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AC/DC & DC/DC converters (integrated FET)

LM46000

現行

3.5 - 60V、500mA 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，但引腳輸出與所比較的產品不同
LMR36506 現行 具有 4μA IQ 的 3V 至 65V、0.6A 超小型同步降壓轉換器 Smaller footprint, lower IQ and lower EMI.
TPSM365R6 現行 3-V 至 65-V 輸入、1-V 至 13-V 輸出、0.6-A 同步降壓轉換器電源模組 Smaller design with an integrated-inductor power module.

LM46000

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 0.5 Vin (min) (V) 3.5 Vin (max) (V) 60 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 1 Vout (max) (V) 28 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000024
Iout (max) (A) 0.5 Vin (min) (V) 3.5 Vin (max) (V) 60 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 1 Vout (max) (V) 28 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000024
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • 24-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 Prebiased 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 LM46000 With the WEBENCH® Power Designer
  • 24-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 Prebiased 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 LM46000 With the WEBENCH® Power Designer

The LM46000 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 500 mA of load current from an input voltage range of 3.5 V to 60 V. The LM46000 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 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 LM46000 device is available in the 16-pin leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. Pin-to-pin compatible with LM46001, LM46002, LM43603, LM43602, LM43601, and LM43600.

The LM46000 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 500 mA of load current from an input voltage range of 3.5 V to 60 V. The LM46000 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 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 LM46000 device is available in the 16-pin leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. Pin-to-pin compatible with LM46001, LM46002, LM43603, LM43602, LM43601, and LM43600.
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類型 標題 日期
* Data sheet LM46000 3.5-V to 60-V, 0.5-A Synchronous Step-Down Voltage Converter datasheet (Rev. B) PDF | HTML 2018年 3月 22日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019年 3月 12日
Application note Differences Between LM4600x/LM4360x A and Non-A OPNs 2018年 3月 27日
White paper Synchronous Rectification in High-Performance Power Converter Design (Rev. A) 2016年 9月 15日
More literature SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) 2016年 2月 8日
Application note Cap Drop Offline Supply for E-Meters 2015年 6月 16日
Application note Cost-Effective Transformerless Offline Supply for Light Load Applications (Rev. A) 2015年 6月 16日
Technical article Inverting made simple by unleashing the buck PDF | HTML 2015年 5月 19日
Application note Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) 2015年 2月 20日
Application note Thermal Design Made Simple With LM43603 and LM46002 2014年 9月 15日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note Compensation Made SIMPLE With LM4360x, LM4600x 2014年 7月 29日
EVM User's guide LM46000EVM User Guide 2014年 4月 16日
Application note AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) 2013年 5月 6日
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 2013年 5月 6日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
Application note Understanding and Applying Current-Mode Control Theory 2007年 8月 19日
Application note Input and Output Capacitor Selection 2005年 9月 19日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計與開發

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開發板

LM46000PWPEVM — LM46000PWP 同步降壓轉換器評估模組

The LM46000PWPEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM46000PWP synchronous step-down converter. The EVM operates from a 3.5V to 60V input and provides a 3.3V output at 0.5A.

使用指南: PDF
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模擬型號

LM46000 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SLIM317A.ZIP (154 KB) - PSpice Model
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模擬型號

LM46000 PSpice Average Model

SLIM318.ZIP (76 KB) - PSpice Model
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模擬型號

LM46000 Unencrypted Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM728A.ZIP (8 KB) - PSpice Model
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模擬型號

LM46000 Unencrypted PSpice Average Model

SNVM727.ZIP (1 KB) - PSpice Model
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