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DC/DC 切換穩壓器
DC/DC 轉換器

LM43601

現行

3.5V 至 36V、1A 同步降壓電壓轉換器

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。
LMR33610 現行 採用 SOIC-8 封裝的 SIMPLE SWITCHER® 3.8V 至 36V、1A 同步降壓轉換器 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LM43601

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 1 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 Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000033 Duty cycle (max) (%) 99
Rating Catalog Topology Buck Iout (max) (A) 1 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 Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000033 Duty cycle (max) (%) 99
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • 33-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 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 LM43601 With the WEBENCH® Power Designer
  • 33-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 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 LM43601 With the WEBENCH® Power Designer

The LM43601 regulator is an easy to use synchronous step-down DC-DC converter capable of driving up to 1 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V transient). The LM43601 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 2-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 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 LM43601 device is available in the 16-leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. This device is pin-to-pin compatible with LM46000, LM46001, LM46002, LM43600, LM43602, and LM43603.

The LM43601 regulator is an easy to use synchronous step-down DC-DC converter capable of driving up to 1 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V transient). The LM43601 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 2-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 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 LM43601 device is available in the 16-leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. This device is pin-to-pin compatible with LM46000, LM46001, LM46002, LM43600, LM43602, and LM43603.

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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 LM43601 3.5-V to 36-V, 1-A Synchronous Step-Down Voltage Converter datasheet (Rev. B) PDF | HTML 2018/1/10
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
應用說明 Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 2021/7/26
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
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
更多文件說明 SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) 2016/2/8
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 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

LM43601PWPEVM — LM43601PWP 同步降壓轉換器評估模組

LM43601PWPEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LM43601PWP 同步降壓轉換器。此 EVM 可在 3.5V 至 36V 輸入之間運作，並在 1A 時提供 3.3V 輸出。

使用指南: PDF
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模擬型號

LM43601 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM647A.ZIP (625 KB) - PSpice 模型
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模擬型號

LM43601 PSpice Average Model

SNVM648.ZIP (89 KB) - PSpice 模型
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模擬型號

LM43601 Unencrypted PSpice Average Model

SNVM721.ZIP (1 KB) - PSpice 模型
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參考設計

TIDA-00885 — 由降壓轉換器供電的 9.8 GHz 射頻高效能合成器參考設計

TIDA-00885 參考設計採用 LMX2592 低雜訊寬頻 RF PLL，該晶片整合 VCO，可產生 20 MHz 至 9.8 GHz 的輸出頻率範圍。LMX2592 具備卓越性能，在 6GHz 輸出時整合相位雜訊僅 49fs，是理想的低雜訊源。LMX2592 頻率合成器有兩種供電方案可選：TPS62150 與 LM43601 降壓轉換器，均採用常用封裝規格。  LM43601 的接腳與 LM46000、LM46001、LM46002、LM43600、LM43602 及 LM43603 完全相容。TPS62150 DC-DC 穩壓器與 TPS6213x、TPS6214x (...)
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 16 Ultra Librarian
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