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LM2576T-ADJ/LB03

更新时间： 2024-01-04 08:56:24
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德州仪器 - TI 稳压器
页数 文件大小 规格书
37页 3998K
描述
LM2576/LM2576HV Series SIMPLE SWITCHER® 3A Step-Down Voltage Regulator

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LM2576, LM2576HV  
www.ti.com  
SNVS107C –JUNE 1999–REVISED APRIL 2013  
®
LM2576/LM2576HV Series SIMPLE SWITCHER 3A Step-Down Voltage Regulator  
Check for Samples: LM2576, LM2576HV  
1
FEATURES  
DESCRIPTION  
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 3A load with excellent line and load regulation.  
These devices are available in fixed output voltages  
of 3.3V, 5V, 12V, 15V, and an adjustable output  
version.  
23  
•
3.3V, 5V, 12V, 15V, and Adjustable Output  
Versions  
•
Adjustable Version Output Voltage  
Range,1.23V to 37V (57V for HV Version) ±4%  
Max Over Line and Load Conditions  
•
•
Specified 3A Output Current  
Wide Input Voltage Range, 40V Up to 60V for  
HV Version  
Requiring  
a
minimum number of external  
components, these regulators are simple to use and  
include internal frequency compensation and a fixed-  
frequency oscillator.  
•
•
•
Requires Only 4 External Components  
52 kHz Fixed Frequency Internal Oscillator  
The LM2576 series offers  
a
high-efficiency  
TTL Shutdown Capability, Low Power Standby  
Mode  
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.  
•
•
•
High Efficiency  
Uses Readily Available Standard Inductors  
Thermal Shutdown and Current Limit  
Protection  
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.  
•
P+ Product Enhancement Tested  
APPLICATIONS  
Other features include a specified ±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.  
•
Simple High-Efficiency Step-Down (Buck)  
Regulator  
•
•
•
Efficient Pre-Regulator for Linear Regulators  
On-Card Switching Regulators  
Positive to Negative Converter (Buck-Boost)  
TYPICAL APPLICATION  
(Fixed Output Voltage Versions)  
Figure 1.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
SIMPLE SWITCHER is a registered trademark of Texas Instruments.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  
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LM2576T-ADJ/LB03 替代型号

型号 品牌 替代类型 描述 数据表
LM2576T-ADJ/NOPB TI

类似代替

 LM2576/LM2576HV Series SIMPLE SWITCHER® 3A S
LM2577SX-ADJ/NOPB TI

功能相似

 SIMPLE SWITCHER® Step-Up Voltage Regulator
LM2577S-ADJ/NOPB TI

功能相似

 SIMPLE SWITCHER® Step-Up Voltage Regulator

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