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LM3103 Arkusz danych(PDF) 1 Page - Texas Instruments

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Numer części LM3103
Szczegółowy opis  SIMPLE SWITCHER Synchronous 1MHz 0.75A Step-Down Voltage Regulator
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Strona internetowa  http://www.ti.com
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LM3103
www.ti.com
SNVS523F – SEPTEMBER 2007 – REVISED APRIL 2013
LM3103 SIMPLE SWITCHER® Synchronous 1MHz 0.75A
Step-Down Voltage Regulator
Check for Samples: LM3103
1
FEATURES
KEY SPECIFICATIONS
2
Low Component Count and Small Solution
Input Voltage Range 4.5 V to 42 V
Size
0.75 A Output Current
Stable with Ceramic and Other Low ESR
0.6V, ±2% Reference
Capacitors
Integrated Dual N-Channel Main and
No Loop Compensation Required
Synchronous MOSFETs
High Efficiency at a Light Load by DCM
Thermally Enhanced HTSSOP-16 Package
Operation
Pre-bias Startup
DESCRIPTION
The LM3103 Synchronously Rectified Buck Converter
Ultra-Fast Transient Response
features all required functions to implement a highly
Programmable Soft-Start
efficient and cost effective buck regulator. It is
Programmable Switching Frequency up to 1
capable of supplying 0.75A to loads with an output
MHz
voltage as low as 0.6V. Dual N-Channel synchronous
MOSFET switches allow a low component count, thus
Valley Current Limit
reducing complexity and minimizing board size.
Thermal Shutdown
Different from most other COT regulators, the
Output Over-Voltage Protection
LM3103 does not rely on output capacitor ESR for
Precision Internal Reference for an Adjustable
stability, and is designed to work exceptionally well
Output Voltage Down to 0.6V
with
ceramic
and
other
very
low
ESR
output
capacitors. It requires no loop compensation, results
TYPICAL APPLICATIONS
in a fast load transient response and simple circuit
implementation. The operating frequency remains
5VDC, 12VDC, 24VDC, 12VAC, and 24VAC
nearly constant with line variations due to the inverse
Systems
relationship between the input voltage and the on-
Embedded Systems
time. The operating frequency can be externally
Industrial Control
programmed up to 1 MHz. Protection features include
VCC under-voltage lock-out, output over-voltage
Automotive Telematics and Body Electronics
protection, thermal shutdown, and gate drive under-
Point of Load Regulators
voltage lock-out. The LM3103 is available in the
Storage Systems
thermally enhanced HTSSOP-16 package.
Broadband Infrastructure
Direct Conversion from 2/3/4 Cell Lithium
Batteries Systems
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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