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CMPWR280TO PDF预览

CMPWR280TO

更新时间: 2024-01-13 20:29:59
品牌 Logo 应用领域
CALMIRCO 稳压器驱动
页数 文件大小 规格书
10页 266K
描述
1.5A SMARTOR Dual Regulator with V Drive

CMPWR280TO 数据手册

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CALIFORNIA MICRO DEVICES  
CMPWR280  
1.5A SmartORTM Dual Regulator with VAUX Drive  
Features  
• Automatic selection of VCC or VSBY  
Pin Diagram  
• Drive control signal for external VAUX switch  
• Continuous 3.3V output supply  
• Glitch-free output during supply transitions  
• Built-in hysteresis for supply selection  
• VCC regulates up to 1.5A output current  
• VSBY regulates up to 375mA output current  
• Foldback current limiting  
• Thermal shutdown with hysteresis  
• On-chip controller operates from VCC, VSBY or VOUT  
Applications  
• Peripheral Component Interface (PCI) Adapter Cards  
• Network Interface Cards (NIC’s)  
• Multiple Powered Systems  
Typical Application Circuit  
• Systems with Standby Capabilities  
Product Description  
The California Micro Devices’ SmartORTM CMPWR280 is a fully  
protected Dual-Input low dropout CMOS regulator that also  
provides the necessary control signal for driving an external  
auxiliary Pchannel MOSFET switch. The SmartORTM device au-  
tomatically selects one of three possible inputs on a priority  
basis: VCC (1.5A), VSBY (375mA) or VAUX via the drive signal  
used to control an external switch.  
VCC is given first priority. In the event of the VCC supply being  
powered down, the device will automatically deselect the VCC  
prior to regulator dropout and immediately select VSBY (second  
priority) as its power source.  
Simplified Electrical Schematic  
If neither VCC nor VSBY are present the drive control output will  
turn-on an external P-channel MOSFET switch from an auxiliary  
3.3V supply VAUX to VOUT  
.
All the necessary control circuitry needed to provide a smooth  
and automatic transition between all three supplies has been  
incorporated. This allows VCC to be dynamically switched with-  
out loss of output voltage.  
The CMPWR280 is internally protected against output  
short-circuits, current overload and thermal overload.  
S TA N D A R D P A R T O R D E R IN G IN F O R M A TIO N  
Package  
Ordering Part Num ber  
Part Marking  
Pins  
Style  
5
TO263  
CMPWR280TO  
When placing an order please specify desired shipping: Tubes or Tape & Reel.  
C0660200  
© 2000 Calirornia Micro Devices Corp. All rights reserved.  
CMPWR300™ is a trademark of California Micro Devices Corp.  
3/00  
215 Topaz Street, Milpitas, California 95035  
Tel: (408) 263-3214  
Fax: (408) 263-7846  
www.calmicro.com  
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