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LM25010MHX 데이터시트(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM25010MHX
상세설명  42V, 1.0A Step-Down Switching Regulator
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
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LM25010
42V, 1.0A Step-Down Switching Regulator
General Description
The LM25010 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 inte-
grates an N-Channel Buck Switch, and is available in ther-
mally enhanced LLP-10 and TSSOP-14EP packages. The
constant on-time regulation scheme requires no loop com-
pensation resulting in fast load transient response and sim-
plified circuit implementation. The operating frequency re-
mains 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. Addi-
tional features include: VCC under-voltage lock-out, thermal
shutdown, gate drive under-voltage lock-out, and maximum
duty cycle limiter.
Features
n
Wide 6V to 42V Input Voltage Range
n
Valley Current Limiting At 1.25A
n
Programmable Switching Frequency Up To 1 MHz
n
Integrated N-Channel Buck Switch
n
Integrated High Voltage Bias Regulator
n
No Loop Compensation Required
n
Ultra-Fast Transient Response
n
Nearly Constant Operating Frequency With Line and
Load Variations
n
Adjustable Output Voltage
n
2.5V, ±2% Feedback Reference
n
Programmable Soft-Start
n
Thermal shutdown
Typical Applications
n
Non-Isolated Telecommunications Regulator
n
Secondary Side Post Regulator
n
Power SUpply for Automotive Electronics
Package
n
LLP-10 (4 mmx4mm)
n
TSSOP-14EP
n
Both Packages Have Exposed Thermal Pad For
Improved Heat Dissipation
Basic Step-Down Regulator
20172743
February 2006
© 2006 National Semiconductor Corporation
DS201727
www.national.com


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