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LM2596

更新时间： 2024-11-18 11:46:35
品牌 Logo 应用领域
南京豪纳 - HN 显示器开关电视电子DVD
页数 文件大小 规格书
7页 170K
描述
3A 开关型、直流-直流降压转换电路。稳压压差要求2V,转换效率: 80-90% 应用:汽车电子,车载DVD,VCD,液晶显示器,液晶电视机

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LM2596 数据手册

 浏览型号LM2596的Datasheet PDF文件第2页浏览型号LM2596的Datasheet PDF文件第3页浏览型号LM2596的Datasheet PDF文件第4页浏览型号LM2596的Datasheet PDF文件第5页浏览型号LM2596的Datasheet PDF文件第6页浏览型号LM2596的Datasheet PDF文件第7页 
LM2596  
Feb. 2009  
LM2596  
3A Step-Down Voltage Regulator  
GENARAL DESCRIPTION  
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 3A load with excellent line and load regulation. These devices are  
available in fixed output voltages of 3.3V, 5V, 12V, 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 would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with  
several different lead bend options, and a 5-lead 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 guaranteed 3% tolerance on output voltage under specified input voltage and output load  
conditions, and 15% on the oscillator frequency. External shutdown is included,featuring typically 100 μA standby  
current. Self protection features include a two stage frequency reducing current limit for the output switch and an over  
temperature shutdown for complete protection under fault conditions.  
APPLICATIONS  
ƒ Simple high-efficiency step-down (buck) regulator  
ƒ On-card switching regulators  
ƒ Positive to negative converter  
FEATURES  
ƒ 3.3V, 5V, 12V, and adjustable output versions  
ƒ Adjustable version output voltage range, 1.2V to  
37V 3% max over line and load conditions  
ƒ Available in TO-220 and TO-263 packages  
ƒ Guaranteed 3A output load current  
ƒ Input voltage range up to 40V  
ƒ Requires only 4 external components  
ƒ Excellent line and load regulation specifications  
ƒ 150 kHz fixed frequency internal oscillator  
ƒ TTL shutdown capability  
ƒ Low power standby mode, IQ typically 100 μA  
ƒ High efficiency  
ƒ Uses readily available standard inductors  
ƒ Thermal shutdown and current limit protection  
ORDERING INFORMATION  
Output Voltage  
Package  
Type  
3.3  
5.0  
12  
ADJ  
LM2596S-3.3  
LM2596T-3.3  
LM2596S-5.0  
LM2596T-5.0  
LM2596S-12  
LM2596T-12  
LM2596S-ADJ  
LM2596T-ADJ  
TO-263  
TO-220  
PIN CONNECTION  
Bent and Staggered Leads, Through Hole  
Package  
5-Lead TO-220 (T)  
Surface Mount Package  
5-Lead TO-263 (S)  
Order Number LM2596S-3.3, LM2596S-5.0,  
LM2596S-12 or LM2596S-ADJ  
Order Number LM2596T-3.3, LM2596T-5.0,  
LM2596T-12 or LM2596T-ADJ  
ഄഔ: फҀᏖ⦴∳䏃 88 োˈᮄϪ⬠Ёᖗ B ᑻ 4004 ᅸ, 䚂㓪:210008  
⬉䆱(TEL.): (86)-25-68853600 Ӵⳳ(FAX): (86)-25-68853600-810  
ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE,  
NANJING 210008, CHINA  
WEB-SITE: WWW.HN-ELEC.COM  
NO. 88 ZHUJIANG RO1AD,  
1234567

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