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CRCW08051K50FKEA

更新时间： 2024-02-29 08:36:35
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
10页 741K
描述
LMZ1420xEXT/ LMZ1200xEXT Evaluation Board

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中文翻译

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CRCW08051K50FKEA 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：SMT, 0805
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8533.21.00.30Factory Lead Time：23 weeks
风险等级：0.75Samacsys Confidence：
Samacsys Status：ReleasedSamacsys PartID：602140
Samacsys Pin Count：2Samacsys Part Category：Resistor
Samacsys Package Category：Resistor ChipSamacsys Footprint Name：CRCW0805
Samacsys Released Date：2017-01-12 11:27:19Is Samacsys：N
其他特性：RATED AC VOLTAGE (V): 150构造：Rectangular
JESD-609代码：e3安装特点：SURFACE MOUNT
端子数量：2最高工作温度：155 °C
最低工作温度：-55 °C封装高度：0.45 mm
封装长度：2 mm封装形式：SMT
封装宽度：1.25 mm包装方法：TR, PAPER, 7 INCH
额定功率耗散 (P)：0.125 W额定温度：70 °C
参考标准：AEC-Q200电阻：1500 Ω
电阻器类型：FIXED RESISTOR尺寸代码：0805
表面贴装：YES技术：METAL GLAZE/THICK FILM
温度系数：200 ppm/ °C端子面层：Matte Tin (Sn) - with Nickel (Ni) barrier
端子形状：WRAPAROUND容差：5%
工作电压：150 VBase Number Matches：1

CRCW08051K50FKEA 数据手册

 浏览型号CRCW08051K50FKEA的Datasheet PDF文件第2页浏览型号CRCW08051K50FKEA的Datasheet PDF文件第3页浏览型号CRCW08051K50FKEA的Datasheet PDF文件第4页浏览型号CRCW08051K50FKEA的Datasheet PDF文件第5页浏览型号CRCW08051K50FKEA的Datasheet PDF文件第6页浏览型号CRCW08051K50FKEA的Datasheet PDF文件第7页 
National Semiconductor  
Application Note 2084  
Alan Martin  
LMZ1420xEXT /  
LMZ1200xEXT Evaluation  
Board  
August 16, 2010  
Introduction  
Board Specifications  
The LMZ1420xEXT and LMZ1200xEXT SIMPLE SWITCH-  
ER® power modules are easy-to-use DC-DC solution capa-  
ble of driving up to a 3A load with exceptional power  
conversion efficiency, output voltage accuracy, line and load  
regulation. They are available in an innovative package that  
enhances thermal performance and allows for hand or ma-  
chine soldering.  
•
•
•
•
•
•
•
•
•
LMZ1420xEXT VIN = 6V to 42V  
LMZ1420xEXT enable UVLO = 8V  
LMZ1420xEXT VOUT = 3.3V  
LMZ1200xEXT VIN = 4.5V to 20V  
LMZ1200xEXT enable UVLO = 4.5V  
LMZ1200xEXT VOUT = 1.8V  
Operates at full load up to 80°C ambient at 12V input  
The LMZ14203EXT/2EXT/1EXT can accept an input voltage  
rail between 6V and 42V and the LMZ12003EXT/2EXT/1EXT  
can accept an input voltage rail between 4.5V and 20V. The  
devices can deliver an adjustable and highly accurate output  
voltage as low as 0.8V and as high as 6V. The control struc-  
ture is constant on-time with input voltage feed forward. This  
creates a nearly constant switching frequency across the in-  
put voltage range. The control loop operates well with low  
ESR output capacitors such as ceramics. An output feed-for-  
ward capacitor across the upper feedback resistor trims for  
optimum transient response. The precision enable input al-  
lows for programmable UVLO of the input supply. The exter-  
nal soft-start capacitor facilitates controlled startup output rise  
time. The LMZ1420xEXT and LMZ1200xEXT family is a reli-  
able and robust solution with the following features: lossless  
cycle-by-cycle valley current limit to protect for over current  
or short-circuit fault, thermal shutdown, input under-voltage  
lock-out, and will start up into a pre-biased output. The  
LMZ1420xEXT and LMZ1200xEXT families are shock and  
vibration certified and rated for operation down to –55°C.  
θ
JA = 20°C / W, θJC = 1.9°C / W  
Designed on four layers, all four layers are 1 oz. copper  
weight  
•
•
The two internal ground planes are identical  
Measures 1.705 in. x 3.03 in. (4.33 cm x 7.7cm) and is  
62mil (.062”) thick of FR4 laminate material  
For additional circuit modifications refer to the Design Con-  
sideration section of the LMZ1420xEXT or LMZ1200xEXT  
data sheet. For negative output voltage connections see  
AN-2027.  
Additional Footprints  
Additional component mounting pads are available to exper-  
iment with alternative Cin and Cout combinations or a zener  
clamp on the enable input. See Figure 6 for corresponding  
schematic locations.  
30131501  
FIGURE 1. Evaluation Board Schematic  
(LMZ1200xEXT 1.8V application values shown in parentheses)  
© 2010 National Semiconductor Corporation  
301315  
www.national.com  
1234567...10

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