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DC/DC 轉換器

LM2842-Q1

現行

採用薄型 SOT-23 封裝的 SIMPLE SWITCHER® 4.5V 至 42V、0.6A 降壓穩壓器

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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
針腳對針腳的功能與所比較的裝置相同。
TPS560430-Q1 現行 車用 4V 至 36V、0.6A 同步降壓 SIMPLE SWITCHER® 電源轉換器 PFM and PWM selectable options.
功能相同，但針腳輸出與所比較的裝置不同。
LMR36006-Q1 現行 4.2V 至 60V、0.6A、超小型同步降壓轉換器 High frequency and tight current limit to lower inductor size

LM2842-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) 0.6 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Over Current Protection, Soft Start Fixed Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 94
Rating Automotive Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Over Current Protection, Soft Start Fixed Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013 Duty cycle (max) (%) 94
SOT-23-THN (DDC) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Input voltage 4.5 V to 42 V
  • Output current options of 100 mA, 300 mA, and 600 mA
  • Feedback pin voltage of 0.765 V
  • 550-kHz (X) or 1.25-MHz (Y) switching frequency
  • Low shutdown IQ: 16-µA typical
  • Short-circuit protected
  • Internally compensated
  • Soft-start circuitry
  • Small overall solution size (SOT-6L package)
  • Create a custom design using the LM2840-Q1 (or LM2841-Q1/42-Q1) with the WEBENCH® Power Designer
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Input voltage 4.5 V to 42 V
  • Output current options of 100 mA, 300 mA, and 600 mA
  • Feedback pin voltage of 0.765 V
  • 550-kHz (X) or 1.25-MHz (Y) switching frequency
  • Low shutdown IQ: 16-µA typical
  • Short-circuit protected
  • Internally compensated
  • Soft-start circuitry
  • Small overall solution size (SOT-6L package)
  • Create a custom design using the LM2840-Q1 (or LM2841-Q1/42-Q1) with the WEBENCH® Power Designer

The LM284x-Q1 SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an input range from 4.5 V to 42 V, they are suitable for a wide range of applications, such as power conditioning from unregulated sources. They feature a low RDSON (0.9‑Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X option) and 1.25 MHz (Y option), allowing the use of small external components while still being able to have low output voltage ripple. Soft start can be implemented using the shutdown (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840-Q1 is optimized for up to 100 mA, the LM2841-Q1 for up to 300 mA, and the LM2842-Q1 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x-Q1 are available in a low-profile SOT-6L package.

The LM284x-Q1 SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an input range from 4.5 V to 42 V, they are suitable for a wide range of applications, such as power conditioning from unregulated sources. They feature a low RDSON (0.9‑Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X option) and 1.25 MHz (Y option), allowing the use of small external components while still being able to have low output voltage ripple. Soft start can be implemented using the shutdown (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840-Q1 is optimized for up to 100 mA, the LM2841-Q1 for up to 300 mA, and the LM2842-Q1 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x-Q1 are available in a low-profile SOT-6L package.
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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 LM284x-Q1 Automotive SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT datasheet PDF | HTML 2019/4/25
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
技術文章 Quantifying the value of wide VIN PDF | HTML 2016/6/15
技術文章 DC/DC converter datasheets – System losses demystified PDF | HTML 2016/4/25
技術文章 DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016/4/18
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-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 2013/4/23
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
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

LM2842XMK-ADJEV — 適用於 LM2842 的評估板

The LM2842 evaluation board is designed to provide the design engineer with a fully functional power converter based on the buck topology to evaluate the LM2842 series of buck regulators. The evaluation board comes populated with the LM2842XMK-ADJL but can easily be modified to accommodate any of (...)

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LM2842X-Q1 PSpice Transient Model

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LM2842X-Q1 Unencrypted PSpice Transient Model

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LM2842Y-Q1 PSpice Transient Model

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LM2842Y-Q1 Unencrypted PSpice Transient Model

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SOT-23-THN (DDC) 6 Ultra Librarian
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