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LM22678-Q1

現行

5A SIMPLE SWITCHER，具備精密啟用功能的降壓型電壓穩壓器

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，但針腳輸出與所比較的裝置不同。
LM63460-Q1 現行 採用強化式 QFN 封裝的車用 3-V 至 36-V、6-A、低 EMI 同步降壓轉換器 Smaller device footprint, enhanced HotRod™ QFN package, spread spectrum and selectable FPWM or PFM modes.

LM22678-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck Iout (max) (A) 5 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 1.285 Features Enable, Over Current Protection, Soft Start Fixed Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034 Duty cycle (max) (%) 90
Rating Automotive Topology Buck Iout (max) (A) 5 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 1.285 Features Enable, Over Current Protection, Soft Start Fixed Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0034 Duty cycle (max) (%) 90
TO-263 (NDR) 7 142.3416 mm² (10.16 mm × 14.01 mm)
  • New product available: LM61460 3-V to 36-V, 6-A low EMI synchronous converter
  • Wide input voltage range: 4.5 V to 42 V
  • Internally compensated voltage mode control
  • Stable with low-ESR ceramic capacitors
  • 100-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 bootstrap diode
  • Integrated soft start
  • Fully WEBENCH enabled
  • LM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)
  • PFM (exposed pad) package
  • New product available: LM61460 3-V to 36-V, 6-A low EMI synchronous converter
  • Wide input voltage range: 4.5 V to 42 V
  • Internally compensated voltage mode control
  • Stable with low-ESR ceramic capacitors
  • 100-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 bootstrap diode
  • Integrated soft start
  • Fully WEBENCH enabled
  • LM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)
  • PFM (exposed pad) package

The LM22678 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 that can provide up to 5 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 (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The new product, LM61460, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare.Start WEBENCH design with LM61460

The LM22678 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 LM22678 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 that can provide up to 5 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 (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The new product, LM61460, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare.Start WEBENCH design with LM61460

The LM22678 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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功能相同，但針腳輸出與所比較的裝置不同。
LM61460-Q1 現行 車用 3-V 至 36-V、6-A、低雜訊同步降壓轉換器 Smaller solution size, higher efficiency at light load, lower EMI with HotRod™ QFN packaging and spread spectrum.

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 LM22678/-Q1 42-V, 5-A SIMPLE SWITCHER® Step-Down Voltage Regulator With Easy-to-Use Package datasheet (Rev. M) PDF | HTML 2020/10/23
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
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-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-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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模擬型號

LM22678-Q1-ADJ PSpice Transient Model

SNVM333.ZIP (108 KB) - PSpice 模型
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模擬型號

LM22678-Q1-ADJ Unencrypted PSpice Transient Model

SNVM827.ZIP (3 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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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TO-263 (NDR) 7 Ultra Librarian
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