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AC/DC & DC/DC converters (integrated FET)

LM22674

現行

具精密啓用功能的 4.5V 至 42V、500mA SIMPLE SWITCHER® 降壓轉換器

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LM22674

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 0.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Topology Buck Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034
Iout (max) (A) 0.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Topology Buck Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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
  • LM22674-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified
    (–40°C to +125°C Operating Junction
    Temperature)
  • SO PowerPAD (Exposed Pad)
  • 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
  • LM22674-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified
    (–40°C to +125°C Operating Junction
    Temperature)
  • SO PowerPAD (Exposed Pad)

The LM22674 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 500 mA 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 LM22674 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22674 device 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 LM22674 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 500 mA 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 LM22674 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22674 device 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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類型 標題 日期
* Data sheet LM22674/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. M) PDF | HTML 2014年 11月 4日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Technical article Quantifying the value of wide VIN PDF | HTML 2016年 6月 15日
Technical article DC/DC converter datasheets – System losses demystified PDF | HTML 2016年 4月 25日
Technical article DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016年 4月 18日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) 2013年 5月 6日
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 2013年 5月 6日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
Application note SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. A) 2013年 4月 23日
Design guide SIMPLE SWITCHER® Design Guide 2011年 4月 11日
Application note Input and Output Capacitor Selection 2005年 9月 19日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

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開發板

LM22671EVAL — 具有頻率調整或同步和精密啟用的 LM22671 0.5A SIMPLE SWITCHER 穩壓器 EVM

The LM22671 evaluation board is designed to demonstrate the capabilities of the LM22671switching regulator. The LM22671 evaluation board is configured to provide an output voltage of 3.3V up to 500 mA load current with an input voltage range of 4.5V to 42V. The typical operating frequency is 500 (...)

使用指南: PDF
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模擬型號

LM22674-5.0 PSpice Average Model

SNVM178.ZIP (52 KB) - PSpice Model
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模擬型號

LM22674-5.0 PSpice Transient Model (Rev. A)

SNVM177A.ZIP (209 KB) - PSpice Model
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模擬型號

LM22674-5.0 TINA-TI Average Reference Design

SNVM180.TSC (142 KB) - TINA-TI Reference Design
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模擬型號

LM22674-5.0 TINA-TI Average Spice Model

SNVM179.ZIP (8 KB) - TINA-TI Spice Model
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模擬型號

LM22674-5.0 TINA-TI Transient Line Reference Design

SNVM173.TSC (186 KB) - TINA-TI Reference Design
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模擬型號

LM22674-5.0 TINA-TI Transient Load Reference Design

SNVM172.TSC (184 KB) - TINA-TI Reference Design
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模擬型號

LM22674-5.0 TINA-TI Transient Spice Model

SNVM175.ZIP (20 KB) - TINA-TI Spice Model
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模擬型號

LM22674-5.0 TINA-TI Transient Startup Reference Design

SNVM176.TSC (219 KB) - TINA-TI Reference Design
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模擬型號

LM22674-5.0 TINA-TI Transient Steady State Reference Design

SNVM174.TSC (226 KB) - TINA-TI Reference Design
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模擬型號

LM22674-5.0 Unencrypted PSpice Average Model

SNVM925.ZIP (1 KB) - PSpice Model
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模擬型號

LM22674-5.0 Unencrypted PSpice Transient Model

SNVM926.ZIP (4 KB) - PSpice Model
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模擬型號

LM22674-ADJ PSpice Average Model

SNVM312.ZIP (53 KB) - PSpice Model
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模擬型號

LM22674-ADJ PSpice Transient Model

SNVM313.ZIP (208 KB) - PSpice Model
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模擬型號

LM22674-ADJ Unencrypted PSpice Average Model

SNVM900.ZIP (1 KB) - PSpice Model
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模擬型號

LM22674-ADJ Unencrypted PSpice Transient Model

SNVM899.ZIP (4 KB) - PSpice Model
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計算工具

LM2267X-22680DESIGN-CALC — LM2267x、LM22680 快速入門 Simple Switcher 元件計算機

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HSOIC (DDA) 8 檢視選項
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