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LM22672 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce LM22672
Description  SIMPLE SWITCHER짰 Step-Down Voltage Regulator with Features
Download  30 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM22672 Fiches technique(HTML) 1 Page - Texas Instruments

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LM22672, LM22672-Q1
SNVS588M – SEPTEMBER 2008 – REVISED NOVEMBER 2014
LM22672/-Q1 42-V, 1-A SIMPLE SWITCHER® Step-Down Voltage Regulator
with Features
1 Features
3 Description
The LM22672 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 1 A 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.
–40°C to 125°C Junction Temperature Range
The default switching frequency is set at 500 kHz
Precision Enable Input
allowing for small external components and good
Integrated Boot-Strap Diode
transient response. In addition, the frequency can be
adjusted over a range of 200 kHz to 1 MHz with a
Adjustable Soft-Start
single external resistor. The internal oscillator can be
Fully WEBENCH® Enabled
synchronized to a system clock or to the oscillator of
LM22672-Q1 is an Automotive Grade Product
another regulator. A precision enable input allows
that is AEC-Q100 Grade 1 Qualified (–40°C to
simplification of regulator control and system power
+125°C Junction Temperature)
sequencing. In shutdown mode the regulator draws
only 25 µA (typ). An adjustable soft-start feature is
SO PowerPAD (Exposed Pad)
provided through the selection of a single external
capacitor. The LM22672 also has built in thermal
2 Applications
shutdown, and current limiting to protect against
Industrial Control
accidental overloads.
Telecom and Datacom Systems
The LM22672 is a member of Texas Instruments'
Embedded Systems
SIMPLE
SWITCHER®
family.
The
SIMPLE
SWITCHER® concept provides for an easy to use
Conversions from Standard 24 V, 12 V and 5 V
complete design using a minimum number of external
Input Rails
components and the TI WEBENCH® design tool. TI's
WEBENCH® tool includes features such as external
Simplified Application Schematic
component calculation, electrical simulation, thermal
simulation, and Build-It boards for easy design-in.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM22672,
HSOP (8)
4.89 mm x 3.90 mm
LM22672-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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