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DC/DC 切換穩壓器
DC/DC 轉換器

LM43602

現行

3.5V 至 36V、2A 同步降壓電壓轉換器

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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
功能相同，但針腳輸出與所比較的裝置不同。
LMR33620 現行 具超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、2A 同步降壓轉換器 Smaller footprint, higher efficiency, lower IQ and lower EMI.
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 Smaller design with an integrated-inductor power module.

LM43602

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 2 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, Pre-bias startup, Synchronous rectification, Tracking, Wettable flanks package Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000027 Duty cycle (max) (%) 99
Rating Catalog Topology Buck Iout (max) (A) 2 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, Pre-bias startup, Synchronous rectification, Tracking, Wettable flanks package Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000027 Duty cycle (max) (%) 99
VSON (DSU) 16 20 mm² (5 mm × 4 mm) HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 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 Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43602 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 Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43602 with the WEBENCH® Power Designer

The LM43602 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 36 V (42-V absolute maximum). The LM43602 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 3-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 terminal 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 LM43602 device is available in a 16-lead HTSSOP package (5.1 mm × 6.6 mm × 1.2 mm) and 16-pin VSON package with wettable flanks.

The LM43602 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 36 V (42-V absolute maximum). The LM43602 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 3-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 terminal 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 LM43602 device is available in a 16-lead HTSSOP package (5.1 mm × 6.6 mm × 1.2 mm) and 16-pin VSON package with wettable flanks.
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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 LM43602 3.5-V to 36-V, 2-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) PDF | HTML 2017/10/5
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
選擇指南 Buck Converter Quick Reference Guide (Rev. B) 2021/4/8
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
更多文件說明 SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) 2016/2/8
技術文章 How to control turn on/off thresholds in voltage regulators using a logic level UV PDF | HTML 2015/7/23
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

LM43602PWPEVM — LM43602 同步降壓轉換器評估模組

德州儀器 LM43602EVM 評估模組 (EVM) 可協助設計師評估 LM43602 Wide-Vin Simple Switcher® 2A 降壓穩壓器的運作及性能。此裝置提供可配置的輸出電壓（1.0V 至 28V）、同步整流功能，以及可調整的頻率範圍（200kHz 至 2.2MHz）。其也提供外部頻率同步、電源良好旗標、精密啟用賦能，以編程 UVLO 和內部補償。LM43602EVM 配置為輸出電壓 3.3V，切換頻率 500kHz。

使用指南: PDF
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模擬型號

LM43602 PSpice Average Model

SNVM577.ZIP (84 KB) - PSpice 模型
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模擬型號

LM43602 TINA-TI Average Model

SNVM688.ZIP (9 KB) - TINA-TI Spice 模型
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模擬型號

LM43602 TINA-TI Average Reference Design

SNVM689.TSC (125 KB) - TINA-TI 參考設計
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LM43602 TINA-TI Transient Reference Design

SNVM608.TSC (86 KB) - TINA-TI 參考設計
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LM43602 TINA-TI Transient Spice Model

SNVM607.ZIP (51 KB) - TINA-TI Spice 模型
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模擬型號

LM43602 Unencrypted PSpice Average Model

SNVM723.ZIP (1 KB) - PSpice 模型
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSON (DSU) 16 Ultra Librarian
HTSSOP (PWP) 16 Ultra Librarian
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