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LM22677 Folha de dados(PDF) 1 Page - Texas Instruments

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Nome de Peças LM22677
Descrição Electrónicos  LM22677/-Q1 42-V, 5-A SIMPLE SWITCHER짰, Step-Down Voltage Regulator With Features
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

LM22677 Folha de dados(HTML) 1 Page - Texas Instruments

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LM22677-ADJ
VIN
EN
SW
BOOT
FB
GND
VIN
VOUT
RT/SYNC
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Design
LM22677, LM22677-Q1
SNVS582O – SEPTEMBER 2008 – REVISED AUGUST 2015
LM22677/-Q1 42-V, 5-A SIMPLE SWITCHER®, Step-Down Voltage Regulator
With Features
1 Features
3 Description
The LM22677 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 that
100-m
Ω N-Channel MOSFET
can provide up to 5 A of load current. Excellent line
Output Voltage Options:
and load regulation along with high efficiency (> 90%)
-ADJ (Outputs as Low as 1.285 V)
are featured. Voltage mode control offers short
minimum on-time, allowing the widest ratio between
-5.0 (Output Fixed to 5 V)
input and output voltages. Internal loop compensation
±1.5% Feedback Reference Accuracy
means that the user is free from the tedious task of
500-kHz Default Switching Frequency
calculating the loop compensation components. Fixed
Adjustable Switching Frequency and
5-V output and adjustable output voltage options are
available. The default switching frequency is set at
Synchronization
500 kHz, thus allowing for small external components
–40°C to +125°C Operating Junction Temperature
and
good
transient
response.
In
addition,
the
Range
frequency can be adjusted over a range of 200 kHz
Precision Enable Input
to 1 MHz with a single external resistor. The internal
Integrated Boot-Strap Diode
oscillator can be synchronized to a system clock or to
the oscillator of another regulator. A precision enable
Integrated Soft-Start
input allows simplification of regulator control and
Fully WEBENCH® Enabled
system power sequencing. In shutdown mode the
LM22677-Q1 is an Automotive-Grade Product
regulator draws only 25 µA (typical). The LM22677
that is AEC-Q100 Grade 1 Qualified (–40°C to
also has built-in thermal shutdown, and current
limiting to protect against accidental overloads.
+125°C Operating Junction Temperature)
NDR (Exposed Pad)
The
LM22677
device
is
a
member
of
Texas
Instruments'
SIMPLE
SWITCHER®
family.
The
2 Applications
SIMPLE SWITCHER concept provides for an easy-to-
use complete design using a minimum number of
Industrial Control
external components and the TI WEBENCH design
Telecom and Datacom Systems
tool. TI's WEBENCH tool includes features such as
external component calculation, electrical simulation,
Embedded Systems
thermal simulation, and Build-It boards for easy
Conversions from Standard 24-V, 12-V and 5-V
design-in.
Input Rails
Device Information(1)
Simplified Application Schematic
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM22677
TO-263 (7)
10.16 mm x 9.85 mm
LM22677-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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