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LM2594

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SIMPLE SWITCHER® 40V、500mA 低组件数降压稳压器

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open-in-new 比较替代产品
功能与比较器件相同但引脚有所不同。
LMR36506 正在供货 具有 4μA IQ 的 3V 至 65V、0.6A 超小型同步降压转换器 Next-generation converter with smaller package size, greater efficiency, and lower quiescent current.
TPSM365R6 正在供货 3-65V 输入 1-13V 输出 0.6A 同步降压转换器电源模块 Next-generation with spread spectrum and frequency synchronization.

LM2594

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产品详情

Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 3.3 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 4.5 Vout (max) (V) 37 Vout (min) (V) 3.3 Features Enable, Overcurrent protection Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.005 Duty cycle (max) (%) 100
PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • New product available:
  • For faster time to market:
  • 3.3-V, 5-V, 12-V, and adjustable output versions
  • Adjustable version output voltage range: 1.2 V to 37 V (57-V for the HV version), ±4% maximum over line and load conditions
  • Available in 8-pin surface-mount SOIC and 8-pin PDIP packages
  • Ensured 0.5-A output current
  • Input voltage range up to 60 V
  • Requires only four external components
  • 150-kHz fixed-frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, I Q typically 85 µA
  • High efficiency
  • Uses readily-available standard inductors
  • Thermal shutdown and current-limit protection
  • Create a custom design using the LM2594HV with the WEBENCH Power Designer
  • New product available:
  • For faster time to market:
  • 3.3-V, 5-V, 12-V, and adjustable output versions
  • Adjustable version output voltage range: 1.2 V to 37 V (57-V for the HV version), ±4% maximum over line and load conditions
  • Available in 8-pin surface-mount SOIC and 8-pin PDIP packages
  • Ensured 0.5-A output current
  • Input voltage range up to 60 V
  • Requires only four external components
  • 150-kHz fixed-frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, I Q typically 85 µA
  • High efficiency
  • Uses readily-available standard inductors
  • Thermal shutdown and current-limit protection
  • Create a custom design using the LM2594HV with the WEBENCH Power Designer

The LM2594xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version, and are packaged in a 8-pin PDIP and a 8-pin surface-mount SOIC package.

Requiring a minimum number of external components, these regulators are simple to use and feature internal frequency compensation, a fixed-frequency oscillator, and improved line and load regulation specifications.

The new product, LMR36506, offers reduced BOM cost, higher efficiency, and smaller solution size with many other features. See the Device Comparison Table to compare specs. Start WEBENCH Design with LMR36506.

A standard series of inductors (both through-hole and surface-mount types) are available from several different manufacturers optimized for use with the LM2594xx series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include an ensured ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85-µA standby current. Self-protection features include a two stage frequency reducing current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

The LM2594HV is for applications requiring an input voltage up to 60 V.

The LM2594xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version, and are packaged in a 8-pin PDIP and a 8-pin surface-mount SOIC package.

Requiring a minimum number of external components, these regulators are simple to use and feature internal frequency compensation, a fixed-frequency oscillator, and improved line and load regulation specifications.

The new product, LMR36506, offers reduced BOM cost, higher efficiency, and smaller solution size with many other features. See the Device Comparison Table to compare specs. Start WEBENCH Design with LMR36506.

A standard series of inductors (both through-hole and surface-mount types) are available from several different manufacturers optimized for use with the LM2594xx series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include an ensured ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85-µA standby current. Self-protection features include a two stage frequency reducing current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

The LM2594HV is for applications requiring an input voltage up to 60 V.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM2594xx SIMPLE SWITCHER Power Converter, 150-kHz, 0.5-A, Step-Down Voltage Regulator 数据表 (Rev. F) PDF | HTML 2023-5-31
应用手册 半导体和 IC 封装热指标 (Rev. D) PDF | HTML 英语版 (Rev.D) PDF | HTML 2024-4-24
技术文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016-6-13
技术文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016-4-19
技术文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016-3-8
应用手册 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014-9-12
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013-4-24
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013-4-23
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013-4-23
应用手册 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013-4-23
应用手册 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013-4-23
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013-4-23
应用手册 AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B) 2013-4-23
应用手册 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013-4-23
应用手册 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013-4-23
应用手册 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013-4-23
应用手册 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007-3-21
应用手册 Buck Converters Provide a Battery Charger and System Power 2007-3-21
应用手册 Input and Output Capacitor Selection 2005-9-19
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005-7-12
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004-5-3

设计与开发

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仿真模型

LM2594-ADJ PSpice Transient Model (Rev. A)

SNVMA69A.ZIP (82 KB) - PSpice 模型
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仿真模型

LM2594-ADJ Unencrypted PSpice Transient Model (Rev. A)

SNVMA68A.ZIP (2 KB) - PSpice 模型
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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