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LM3075MTCX Datasheet

  • LM3075MTCX

  • High Efficiency, Synchronous Current Mode Buck Controller

  • 18頁(yè)

  • NSC

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LM3075 High Efficiency, Synchronous Current Mode Buck Controller
September 2005
LM3075
High Efficiency, Synchronous Current Mode Buck
Controller
General Description
The LM3075 is a current mode control, synchronous buck
controller IC. Use of synchronous rectification and pulse-
skipping operation at light load achieves high efficiency over
a wide load range. Fixed frequency operation can be ob-
tained by disabling the pulse-skipping mode. Current mode
control assures excellent line and load regulation and a wide
loop bandwidth for fast response to load transients.
Current mode control can be achieved by either sensing
across the high side NFET or a sense resistor. The switching
frequency can be selected as either 200 kHz or 300 kHz
from an internal clock.
The LM3075 is available with an adjustable output in a
TSSOP-20 package.
Features
n
n
n
n
n
Input voltage range of 4.5V-36V
Current Mode Control
Skip mode operation available
Cycle by cycle current limit
1.24V
鹵
2% Reference
Applications
n
Automotive Power Supplies
n
Distributed Power Systems
Typical Application Circuit
20162301
漏 2005 National Semiconductor Corporation
DS201623
www.national.com

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