_SBY (second priority) as its
power source.
If neither V_CC nor V_SBY are present the drive control output will
turn−on an external P−channel MOSFET switch from an auxiliary
3.3 V supply 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 V_CC to be dynamically switched without loss of output
voltage.
The CMPWR280 is internally protected against output
short−circuits, current overload and thermal overload.
The CMPWR280 is housed in a standard, 5−lead TO−263 package
and is available with optional lead−free finishing.
Features
 Selects from 3 Input Voltages and Provides 3.3 V Output
 Automatic Selection of V_CC, V_SBY or V_AUX
 Drive Control Signal for External V_AUX Switch
 Glitch−Free 3.3 V Output During Supply Transitions
 Built−In Hysteresis for Supply Selection
 V_CC Regulates Up to 1.5 A Output Current
 V_SBY Regulates Up to 375 mA Output Current
 Foldback Current Limiting
 Thermal Shutdown with Hysteresis
 Standard 5−lead TO−263 Package
 These Devices are Pb−Free and are RoHS Compliant
Applications
 Peripheral Component Interface (PCI) Adapter Cards
 Network Interface Cards (NICs)
 Multiple Powered Systems
 Systems with Standby Capabilities
http://onsemi.com
TO−263
TO/TN SUFFIX
CASE 418AH
MARKING DIAGRAM
CMPWR280XX
AWLYWWG
1
CMPWR280 = Specific Device Code
XX
= TO/TN
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
G
= Pb−Free Package
ORDERING INFORMATION
Device
CMPWR280TO
CMPWR280TN
Package
TO−263
(Pb−Free)
TO−263
(Pb−Free)
Shipping^†
750/Tape & Reel
750/Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
 Semiconductor Components Industries, LLC, 2011
1
April, 2011 − Rev. 3
Publication Order Number:
CMPWR280/D