LM2576

現行

SIMPLE SWITCHER® 40V、3A 低零組件數降壓穩壓器

立即訂購

產品規格表

document-pdfAcrobat LM2576xx Series SIMPLE SWITCHER Power Converter 3-A Step-Down Voltage Regulator datasheet (Rev. G) (英文) PDF | HTML

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比較替代產品

功能相同，但針腳輸出與所比較的裝置不同。

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.

LMQ66430

現行

具有 1.5-µA IQ 的 36-V、3-A 低 EMI 同步降壓轉換器 Integrated input bypass capacitor and boot cap for lower EMI and smaller footprint, dual-random spread spectrum and lower IQ.

LM2576

現行

立即訂購

產品詳細資料

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

TO-263 (KTT)

5

154.8384 mm² (10.16 mm × 15.24 mm)

TO-220 (NDH)

5

86.0552 mm² (10.16 mm × 8.47 mm)

TO-220 (KC)

5

45.212 mm² (10.16 mm × 4.45 mm)

TO-220 (NEB)

5

46.4312 mm² (10.16 mm × 4.57 mm)

Newer products available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
- LM76003 3.5 to 60-V, 3.5-A, 300-kHz to 2.2-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, 15-V, and adjustable output versions
Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 3-A output current
Wide input voltage range: 40 V Up to 60 V for HV version
Requires only four external components
52-kHz fixed-frequency internal oscillator
TTL-shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer

Newer products available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
- LM76003 3.5 to 60-V, 3.5-A, 300-kHz to 2.2-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, 15-V, and adjustable output versions
Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 3-A output current
Wide input voltage range: 40 V Up to 60 V for HV version
Requires only four external components
52-kHz fixed-frequency internal oscillator
TTL-shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 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, 15 V, and an adjustable output version.

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

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 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, 15 V, and an adjustable output version.

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

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.

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LMR33630

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具超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、3A 同步降壓轉換器 Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-low EMI.

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重要文件	類型	標題	格式選項
*	資料表	LM2576xx Series SIMPLE SWITCHER Power Converter 3-A Step-Down Voltage Regulator datasheet (Rev. G)	PDF \| HTML	2023/3/22
	應用說明	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024/3/25
	應用說明	Switching regulator fundamentals (Rev. C)	PDF \| HTML	2019/2/5
	技術文章	How to increase system reliability and simplify design using DC/DC converters	PDF \| HTML	2016/6/13
	技術文章	The importance of accurate switching frequency and current limit when selecting bu	PDF \| HTML	2016/4/19
	技術文章	Advantages of leaded packages in robust industrial designs	PDF \| HTML	2016/3/8
	應用說明	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		2014/9/12
	應用說明	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013/4/24
	應用說明	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013/4/23
	應用說明	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013/4/23
	應用說明	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		2013/4/23
	應用說明	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		2013/4/23
	應用說明	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013/4/23
	應用說明	AN-776 20-W SIMPLE SWITCHER Forward Converter (Rev. A)		2013/4/23
	應用說明	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		2013/4/23
	應用說明	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		2013/4/23
	應用說明	High-Efficiency 3A Battery Chargers Use LM2576 Regulators (Rev. B)		2013/4/23
	應用說明	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		2013/4/23
	應用說明	Battery Charging		2007/3/21
	應用說明	Buck Converters Provide a Battery Charger and System Power		2007/3/21
	應用說明	Input and Output Capacitor Selection		2005/9/19
	更多文件說明	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005/7/12
	應用說明	AN-643 EMI/RFI Board Design (Rev. B)		2004/5/3

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開發板

LM2576S-ADJEVM — LM2576 降壓轉換器評估模組

LM2576S-ADJEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LM2576 降壓轉換器。此 EVM 可在 7V 至 40V 輸入之間運作，並在 3A 時提供 5V 輸出。

使用指南: PDF

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SWITCHERSMADESIMPLE-SW — Switchers Made Simple® Software

Note: The Switchers Made Simple design computations have been incorporated into Texas Instruments' award winning WEBENCH Power Designer Online Design Tool. Please use TI's WEBENCH Power Designer online tools for new designs. The WEBENCH Design Tool also includes: