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DC/DC 轉換器

LM43603

現行

3.5V 至 36V、3A 同步降壓電壓轉換器

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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。
TLVM13630 現行 高密度、3-V 至 36-V 輸入、1-V 至 6-V 輸出、3-A 降壓電源模組 Smaller design with an integrated-inductor power module.

LM43603

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 28 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Synchronous rectification, Tracking Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000027 Duty cycle (max) (%) 99 Sector Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 28 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Synchronous rectification, Tracking Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000027 Duty cycle (max) (%) 99 Sector Test & measurement
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm) VSON (DSU) 16 20 mm² (5 mm × 4 mm)
  • 27-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable with Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft Start into a Pre-Biased Load
  • Internal Soft-Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to a Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43603 with the WEBENCH® Power Designer
  • 27-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable with Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft Start into a Pre-Biased Load
  • Internal Soft-Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to a Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43603 with the WEBENCH® Power Designer

The LM43603 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V abs max). The LM43603 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 2-A load current options in pin to pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft-start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM43603 device is available in the HTSSOP / PWP 16 leaded package (5.1 mm × 6.6 mm × 1.2 mm) and VSON-16 package with wettable flanks. HTSSOP package is pin-to-pin compatible with LM43600, LM43601, LM43602, LM46000, LM46001, LM46002. VSON-16 package is only pin-to-pin compatible with LM43602.

The LM43603 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V abs max). The LM43603 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 2-A load current options in pin to pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft-start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM43603 device is available in the HTSSOP / PWP 16 leaded package (5.1 mm × 6.6 mm × 1.2 mm) and VSON-16 package with wettable flanks. HTSSOP package is pin-to-pin compatible with LM43600, LM43601, LM43602, LM46000, LM46001, LM46002. VSON-16 package is only pin-to-pin compatible with LM43602.
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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 LM43603 3.5-V to 36-V, 3A Synchronous Step-Down Voltage Converter datasheet (Rev. D) PDF | HTML 2017/8/8
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
應用說明 Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019/3/12
應用說明 Differences Between LM4600x/LM4360x A and Non-A OPNs 2018/3/27
白皮書 Synchronous Rectification in High-Performance Power Converter Design (Rev. A) PDF | HTML 2016/9/15
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 - Quiescent current demystified: Part two PDF | HTML 2016/4/11
技術文章 A complete low-voltage backup battery solution for eCall systems PDF | HTML 2016/3/5
更多文件說明 SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) 2016/2/8
技術文章 How to design a quiet and compact industrial power supply PDF | HTML 2015/7/21
應用說明 Know Your Limits 2015/6/2
技術文章 Inverting made simple by unleashing the buck PDF | HTML 2015/5/19
應用說明 Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) 2015/2/20
應用說明 Thermal Design Made Simple With LM43603 and LM46002 2014/9/15
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 Compensation Made SIMPLE With LM4360x, LM4600x 2014/7/29
應用說明 Automotive Line Transient Protection Circuit 2014/7/1
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-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-1197 Selecting Inductors for Buck Converters (Rev. B) 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-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-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
應用說明 Understanding and Applying Current-Mode Control Theory 2007/8/19
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

LM43603DSUEVM — LM43603DSU 同步降壓轉換器評估模組

LM43603DSUEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LM43603DSU 同步降壓轉換器。此 EVM 可在 3.5V 至 36V 輸入之間運作，並在 3A 時提供 5V 輸出。
使用指南: PDF
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開發板

LM43603PWPEVM — LM43603PWP 同步降壓轉換器評估模組

LM43603PWPEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LM43603PWP 同步降壓轉換器。此 EVM 可在 3.5V 至 36V 輸入之間運作，並在 3A 時提供 3.3V 輸出。

使用指南: PDF
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模擬型號

LM43603 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM585A.ZIP (525 KB) - PSpice 模型
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模擬型號

LM43603 PSpice Average Model

SNVM572.ZIP (76 KB) - PSpice 模型
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模擬型號

LM43603 TINA-TI Transient Reference Design

SNVM609.TSC (88 KB) - TINA-TI 參考設計
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模擬型號

LM43603 TINA-TI Transient Spice Model

SNVM605.ZIP (52 KB) - TINA-TI Spice 模型
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模擬型號

LM43603 Unencrypted PSpice Average Model

SNVM724.ZIP (1 KB) - PSpice 模型
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參考設計

PMP30046 — 企業級 SSD 備用電源參考設計

PMP30046 參考設計提供企業 SSD 備用電源供應器的系統解決方案。熱插拔控制器的輸入電壓可以是 5V 或 12V。降壓級將此輸入電壓轉換為 3.3V，最大負載電流為 2.5A。3.3V 升壓至 28V，用於為備用電容器充電。若發生電源故障事件，另一個降壓級會使用儲存在備用電容器中的能源，以 2.5A 最大負載電流向輸入軌供應 5V。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 16 Ultra Librarian
VSON (DSU) 16 Ultra Librarian
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