LM22676
LM22676-Q1
www.ti.com
SNVS587K –SEPTEMBER 2008–REVISED APRIL 2013
LM22676/LM22676-Q1 42V, 3A SIMPLE SWITCHER® Step-Down Voltage Regulator with
Features
Check for Samples: LM22676, LM22676-Q1
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FEATURES
DESCRIPTION
The LM22676 switching regulator provides all of the
functions necessary to implement an efficient high
voltage step-down (buck) regulator using a minimum
of external components. This easy to use regulator
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Wide Input Voltage Range: 4.5V to 42V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
120 mΩ N-Channel MOSFET PFM Package
100 mΩ N-Channel MOSFET PSOP-8 Package
Output Voltage Options:
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incorporates
a 42V N-channel MOSFET switch
capable of providing up to 3A of load current.
Excellent line and load regulation along with high
efficiency (>90%) are featured. Voltage mode control
offers short minimum on-time, allowing the widest
ratio between input and output voltages. Internal loop
compensation means that the user is free from the
tedious task of calculating the loop compensation
components. Fixed 5V output and adjustable output
voltage options are available. A switching frequency
of 500 kHz allows for small external components and
good transient response. A precision enable input
allows simplification of regulator control and system
power sequencing. In shutdown mode the regulator
draws only 25 µA (typ.). Built in soft-start (500µs, typ)
saves external components. The LM22676 also has
built in thermal shutdown, and current limiting to
protect against accidental overloads.
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ADJ (Outputs as Low as 1.285V)
5.0 (Output Fixed to 5V)
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±1.5% Feedback Reference Accuracy
Switching Frequency of 500 kHz
-40°C to 125°C Operating Junction
Temperature Range
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Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH® Enabled
LM22676Q is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (-40°C to
+125°C Operating Junction Temperature)
The LM22676 is a member of Texas Instruments'
SIMPLE SWITCHER™ family. The SIMPLE
SWITCHER™ concept provides for an easy to use
complete design using a minimum number of external
components and the TI WEBENCH® design tool. TI's
WEBENCH® tool includes features such as external
component calculation, electrical simulation, thermal
simulation, and Build-It boards for easy design-in.
PACKAGE
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SO PowerPAD (Exposed Pad
PFM (Exposed Pad)
APPLICATIONS
Simplified Application Schematic
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Industrial Control
Telecom and Datacom Systems
Embedded Systems
VIN
VIN
LM22676-ADJ
FB
BOOT
SW
Conversions from Standard 24V, 12V and 5V
Input Rails
VOUT
EN GND
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PRODUCTION DATA information is current as of publication date.
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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