参数资料
型号: LT3684IDD#PBF
厂商: Linear Technology
文件页数: 18/24页
文件大小: 0K
描述: IC REG BUCK ADJ 2A 10DFN
标准包装: 121
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 1.27 V ~ 20 V
输入电压: 3.6 V ~ 34 V
PWM 型: 电流模式
频率 - 开关: 300kHz ~ 3MHz
电流 - 输出: 2A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 10-DFN(3x3)
产品目录页面: 1332 (CN2011-ZH PDF)
LT3684
APPLICATIONS INFORMATION
CLOSING SWITCH
DANGER
SIMULATES HOT PLUG
I IN
V IN
LT3684
V IN
20V/DIV
RINGING V IN MAY EXCEED
+
4.7 μ F
ABSOLUTE MAXIMUM RATING
LOW
IMPEDANCE
ENERGIZED
24V SUPPLY
+
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
0.7 ?
0.1 μ F
LT3684
4.7 μ F
LT3684
I IN
10A/DIV
(9a)
V IN
20V/DIV
I IN
10A/DIV
(9b)
V IN
20V/DIV
20 μ s/DIV
20 μ s/DIV
+
22 μ F
35V
+
4.7 μ F
AI.EI.
I IN
10A/DIV
(9c)
20 μ s/DIV
3684 F09
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
temperature approaches 125°C.
Power dissipation within the LT3684 can be estimated by
calculating the total power loss from an ef?ciency measure-
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.
Other Linear Technology Publications
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.
3684f
18
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