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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM22671

現行

具可調整頻率的 SIMPLE SWITCHER® 4.5V 至 42V、500mA 降壓穩壓器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
LMR54406 現行 具有 4-V 至 36-V、0.6-A 同步降壓和 80-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 Smaller footprint, lower quiescent current, FPWM and PFM options.
TLVM13620 現行 採用 4-mm x 6-mm x 1.8-mm 封裝的 3.6-V 至 36-V 輸入、1-V 至 6-V 輸出、2-A 降壓模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.
TPSM560R6H 現行 採用 5-mm x 5.5-mm x 4-mm QFN 封裝的 4.2-V 至 60-V 輸入、1-V 至 16-V 輸出、0.6-A 降壓模組 Smaller design with an integrated-inductor power module.

LM22671

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Iq (typ) (µA) 3400 Duty cycle (max) (%) 90
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.5 Vin (min) (V) 4.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.285 Vout (max) (V) 37 Iq (typ) (µA) 3400 Duty cycle (max) (%) 90
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
  • 500 kHz Default Switching Frequency
  • Adjustable Switching Frequency and Synchronization
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22671-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
  • 500 kHz Default Switching Frequency
  • Adjustable Switching Frequency and Synchronization
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22671-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 LM22671 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. The default switching frequency is set at 500 kHz allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22671 device also has built-in thermal shutdown and current limiting to protect against accidental overloads.

The LM22671 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 LM22671 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. The default switching frequency is set at 500 kHz allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22671 device also has built-in thermal shutdown and current limiting to protect against accidental overloads.

The LM22671 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 LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. N) PDF | HTML 2014年 11月 5日
Application note SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B) PDF | HTML 2024年 10月 9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
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
EVM User's guide AN-1895 LM22671 Evaluation Board (Rev. D) 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
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

設計與開發

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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

LM22671-5.0 PSpice Average Model

SNVM233.ZIP (51 KB) - PSpice Model
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模擬型號

LM22671-5.0 PSpice Transient Model

SNVM234.ZIP (188 KB) - PSpice Model
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模擬型號

LM22671-5.0 Unencrypted PSpice Average Model

SNVM816.ZIP (1 KB) - PSpice Model
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模擬型號

LM22671-5.0 Unencrypted PSpice Transient Model

SNVM815.ZIP (4 KB) - PSpice Model
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模擬型號

LM22671-ADJ PSpice Average Model

SNVM278.ZIP (51 KB) - PSpice Model
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模擬型號

LM22671-ADJ PSpice Transient Model

SNVM277.ZIP (192 KB) - PSpice Model
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模擬型號

LM22671-ADJ Unencrypted PSpice Average Model

SNVM813.ZIP (1 KB) - PSpice Model
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模擬型號

LM22671-ADJ Unencrypted PSpice Transient Model

SNVM814.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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參考設計

TIDA-00138 — 適用車用攝影機系統的雙絞線未壓縮數位視訊 SerDes

The TIDA-00138 reference design is a high speed serial camera interface to connect a remote automotive camera module to a display or machine  vision processing system. It uses TIs FPD-Link III SerDes technology to transmit uncompressed video data and bidirectional control signals over a twisted (...)
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
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