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LM22671 Datenblatt(PDF) 1 Page - Texas Instruments

Teilenummer LM22671
Bauteilbeschribung  LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER짰 Step-Down Voltage Regulator with Features
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

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LM22671, LM22671-Q1
SNVS589N – SEPTEMBER 2008 – REVISED NOVEMBER 2014
LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator
with Features
1 Features
3 Description
The LM22671 switching regulator provides all of the
1
Wide Input Voltage Range: 4.5 V to 42 V
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 42 V N-channel MOSFET switch
200 m
Ω N-Channel MOSFET
capable of providing up to 500 mA of load current.
Output Voltage Options:
Excellent line and load regulation along with high
-ADJ (Outputs as Low as 1.285 V)
efficiency (> 90%) are featured. Voltage mode control
-5.0 (Output Fixed to 5 V)
offers short minimum on-time, allowing the widest
±1.5% Feedback Reference Accuracy
ratio between input and output voltages. Internal loop
compensation means that the user is free from the
500 kHz Default Switching Frequency
tedious task of calculating the loop compensation
Adjustable Switching Frequency and
components. Fixed 5 V output and adjustable output
Synchronization
voltage options are available. The default switching
–40°C to 125°C Operating Junction
frequency is set at 500 kHz allowing for small
Temperature Range
external components and good transient response. In
addition, the frequency can be adjusted over a range
Precision Enable Pin
of 200 kHz to 1 MHz with a single external resistor.
Integrated Boot-Strap Diode
The internal oscillator can be synchronized to a
Adjustable Soft-Start
system clock or to the oscillator of another regulator.
A precision enable input allows simplification of
Fully WEBENCH® Enabled
regulator control and system power sequencing. In
LM22671-Q1 is an Automotive Grade Product
shutdown mode the regulator draws only 25 µA (typ).
that is AEC-Q100 Grade 1 Qualified (–40°C to
An adjustable soft-start feature is provided through
+125°C Operating Junction Temperature)
the selection of a single external capacitor. The
SO PowerPAD™ (Exposed Pad)
LM22671 device also has built-in thermal shutdown
and current limiting to protect against accidental
overloads.
2 Applications
Industrial Control
The
LM22671
device
is
a
member
of
Texas
Instruments'
SIMPLE
SWITCHER®
family.
The
Telecom and Datacom Systems
SIMPLE SWITCHER concept provides for an easy to
Embedded Systems
use complete design using a minimum number of
Conversions from Standard 24 V, 12 V and 5 V
external components and the TI WEBENCH design
Input Rails
tool. TI's WEBENCH tool includes features such as
external component calculation, electrical simulation,
Simplified Application Schematic
thermal simulation, and Build-It boards for easy
design-in.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM22671
HSOP (8)
4.89 mm x 3.90 mm
LM22671-Q1
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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