LM2596

現行

SIMPLE SWITCHER® 4.5V 至 40V、3A 低零組件數降壓穩壓器

立即訂購

產品規格表

document-pdfAcrobat LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. G) (英文) PDF | HTML

現在提供此產品的更新版本

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比較替代產品

功能相同，但引腳輸出與所比較的產品不同

LMR51430

現行

具 40-µA IQ 的 SIMPLE SWITCHER® 4.5-V 至 36-V、3-A 同步降壓轉換器 Next-generation with lower IQ.

TLVM13630

現行

高密度、3-V 至 36-V 輸入、1-V 至 6-V 輸出、3-A 降壓電源模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.

TPSM63603

現行

高密度、3-V 至 36-V 輸入、1-V 至 16-V 輸出、3-A 電源模組 Next-generation with spread spectrum and frequency synchronization.

LM2596

現行

產品規格表

立即訂購

產品詳細資料

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

40

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

110

Switching frequency (max) (kHz)

173

Features

Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

3.3

Vout (max) (V)

37

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

40

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

110

Switching frequency (max) (kHz)

173

Features

Enable, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

3.3

Vout (max) (V)

37

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

TO-220 (NDH)

5

86.0552 mm² 10.16 x 8.47

TO-220 (NEB)

5

46.4312 mm² 10.16 x 4.57

TO-263 (KTT)

5

154.8384 mm² 10.16 x 15.24

New product available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
For faster time to market:
- TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module
3.3-V, 5-V, 12-V, and adjustable output versions
Adjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditions
Available in TO-220 and TO-263 packages
3-A output load current
Input voltage range up to 40 V
Requires only four external components
Excellent line and load regulation specifications
150-kHz fixed-frequency internal oscillator
TTL shutdown capability
Low power standby mode, I Q, typically 80 µA
High efficiency
Uses readily available standard inductors
Thermal shutdown and current-limit protection
Create a custom design using the LM2596 with the WEBENCH Power Designer

New product available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
For faster time to market:
- TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module
3.3-V, 5-V, 12-V, and adjustable output versions
Adjustable version output voltage range: 1.2-V to 37-V ±4% maximum over line and load conditions
Available in TO-220 and TO-263 packages
3-A output load current
Input voltage range up to 40 V
Requires only four external components
Excellent line and load regulation specifications
150-kHz fixed-frequency internal oscillator
TTL shutdown capability
Low power standby mode, I Q, typically 80 µA
High efficiency
Uses readily available standard inductors
Thermal shutdown and current-limit protection
Create a custom design using the LM2596 with the WEBENCH Power Designer

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-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.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what can be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 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 LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-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.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what can be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 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.

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	類型	標題		日期
*	Data sheet	LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. G)	PDF \| HTML	2023年 3月 22日
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024年 3月 25日
	Technical article	How to increase system reliability and simplify design using DC/DC converters	PDF \| HTML	2016年 6月 13日
	Technical article	The importance of accurate switching frequency and current limit when selecting bu	PDF \| HTML	2016年 4月 19日
	Technical article	Advantages of leaded packages in robust industrial designs	PDF \| HTML	2016年 3月 8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	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013年 4月 24日
	Application note	AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)		2013年 4月 23日
	Application note	AN-1082 Adjust or Synchronize LM2586/88 Switching Frequency (Rev. B)		2013年 4月 23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	Buck Converters Provide a Battery Charger and System Power		2007年 3月 21日
	Application note	Simple Techniques Minimize Cross-Coupling in Distributed Power Systems		2007年 3月 21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

LM2596S-ADJEVM — LM2596 降壓轉換器評估模組

The LM2596S-ADJEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM2596 step-down converter. The EVM operates from an 7V to 40V input and provides a 5V output at 3A.

使用指南: PDF