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LM2673S-12 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM2673S-12
Descripción Electrónicos  LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

LM2673S-12 Datasheet(HTML) 1 Page - Texas Instruments

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=
37,125
RADJ
I
CL
Voltage
5V/3A
COUT
180 PF/16V
33 PH
L
Feedback
Boost
SR305
Ground
Current
VIN
Softstart
1 nF
Voltage
8V to 40V
Input
LM2673 - 5.0
Output
Switch
Output
0.01 PF
+
Limit
Adjust
8.2k
0.47 PF
+
+
CIN
2 x 15 PF/50V
LM2673
www.ti.com
SNVS030N – APRIL 2000 – REVISED APRIL 2013
LM2673 SIMPLE SWITCHER® 3A Step-Down Voltage Regulator with Adjustable Current
Limit
Check for Samples: LM2673
1
FEATURES
DESCRIPTION
The LM2673 series of regulators are monolithic
23
Efficiency Up to 94%
integrated circuits which provide all of the active
Simple and Easy to Design with (Using Off-
functions for a step-down (buck) switching regulator
The-Shelf External Components)
capable of driving up to 3A loads with excellent line
Resistor Programmable Peak Current Limit
and load regulation characteristics. High efficiency
(>90%) is obtained through the use of a low ON-
Over a Range of 2A to 5A
resistance DMOS power switch. The series consists
150 m
Ω DMOS Output Switch
of fixed output voltages of 3.3V, 5V and 12V and an
3.3V, 5V and 12V Fixed Output and Adjustable
adjustable output version.
(1.2V to 37V) Versions
The SIMPLE SWITCHER® concept provides for a
±2% Maximum Output Tolerance Over Full
complete design using a minimum number of external
Line and Load Conditions
components.
A
high
fixed
frequency
oscillator
Wide Input Voltage Range: 8V to 40V
(260KHz) allows the use of physically smaller sized
components. A family of standard inductors for use
260 KHz Fixed Frequency Internal Oscillator
with
the
LM2673
are
available
from
several
Softstart Capability
manufacturers to greatly simplify the design process.
−40 to +125°C Operating Junction Temperature
Other features include the ability to reduce the input
Range
surge current at power-ON by adding a softstart
timing capacitor to gradually turn on the regulator.
APPLICATIONS
The
LM2673
series
also
has
built
in
thermal
shutdown and resistor programmable current limit of
Simple to Design, High Efficiency (>90%) Step-
the power MOSFET switch to protect the device and
Down Switching Regulators
load circuitry under fault conditions. The output
Efficient System Pre-Regulator for Linear
voltage is ensured to a ±2% tolerance. The clock
Voltage Regulators
frequency is controlled to within a ±11% tolerance.
Battery Chargers
Typical Application
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
SIMPLE SWITCHER, Switchers Made Simple are registered trademarks of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, 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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