Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 1.285 Vout (Max) (V) 37 Iout (Max) (A) 1 Iq (Typ) (uA) 3400 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 1.285 Vout (Max) (V) 37 Iout (Max) (A) 1 Iq (Typ) (uA) 3400 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Wide Input Voltage Range: 4.5 V to 42 V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200 mΩ N-Channel MOSFET
  • Output Voltage Options:
    -ADJ (Outputs as Low as 1.285 V)
    -5.0 (Output Fixed to 5 V)
  • ±1.5% Feedback Reference Accuracy
  • Switching Frequency of 500 kHz
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Integrated Soft-Start
  • Fully WEBENCH® Enabled
  • Step-Down and Inverting Buck-Boost Applications
  • LM22675Q is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
    Operating Junction Temperature)
  • SO PowerPAD-8 (Exposed Pad) Package
  • Wide Input Voltage Range: 4.5 V to 42 V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200 mΩ N-Channel MOSFET
  • Output Voltage Options:
    -ADJ (Outputs as Low as 1.285 V)
    -5.0 (Output Fixed to 5 V)
  • ±1.5% Feedback Reference Accuracy
  • Switching Frequency of 500 kHz
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Integrated Soft-Start
  • Fully WEBENCH® Enabled
  • Step-Down and Inverting Buck-Boost Applications
  • LM22675Q is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
    Operating Junction Temperature)
  • SO PowerPAD-8 (Exposed Pad) Package

The LM22675 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 incorporates a 42 V N-channel MOSFET switch capable of providing up to 1 A 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 5 V 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 (500 µs, typ) saves external components. The LM22675 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22675 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.

The LM22675 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 incorporates a 42 V N-channel MOSFET switch capable of providing up to 1 A 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 5 V 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 (500 µs, typ) saves external components. The LM22675 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22675 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.

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Technical documentation

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Type Title Date
* Data sheet LM22675/-Q1 42 V, 1 A SIMPLE SWITCHER Step-Down Voltage Regulator with Features datasheet (Rev. L) 04 Nov 2014
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Quantifying the value of wide VIN 15 Jun 2016
Technical article DC/DC converter datasheets – System losses demystified 25 Apr 2016
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) 19 Apr 2016
Technical article DC/DC converter datasheets – System efficiency demystified 18 Apr 2016
Application note Know Your Limits 02 Jun 2015
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) 06 May 2013
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 06 May 2013
Application note AN-1797 TO-263 THIN Package (Rev. A) 24 Apr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. A) 23 Apr 2013
Design guide SIMPLE SWITCHER® Design Guide 11 Apr 2011
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

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Simulation model

LM22675-5.0 PSpice Average Model

SNVM104.ZIP (51 KB) - PSpice Model
Simulation model

LM22675-5.0 PSpice Transient Model

SNVM115.ZIP (204 KB) - PSpice Model
Simulation model

LM22675-5.0 TINA-TI Load Transient Reference Design

SNVM123.TSC (183 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 TINA-TI Startup Transient Reference Design

SNVM124.TSC (216 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 TINA-TI Transient Spice Model

SNVM125.ZIP (20 KB) - TINA-TI Spice Model
Simulation model

LM22675-5.0 TINA-TI Steady State Transient Reference Design

SNVM126.TSC (225 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 TINA-TI Line Transient Reference Design

SNVM127.TSC (189 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 TINA-TI Average Reference Design

SNVM128.TSC (141 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 TINA-TI Average Spice Model

SNVM129.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

LM22675-ADJ PSpice Transient Model

SNVM281.ZIP (166 KB) - PSpice Model
Simulation model

LM22675-ADJ PSpice Average Model

SNVM282.ZIP (55 KB) - PSpice Model
Simulation model

LM22675 TINA-TI Transient Spice Model

SNVM622.ZIP (21 KB) - TINA-TI Spice Model
Simulation model

LM22675 TINA-TI Transient Reference Design

SNVM623.ZIP (401 KB) - TINA-TI Reference Design
Simulation model

LM22675-5.0 Unencrypted PSpice Average Model

SNVM928.ZIP (1 KB) - PSpice Model
Simulation model

LM22675-ADJ Unencrypted PSpice Transient Model

SNVM929.ZIP (4 KB) - PSpice Model
Simulation model

LM22675-5.0 Unencrypted PSpice Transient Model

SNVM930.ZIP (4 KB) - PSpice Model
Simulation model

LM22675-ADJ Unencrypted PSpice Average Model

SNVM931.ZIP (1 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Calculation tool

LM2267X-22680DESIGN-CALC — LM2267x, LM22680 Quick Start Simple Switcher Component Calculator

Package Pins Download
SO PowerPAD (DDA) 8 View options

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