LM2598

正在供货

4.5V 至 40V、1A SIMPLE SWITCHER® 降压转换器

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open-in-new 比较替代产品
功能与比较器件相同,但引脚排列有所不同
LMR54410 正在供货 具有 80µA IQ 的 4.5V 至 36V、1A 同步降压 SIMPLE SWITCHER® 电源转换器 Next-generation with lower IQ.
TPSM33615 正在供货 3-36V 输入 1-15V 输出 1.5A 同步降压电源模块 Next-generation power module with spread spectrum and frequency synchronization.

产品详情

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 40 Switching frequency (min) (kHz) 110 Switching frequency (max) (kHz) 173 Features Over Current Protection, Power good Control mode Voltage mode Vout (min) (V) 3.3 Vout (max) (V) 37 Iq (typ) (µA) 5000 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 40 Switching frequency (min) (kHz) 110 Switching frequency (max) (kHz) 173 Features Over Current Protection, Power good Control mode Voltage mode Vout (min) (V) 3.3 Vout (max) (V) 37 Iq (typ) (µA) 5000 Duty cycle (max) (%) 100
TO-220 (NDZ) 7 82.6008 mm² 10.16 x 8.13 TO-263 (KTW) 7 153.924 mm² 10.1 x 15.24
  • 3.3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range, 1.2-V
    to 37-V ±4% Max Over Line and Load Conditions
  • 1-A Output Current
  • Available in 7-Pin TO-220 and DDPAK (Surface
    Mount) Package
  • Input Voltage Range Up to 40 V
  • Excellent Line and Load Regulation Specifications
  • 150 kHz Fixed Frequency Internal Oscillator
  • Shutdown/Soft-start
  • Out of Regulation Error Flag
  • Error Output Delay
  • Low Power Standby Mode, IQ, Typically 85 µA
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current Limit Protection
  • 3.3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range, 1.2-V
    to 37-V ±4% Max Over Line and Load Conditions
  • 1-A Output Current
  • Available in 7-Pin TO-220 and DDPAK (Surface
    Mount) Package
  • Input Voltage Range Up to 40 V
  • Excellent Line and Load Regulation Specifications
  • 150 kHz Fixed Frequency Internal Oscillator
  • Shutdown/Soft-start
  • Out of Regulation Error Flag
  • Error Output Delay
  • Low Power Standby Mode, IQ, Typically 85 µA
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current Limit Protection

The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-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.

The LM2598 is a member of the LM259x family.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, error flag delay and error flag output.

The LM2598 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower-frequency switching regulators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead DDPAK surface mount package. Typically, for output voltages less than 12 V, and ambient temperatures less than 50°C, no heat sink is required.

A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2598. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±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 current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-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.

The LM2598 is a member of the LM259x family.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, error flag delay and error flag output.

The LM2598 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower-frequency switching regulators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead DDPAK surface mount package. Typically, for output voltages less than 12 V, and ambient temperatures less than 50°C, no heat sink is required.

A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2598. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±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 current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM2598 SIMPLE SWITCHER® Power Converter 150-kHz 1-A Step-Down Voltage Regulator, With Features 数据表 (Rev. D) PDF | HTML 2016年 5月 31日
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年 4月 24日
技术文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016年 6月 13日
技术文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016年 4月 19日
技术文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016年 3月 8日
应用手册 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
应用手册 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
应用手册 AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B) 2013年 4月 23日
应用手册 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
应用手册 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
应用手册 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
应用手册 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
应用手册 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
应用手册 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
应用手册 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
应用手册 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
应用手册 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
应用手册 Input and Output Capacitor Selection 2005年 9月 19日
更多文献资料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
应用手册 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

仿真模型

LM2598_ADJ PSpice Transient Model

SNVMAE1.ZIP (101 KB) - PSpice Model
仿真模型

LM2598_ADJ Unencrypted PSpice Transient Model

SNVMAE2.ZIP (3 KB) - PSpice Model
封装 引脚 CAD 符号、封装和 3D 模型
TO-220 (NDZ) 7 Ultra Librarian
TO-263 (KTW) 7 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

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