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LM22671

現行

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

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產品規格表

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open-in-new 比較替代產品
功能相同，但針腳輸出與所比較的裝置不同。
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.
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.
LMR54406 現行 4V 至 36V、0.6A、80µA Iq 同步降壓 SIMPLE SWITCHER® 電源轉換器 Smaller footprint, lower quiescent current, FPWM and PFM options.

LM22671

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 1.285 Features Enable, Frequency synchronization, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034 Duty cycle (max) (%) 90
Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 1.285 Features Enable, Frequency synchronization, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034 Duty cycle (max) (%) 90
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features datasheet (Rev. N) PDF | HTML 2014/11/5
應用說明 SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B) PDF | HTML 2024/10/9
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
應用說明 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014/9/12
應用說明 AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 2013/5/6
應用說明 AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) 2013/5/6
應用說明 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013/4/23
應用說明 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013/4/23
應用說明 AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C) 2013/4/23
應用說明 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013/4/23
應用說明 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013/4/23
應用說明 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013/4/23
應用說明 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013/4/23
應用說明 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013/4/23
應用說明 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
設計指南 SIMPLE SWITCHER® Design Guide 2011/4/11
應用說明 Input and Output Capacitor Selection 2005/9/19
更多文件說明 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005/7/12
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3

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 模型
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模擬型號

LM22671-5.0 PSpice Transient Model

SNVM234.ZIP (188 KB) - PSpice 模型
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模擬型號

LM22671-5.0 Unencrypted PSpice Average Model

SNVM816.ZIP (1 KB) - PSpice 模型
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模擬型號

LM22671-5.0 Unencrypted PSpice Transient Model

SNVM815.ZIP (4 KB) - PSpice 模型
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模擬型號

LM22671-ADJ PSpice Average Model

SNVM278.ZIP (51 KB) - PSpice 模型
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模擬型號

LM22671-ADJ PSpice Transient Model

SNVM277.ZIP (192 KB) - PSpice 模型
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模擬型號

LM22671-ADJ Unencrypted PSpice Average Model

SNVM813.ZIP (1 KB) - PSpice 模型
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模擬型號

LM22671-ADJ Unencrypted PSpice Transient Model

SNVM814.ZIP (4 KB) - PSpice 模型
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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

TIDA-00138 參考設計是高速序列攝影機介面，可將遠端車用攝影機模組連接至顯示器或機器視覺處理系統。其使用 TI 的 FPD-Link III SerDes 技術，透過雙絞線纜線傳輸未經壓縮的視訊資料和雙向控制訊號。  應用範例包括倒車攝影機、後視攝影機、環景系統、環景監視器、攝影機式停車輔助系統、取代後視鏡、盲點偵測。此設計整合了 DS90UB901Q-Q1 和 DS90UB902Q-Q1 裝置來建立解決方案。

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