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LMR62421

現行

SOT-23 中的 SIMPLE SWITCHER 2.7V 至 5.5V、24Vout、2.1A 升壓轉換器

產品詳細資料

Rating Catalog Topology Boost Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 24 Vout (min) (V) 3 Switch current limit (typ) (A) 3 Features Enable, Nonsynchronous rectification Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.007 Duty cycle (max) (%) 96
Rating Catalog Topology Boost Vin (max) (V) 5.5 Vin (min) (V) 2.7 Vout (max) (V) 24 Vout (min) (V) 3 Switch current limit (typ) (A) 3 Features Enable, Nonsynchronous rectification Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.007 Duty cycle (max) (%) 96
SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) WSON (NGG) 6 9 mm² (3 mm × 3 mm)
  • Input Voltage Range of 2.7V to 5.5V
  • Output Voltage up to 24V
  • Switch Current up to 2.1A
  • 1.6 MHz Switching Frequency
  • Low Shutdown Iq, 80 nA
  • Cycle-by-Cycle Current Limiting
  • Internally Compensated
  • Internal Soft-Start
  • 5-Pin SOT-23 (2.92 x 2.84 x 1mm) and 6-Pin WSON (3 x 3 x 0.8 mm) Packaging
  • Fully Enabled for WEBENCH® Power Designer

Performance Benefits

  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

All trademarks are the property of their respective owners.

  • Input Voltage Range of 2.7V to 5.5V
  • Output Voltage up to 24V
  • Switch Current up to 2.1A
  • 1.6 MHz Switching Frequency
  • Low Shutdown Iq, 80 nA
  • Cycle-by-Cycle Current Limiting
  • Internally Compensated
  • Internal Soft-Start
  • 5-Pin SOT-23 (2.92 x 2.84 x 1mm) and 6-Pin WSON (3 x 3 x 0.8 mm) Packaging
  • Fully Enabled for WEBENCH® Power Designer

Performance Benefits

  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

All trademarks are the property of their respective owners.

The LMR62421 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors while providing efficiencies near 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny 5-pin SOT-23 and 6-pin WSON packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

The LMR62421 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors while providing efficiencies near 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny 5-pin SOT-23 and 6-pin WSON packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

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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 LMR62421 SIMPLE SWITCHER ® 24Vout, 2.1A Step-Up Voltage Regulator in SOT-23 datasheet (Rev. B) 2013/4/4
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
應用說明 Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 2022/10/28
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
技術文章 DC/DC converter datasheets- current limit - part two PDF | HTML 2016/9/5
技術文章 DC/DC converter datasheets: current limit - part one PDF | HTML 2016/8/29
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 Inverted SEPIC Made SIMPLE 2015/7/31
應用說明 Softstart Using Constant Current Constant Voltage Approach 2015/7/24
應用說明 Working With Boost Converters 2015/6/15
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-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
應用說明 Understanding Boost Power Stages In Switchmode Power Supplies 1999/3/4

設計與開發

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開發板

LMR62421XSDDEMO — LMR62421 SIMPLE SWITCHER® 24V 輸出、2.1A 小型升壓穩壓器展示板

The LMR62421 is a high frequency switching boost regulator which offers small size and high power conversion efficiency. The part operates at a 1.6MHz switching frequency. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in (...)

使用指南: PDF
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LAUNCHXL-F28379D — 適用 C2000™ Delfino™ MCU 的 F28379D LaunchPad™ 開發套件

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模擬型號

LMR62421 TINA-TI Transient Reference Design

SNVM625.ZIP (185 KB) - TINA-TI 參考設計
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模擬型號

LMR62421 TINA-TI Transient Spice Model

SNVM624.ZIP (14 KB) - TINA-TI Spice 模型
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模擬型號

LMR62421X PSpice Average Model

SNVM194.ZIP (48 KB) - PSpice 模型
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模擬型號

LMR62421X TINA-TI Average Reference Design

SNVM456.TSC (54 KB) - TINA-TI 參考設計
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模擬型號

LMR62421X Unencrypted PSpice Average Model

SNVM949.ZIP (1 KB) - PSpice 模型
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模擬型號

LMR62421X Unencrypted PSpice Transient Model

SNVM950.ZIP (2 KB) - PSpice 模型
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模擬型號

Unencrypted LMR62421X PSpice Transient Model (Rev. A)

SNVM195A.ZIP (170 KB) - PSpice 模型
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參考設計

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
WSON (NGG) 6 Ultra Librarian

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