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LCVT 参数 Datasheet PDF下载

LCVT图片预览
型号: LCVT
PDF下载: 下载PDF文件 查看货源
内容描述: 36V ,2A , 2.8MHz降压型开关稳压器 [36V, 2A, 2.8MHz Step-Down Switching Regulator]
分类和应用: 稳压器开关
文件页数/大小: 24 页 / 327 K
品牌: Linear [ Linear ]
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LT3684  
APPLICATIONS INFORMATION  
CLOSING SWITCH  
DANGER  
SIMULATES HOT PLUG  
V
IN  
I
IN  
20V/DIV  
V
IN  
RINGING V MAY EXCEED  
LT3684  
4.7µF  
IN  
ABSOLUTE MAXIMUM RATING  
+
I
IN  
LOW  
STRAY  
10A/DIV  
IMPEDANCE  
ENERGIZED  
24V SUPPLY  
INDUCTANCE  
DUE TO 6 FEET  
(2 METERS) OF  
TWISTED PAIR  
20µs/DIV  
(9a)  
0.7Ω  
V
IN  
20V/DIV  
LT3684  
4.7µF  
+
0.1µF  
I
IN  
10A/DIV  
20µs/DIV  
(9b)  
V
IN  
20V/DIV  
LT3684  
4.7µF  
+
+
22µF  
35V  
AI.EI.  
I
IN  
10A/DIV  
3684 F09  
20µs/DIV  
(9c)  
Figure 9. A Well Chosen Input Network Prevents Input Voltage Overshoot and  
Ensures Reliable Operation when the LT3684 is Connected to a Live Supply  
maximum load current should be derated as the ambient  
Other Linear Technology Publications  
temperature approaches 125°C.  
Application Notes 19, 35 and 44 contain more detailed  
descriptions and design information for buck regulators  
and other switching regulators. The LT1376 data sheet  
has a more extensive discussion of output ripple, loop  
compensation and stability testing. Design Note 100  
shows how to generate a bipolar output supply using a  
buck regulator.  
Power dissipation within the LT3684 can be estimated by  
calculatingthetotalpowerlossfromanefficiencymeasure-  
ment and subtracting the catch diode loss and inductor  
loss. The die temperature is calculated by multiplying the  
LT3684 power dissipation by the thermal resistance from  
junction to ambient.  
3684f  
18  
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