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LM2594

更新时间： 2024-11-23 12:02:11
品牌 Logo 应用领域
德州仪器 - TI 转换器稳压器
页数 文件大小 规格书
41页 1983K
描述
LM2594/LM2594HV SIMPLE SWITCHER® Power Converter 150 kHz 0.5A Step-Down Voltage Regulator

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LM2594 数据手册

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LM2594, LM2594HV  
www.ti.com  
SNVS118C –DECEMBER 1999–REVISED APRIL 2013  
®
LM2594/LM2594HV SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down  
Voltage Regulator  
Check for Samples: LM2594, LM2594HV  
1
FEATURES  
DESCRIPTION  
The LM2594/LM2594HV series of regulators are  
monolithic integrated circuits that provide all the  
active functions for a step-down (buck) switching  
2345  
•
3.3V, 5V, 12V, and Adjustable Output Versions  
•
•
Adjustable Version Output Voltage Range,  
1.2V to 37V (57V for the HV Version)±4% Max  
Over Line and Load Conditions  
regulator, capable of driving  
a 0.5A 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, and are packaged  
in a 8-lead PDIP and a 8-lead surface mount SOIC  
package.  
Available in 8-pin Surface Mount SOIC and  
PDIP-8 Package  
•
•
•
•
•
•
•
•
•
Ensured 0.5A Output Current  
Input Voltage Range up to 60V  
Requiring  
a
minimum number of external  
Requires only 4 External Components  
150 kHz Fixed Frequency Internal Oscillator  
TTL Shutdown Capability  
components, these regulators are simple to use and  
feature internal frequency compensation†, a fixed-  
frequency oscillator, and improved line and load  
regulation specifications.  
Low Power Standby Mode, IQ typically 85 μA  
High Efficiency  
The LM2594/LM2594HV 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. Because of  
its high efficiency, the copper traces on the printed  
circuit board are normally the only heat sinking  
needed.  
Uses Readily Available Standard Inductors  
Thermal Shutdown and Current Limit  
Protection  
APPLICATIONS  
A standard series of inductors (both through hole and  
surface mount types) are available from several  
different manufacturers optimized for use with the  
LM2594/LM2594HV series. This feature greatly  
simplifies the design of switch-mode power supplies.  
•
Simple High-efficiency Step-down (Buck)  
Regulator  
•
•
•
Efficient Pre-regulator for Linear Regulators  
On-card Switching Regulators  
Positive to Negative Convertor  
Other features include an ensured ±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 frequency  
reducing current limit for the output switch and an  
over temperature shutdown for complete protection  
under fault conditions.  
The LM2594HV is for applications requiring an input  
voltage up to 60V.  
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.  
2
3
4
5
Switchers Made Simple is a trademark of Texas Instruments.  
SIMPLE SWITCHER is a registered trademark of Texas Instruments.  
Switchers Made Simple is a registered trademark of dcl_owner.  
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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LM2594 替代型号

型号 品牌 替代类型 描述 数据表
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