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LM22671MR-ADJ Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce LM22671MR-ADJ
Description  LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER짰 Step-Down Voltage Regulator
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM22671MR-ADJ Fiches technique(HTML) 1 Page - Texas Instruments

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LM22671
www.ti.com
SNVS589M – SEPTEMBER 2008 – REVISED APRIL 2013
LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER® Step-Down Voltage Regulator
with Features
Check for Samples: LM22671
1
FEATURES
DESCRIPTION
The LM22671 switching regulator provides all of the
2
Wide Input Voltage Range: 4.5V to 42V
functions necessary to implement an efficient high
Internally Compensated Voltage Mode Control
voltage step-down (buck) regulator using a minimum
Stable with Low ESR Ceramic capacitors
of external components. This easy to use regulator
incorporates
a
42V
N-channel
MOSFET
switch
200 m
Ω N-Channel MOSFET
capable of providing up to 500mA of load current.
Output Voltage Options:
Excellent line and load regulation along with high
ADJ (Outputs as Low as 1.285V)
efficiency (>90%) are featured. Voltage mode control
offers short minimum on-time, allowing the widest
5.0 (Output Fixed to 5V)
ratio between input and output voltages. Internal loop
±1.5% Feedback Reference Accuracy
compensation means that the user is free from the
500 kHz Default Switching Frequency
tedious task of calculating the loop compensation
components. Fixed 5V output and adjustable output
Adjustable Switching Frequency and
voltage options are available. The default switching
Synchronization
frequency is set at 500 kHz allowing for small
–40°C to 125°C Operating Junction
external components and good transient response. In
Temperature Range
addition, the frequency can be adjusted over a range
Precision Enable Pin
of 200 kHz to 1MHz with a single external resistor.
The internal oscillator can be synchronized to a
Integrated Boot-Strap Diode
system clock or to the oscillator of another regulator.
Adjustable Soft-Start
A precision enable input allows simplification of
Fully WEBENCH® Enabled
regulator control and system power sequencing. In
shutdown mode the regulator draws only 25 µA (typ.).
LM22671-Q1 is an Automotive Grade Product
An adjustable soft-start feature is provided through
that is AEC-Q100 Grade 1 Qualified (-40°C to
the selection of a single external capacitor. The
+125°C Operating Junction Temperature)
LM22671 also has built in thermal shutdown, and
current
limiting
to
protect
against
accidental
PACKAGE
overloads.
SO PowerPAD (Exposed Pad)
The LM22671 is a member of Texas Instruments'
SIMPLE
SWITCHER™
family.
The
SIMPLE
APPLICATIONS
SWITCHER™ concept provides for an easy to use
complete design using a minimum number of external
Industrial Control
components and the TI WEBENCH® design tool. TI's
Telecom and Datacom Systems
WEBENCH® tool includes features such as external
Embedded Systems
component calculation, electrical simulation, thermal
Conversions from Standard 24V, 12V and 5V
simulation, and Build-It boards for easy design-in.
Input Rails
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 © 2008–2013, 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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