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LM3100MHX Datasheet

  • LM3100MHX

  • SIMPLE SWITCHER㈢ Synchronous 1MHz 1.5A Step-Down Voltage Re...

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  • NSC

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LM3100 SIMPLE SWITCHER
廬
Synchronous 1MHz 1.5A Step-Down Voltage Regulator
February 2006
LM3100
SIMPLE SWITCHER
廬
Synchronous 1MHz 1.5A
Step-Down Voltage Regulator
General Description
The LM3100 Synchronously Rectified Buck Converter fea-
tures all functions needed to implement a highly efficient,
cost effective buck regulator capable of supplying 1.5A to
loads with voltages as low as 0.8V. Dual 40V N-Channel
synchronous MOSFET switches allow for low external com-
ponent thus reducing complexity and minimizing board
space. The LM3100 is designed to work exceptionally well
with ceramic and other very low ESR output capacitors. The
Constant ON-Time (COT) regulation scheme requires no
loop compensation, results in fast load transient response,
and simplifies circuit implementation. Through the use of a
unique design the regulator does not rely on output capacitor
ESR for stability, as do most other COT regulators. The
operating frequency remains nearly constant with line and
load variations due to the inverse relationship between the
input voltage and the on-time. The oprating frequency can
be externally programmed up to 1MHz. Protection features
include V
CC
under-voltage lockout, thermal shutdown and
gate drive under-voltage lockout. The part is available in a
thermally enhanced eTSSOP-20 package
Features
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Input voltage range 4.5V - 36V
1.5A output current
0.8V,
鹵
1.5% reference
Integrated 40V, dual N-Channel buck synchronous
switches
Low component count and small solution size
No loop compensation required
Ultra-fast transient response
Stable with ceramic and other low ESR capacitors
Programmable switching frequency up to 1MHz
Max. duty cycle limited during start-up
Valley current limit
Precision Internal Reference for adjustable output
voltage down to 0.8V
Thermal shutdown
Thermally enhanced eTSSOP-20 package
Typical Applications
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5VDC, 12VDC, 24VDC, 12VAC, and 24VAC systems
Embedded Systems
Industrial Controls
Automotive Telematics and Body Electronics
Point of Load Regulators
Storage Systems
Broadband Infrastructure
Direct Conversion from 2/3/4 Cell Lithium Batteries
Systems
Typical Application
20174702
SIMPLE SWITCHER
廬
is a registered trademark of National Semiconductor Corporation
漏 2006 National Semiconductor Corporation
DS201747
www.national.com

LM3100MHX 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 0.8 V to 7 V

  • 1.5 A

  • 1000 KHz

  • SMD/SMT

  • TSSOP EP

  • Reel

  • 1

  • 2500

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