LM2597

正在供貨

SIMPLE SWITCHER 電源轉換器 150kHz 0.5A 降壓電壓穩壓器

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功能與比較器件相同，但引腳排列有所不同
LMR54406 正在供貨 4V 至 36V、0.6A、80-μA Iq 同步降壓 SIMPLE SWITCHER? 電源轉換器 Next-generation with lower IQ.
TPSM365R6 正在供貨 3-65V 輸入 1-13V 輸出 0.6A 同步降壓轉換器電源模塊 Next-generation power module with spread spectrum and frequency synchronization.

產品詳情

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 Overcurrent protection, Power good Control mode Voltage mode Switching frequency (min) (kHz) 110 Switching frequency (max) (kHz) 173 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 5000 Duty cycle (max) (%) 100 Type Converter
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 Overcurrent protection, Power good Control mode Voltage mode Switching frequency (min) (kHz) 110 Switching frequency (max) (kHz) 173 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 5000 Duty cycle (max) (%) 100 Type Converter
PDIP (P) 8 92.5083 mm2 9.81 x 9.43 SOIC (D) 8 29.4 mm2 4.9 x 6
  • 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 HV Version) ±4% Maximum Over
    Line and Load Conditions
  • Specified 0.5-A Output Current
  • Available in 8-Pin Surface-Mount and 8-Pin PDIP
    Packages
  • Input Voltage Range Up to 60 V
  • 150-kHz Fixed-Frequency Internal Oscillator
  • Shutdown/Soft-Start
  • Out of Regulation Error Flag
  • Error Output Delay
  • Bias Supply Pin (VBS) for Internal Circuitry
    Improves Efficiency at High Input Voltages
  • 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 (57 V for HV Version) ±4% Maximum Over
    Line and Load Conditions
  • Specified 0.5-A Output Current
  • Available in 8-Pin Surface-Mount and 8-Pin PDIP
    Packages
  • Input Voltage Range Up to 60 V
  • 150-kHz Fixed-Frequency Internal Oscillator
  • Shutdown/Soft-Start
  • Out of Regulation Error Flag
  • Error Output Delay
  • Bias Supply Pin (VBS) for Internal Circuitry
    Improves Efficiency at High Input Voltages
  • Low Power Standby Mode, IQ, Typically 85 μA
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current-Limit Protection

The LM2597xx 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 an 8-pin PDIP and an 8-pin surface-mount package.

This series of switching regulators is similar to the LM2594 series, with additional supervisory and performance features added.

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 LM2597xx 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. Because of its high efficiency, the copper traces on the printed-circuit board are normally the only heat sinking required.

A standard series of inductors (both through-hole and surface-mount types) are available from several different manufacturers optimized for use with the LM2597xx series. 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 LM2597HV is for use in applications requiring and input voltage up to 60 V.

The LM2597xx 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 an 8-pin PDIP and an 8-pin surface-mount package.

This series of switching regulators is similar to the LM2594 series, with additional supervisory and performance features added.

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 LM2597xx 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. Because of its high efficiency, the copper traces on the printed-circuit board are normally the only heat sinking required.

A standard series of inductors (both through-hole and surface-mount types) are available from several different manufacturers optimized for use with the LM2597xx series. 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 LM2597HV is for use in applications requiring and input voltage up to 60 V.
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技術文檔

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類型 標題 下載最新的英語版本 日期
* 數據表 LM2597, LM2597HV SIMPLE SWITCHER? Power Converter 150-kHz 0.5-A Step-Down Voltage Regulator With Features 數據表 (Rev. D) PDF | HTML 2016年 5月 31日
應用手冊 半導體和 IC 封裝熱指標 (Rev. D) PDF | HTML 英語版 (Rev.D) PDF | HTML 2024年 4月 24日
技術文章 How to increase system reliability and simplify design using DC/DC converters PDF | HTML 2016年 6月 13日
技術文章 The importance of accurate switching frequency and current limit when selecting bu PDF | HTML 2016年 4月 19日
技術文章 Advantages of leaded packages in robust industrial designs PDF | HTML 2016年 3月 8日
應用手冊 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
應用手冊 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
應用手冊 AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B) 2013年 4月 23日
應用手冊 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
應用手冊 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
應用手冊 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
應用手冊 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
應用手冊 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
應用手冊 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
應用手冊 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
應用手冊 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
應用手冊 Simple Techniques Minimize Cross-Coupling in Distributed Power Systems 2007年 3月 21日
應用手冊 Input and Output Capacitor Selection 2005年 9月 19日
更多文獻資料 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
應用手冊 AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計和開發

如需其他信息或資源，請點擊以下任一標題進入詳情頁面查看（如有）。

仿真模型

LM2597-ADJ PSpice Transient Model

SNVMAE4.ZIP (74 KB) - PSpice Model
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仿真模型

LM2597-ADJ Unencrypted PSpice Transient Model

SNVMAE3.ZIP (3 KB) - PSpice Model
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封裝 引腳 CAD 符號、封裝和 3D 模型
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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