LM22675

ACTIVE

4.5V to 42V, 1A SIMPLE SWITCHER® buck converter with precision enable

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 1.285 Vout (Max) (V) 37 Iout (Max) (A) 1 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Over Current Protection Control mode Voltage Mode Duty cycle (Max) (%) 90 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)

Features

  • 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
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Description

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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LMR33610 ACTIVE SIMPLE SWITCHER® 3.8-V to 36-V, 1-A synchronous step-down converter in SOIC-8 package Next-generation 3.8-V to 36-V, 1-A synchronous step-down converter in SOIC-8 package.

Technical documentation

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

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$25.00
Description

The LM22672 evaluation board is designed to demonstrate the capabilities of the LM22672 switching regulator. The LM22672 evaluation board is configured to provide an output voltage of 3.3V up to 1A load current with an input voltage range of 4.5V to 42V. Due to the low RDS(ON) of the integrated (...)

Features
  • Input Range: 4.5V to 42V
  • Output Voltage: 3.3V
  • Output Current Range: 0A to 1A
  • Frequency of Operation: 500 kHz
  • Board Size: 1.5 X 1.5 inches
  • Package: PSOP-8

At low input voltages between 4.5V and 6V, a minimum load of approximately 5 mA may be required to reach a regulated 3.3V output voltage. To aid in the (...)

DEVELOPMENT KITS Download
document-generic User guide
$699.00
Description

The K2G Evaluation Module (EVM) enables developers to immediately start evaluating the 66AK2Gx - 600MHz processor, and to accelerate the development of audio, industrial motor control, smart grid protection and other high reliability, real-time compute intensive applications.  Similar to (...)

Features
  • 66AK2G02 C66x DSP+ARM A15 Processor at 600MHz
  • 2-GByte DDR3L with ECC
  • TPS659118 PMIC
  • Audio and Serial expansion headers
  • Processor SDK Linux and TI-RTOS support
  • Supports Gigabit Ethernet
DEVELOPMENT KITS Download
document-generic User guide
$699.00
Description

The EVMK2GX (also known as "K2G") 1GHz Evaluation Module (EVM) enables developers to immediately start evaluating the 66AK2Gx processor family, and to accelerate the development of audio, industrial motor control, smart grid protection and other high reliability, real-time compute intensive (...)

Features
  • 66AK2G12 C66x DSP+ARM A15 Processor at 1GHz
  • 2-GByte DDR3L with ECC
  • TPS65911A PMIC
  • Audio and serial expansion headers
  • Processor SDK Linux and TI-RTOS support
DEVELOPMENT KITS Download
document-generic User guide
$1,049.00
Description

The K2G 1GHz High Secure Evaluation Module (EVM) enables developers to start  evaluating and testing the programming of the  high secure developmental version of the  66AK2Gx processor, and to accelerate the next stage of secure boot product development of audio and industrial real (...)

Features
  • 66AK2G12 C66x DSP+ARM A15 Processor at 1GHz
  • 2-GByte DDR3L with ECC
  • TPS65911A PMIC
  • Audio and serial expansion headers
  • Processor SDK Linux and TI-RTOS support

Design tools & simulation

SIMULATION MODELS Download
SNVM104.ZIP (51 KB) - PSpice Model
SIMULATION MODELS Download
SNVM115.ZIP (204 KB) - PSpice Model
SIMULATION MODELS Download
SNVM123.TSC (183 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM124.TSC (216 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM125.ZIP (20 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM126.TSC (225 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM127.TSC (189 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM128.TSC (141 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM129.ZIP (7 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM281.ZIP (166 KB) - PSpice Model
SIMULATION MODELS Download
SNVM282.ZIP (55 KB) - PSpice Model
SIMULATION MODELS Download
SNVM622.ZIP (21 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM623.ZIP (401 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM928.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVM929.ZIP (4 KB) - PSpice Model
SIMULATION MODELS Download
SNVM930.ZIP (4 KB) - PSpice Model
SIMULATION MODELS Download
SNVM931.ZIP (1 KB) - PSpice Model
CALCULATION TOOLS Download

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

Support & training

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