Datasheet
LM22676-ADJ
VIN
EN
SW
BOOT
FB
GND
VIN
VOUT
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
1
FEATURES
DESCRIPTION
The LM22676 switching regulator provides all of the
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• 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
• 120 mΩ N-Channel MOSFET PFM Package
capable of providing up to 3A of load current.
• 100 mΩ N-Channel MOSFET PSOP-8 Package
Excellent line and load regulation along with high
• Output Voltage Options:
efficiency (>90%) are featured. Voltage mode control
offers short minimum on-time, allowing the widest
– ADJ (Outputs as Low as 1.285V)
ratio between input and output voltages. Internal loop
– 5.0 (Output Fixed to 5V)
compensation means that the user is free from the
• ±1.5% Feedback Reference Accuracy
tedious task of calculating the loop compensation
components. Fixed 5V output and adjustable output
• Switching Frequency of 500 kHz
voltage options are available. A switching frequency
• -40°C to 125°C Operating Junction
of 500 kHz allows for small external components and
Temperature Range
good transient response. A precision enable input
• Precision Enable Pin
allows simplification of regulator control and system
power sequencing. In shutdown mode the regulator
• Integrated Boot-Strap Diode
draws only 25 µA (typ.). Built in soft-start (500µs, typ)
• Integrated Soft-Start
saves external components. The LM22676 also has
• Fully WEBENCH
®
Enabled
built in thermal shutdown, and current limiting to
• LM22676Q is an Automotive Grade Product
protect against accidental overloads.
that is AEC-Q100 Grade 1 Qualified (-40°C to
The LM22676 is a member of Texas Instruments'
+125°C Operating Junction Temperature)
SIMPLE SWITCHER™ family. The SIMPLE
SWITCHER™ concept provides for an easy to use
PACKAGE
complete design using a minimum number of external
components and the TI WEBENCH
®
design tool. TI's
• SO PowerPAD (Exposed Pad
WEBENCH
®
tool includes features such as external
• PFM (Exposed Pad)
component calculation, electrical simulation, thermal
simulation, and Build-It boards for easy design-in.
APPLICATIONS
Simplified Application Schematic
• Industrial Control
• Telecom and Datacom Systems
• Embedded Systems
• Conversions from Standard 24V, 12V and 5V
Input Rails
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All 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.