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LM2594-12MWC PDF预览

LM2594-12MWC

更新时间： 2024-11-23 20:47:51
品牌 Logo 应用领域
美国国家半导体 - NSC 开关
页数 文件大小 规格书
28页 737K
描述
IC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator or Controller

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LM2594-12MWC 技术参数

生命周期：Transferred包装说明：DIE, WAFER
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.55
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
最大输入电压：40 V最小输入电压：4.5 V
标称输入电压：25 VJESD-30 代码：X-XUUC-N
功能数量：1最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：1.4 A
封装主体材料：UNSPECIFIED封装代码：DIE
封装等效代码：WAFER封装形状：UNSPECIFIED
封装形式：UNCASED CHIP认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：173 kHz
技术：BIPOLAR温度等级：AUTOMOTIVE
端子形式：NO LEAD端子位置：UPPER
Base Number Matches：1

LM2594-12MWC 数据手册

 浏览型号LM2594-12MWC的Datasheet PDF文件第2页浏览型号LM2594-12MWC的Datasheet PDF文件第3页浏览型号LM2594-12MWC的Datasheet PDF文件第4页浏览型号LM2594-12MWC的Datasheet PDF文件第5页浏览型号LM2594-12MWC的Datasheet PDF文件第6页浏览型号LM2594-12MWC的Datasheet PDF文件第7页 
December 1999  
LM2594/LM2594HV  
SIMPLE SWITCHER® Power Converter 150 kHz 0.5A  
Step-Down Voltage Regulator  
The LM2594HV is for applications requiring an input voltage  
up to 60V.  
General Description  
The LM2594/LM2594HV series of regulators are monolithic  
integrated circuits that provide all the active functions for a  
step-down (buck) switching regulator, capable of driving a  
0.5A load with excellent line and load regulation. These de-  
vices are available in fixed output voltages of 3.3V, 5V, 12V,  
and an adjustable output version, and are packaged in a  
8-lead DIP and a 8-lead surface mount package.  
Features  
n 3.3V, 5V, 12V, and adjustable output versions  
n Adjustable version output voltage range, 1.2V to 37V  
(57V for the HV version) 4% max over line and load  
conditions  
±
n Available in 8-pin surface mount and DIP-8 package  
n Guaranteed 0.5A output current  
n Input voltage range up to 60V  
Requiring a minimum number of external components, these  
regulators are simple to use and feature internal frequency  
†
compensation , a fixed-frequency oscillator, and improved  
line and load regulation specifications.  
n Requires only 4 external components  
n 150 kHz fixed frequency internal oscillator  
n TTL Shutdown capability  
n Low power standby mode, IQ typically 85 µA  
n High Efficiency  
The LM2594/LM2594HV series operates at a switching fre-  
quency of 150 kHz thus allowing smaller sized filter compo-  
nents than what would be needed with lower frequency  
switching regulators. Because of its high efficiency, the cop-  
per traces on the printed circuit board are normally the only  
heat sinking needed.  
n Uses readily available standard inductors  
n Thermal shutdown and current limit protection  
A standard series of inductors (both through hole and sur-  
face mount types) are available from several different manu-  
facturers optimized for use with the LM2594/LM2594HV se-  
ries. This feature greatly simplifies the design of  
switch-mode power supplies.  
Applications  
n Simple high-efficiency step-down (buck) regulator  
n Efficient pre-regulator for linear regulators  
n On-card switching regulators  
±
Other features include a guaranteed 4% tolerance on out-  
put voltage under all conditions of input voltage and output  
n Positive to Negative convertor  
±
load conditions, and 15% on the oscillator frequency. Ex-  
ternal 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.  
Typical Application (Fixed Output Voltage Versions)  
DS012439-1  
™
SIMPLE SWITCHER and Switchers Made Simple are registered trademarks of National Semiconductor Corporation.  
© 2000 National Semiconductor Corporation  
DS012439  
www.national.com  
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