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LM5010AHMH Datasheet

  • LM5010AHMH

  • National Semiconductor [High Voltage 1A Step Down Switching...

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LM5010A High Voltage 1A Step Down Switching Regulator
October 2005
LM5010A
High Voltage 1A Step Down Switching Regulator
General Description
The LM5010A Step Down Switching Regulator is an en-
hanced version of the LM5010 with the input operating range
extended to 6V minimum. The LM5010A features all the
functions needed to implement a low cost, efficient, buck
regulator capable of supplying in excess of 1A load current.
This high voltage regulator integrates an N-Channel Buck
Switch, and is available in thermally enhanced LLP-10 and
TSSOP-14EP packages. The constant on-time regulation
scheme requires no loop compensation resulting in fast load
transient response and simplified circuit implementation. The
operating frequency remains constant with line and load
variations due to the inverse relationship between the input
voltage and the on-time. The valley current limit detection is
set at 1.25A. Additional features include: VCC under-voltage
lock-out, thermal shutdown, gate drive under-voltage lock-
out, and maximum duty cycle limiter.
Features
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Wide 6V to 75V Input Voltage Range
Valley Current Limiting At 1.25A
Programmable Switching Frequency Up To 1 MHz
Integrated 80V N-Channel Buck Switch
Integrated High Voltage Bias Regulator
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency With Line and
Load Variations
Adjustable Output Voltage
2.5V,
卤
2% Feedback Reference
Programmable Soft-Start
Thermal shutdown
Typical Applications
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Non-Isolated Telecommunications Regulator
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Secondary Side Post Regulator
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Power SUpply for Automotive Electronics
Package
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LLP-10 (4 mm x 4 mm)
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TSSOP-14EP
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Both Packages Have Exposed Thermal Pad For
Improved Heat Dissipation
Basic Step Down Regulator
20153843
漏 2005 National Semiconductor Corporation
DS201538
www.national.com

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