去tb买东西顺便带了两个凌力尔特的LT1083三端稳压器回来，今天无聊翻出来利用下。。。
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Three-Terminal Adjustable
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Output Current of 3A, 5A or 7.5A
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Operates Down to 1V Dropout
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Guaranteed Dropout Voltage at Multiple Current Levels
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Line Regulation: 0.015%
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Load Regulation: 0.1%
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100% Thermal Limit Functional Test
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Fixed Versions Available
最大电流7.5A，最低压差达1V,有短路保护，线性调整率 0.015% 满载调整率 0.1%
可以看成是高性能的LM317
ps，这个7.5A最大电流只能在压降在2-3V时才可能实现，再高功率耗散太大就烧管子了
The LT®
1083 series of positive adjustable regulators are
designed to provide 7.5A, 5A and 3A with higher efficiency
than currently available devices. All internal circuitry is
designed to operate down to 1V input-to-output differen-
tial and the dropout voltage is fully specified as a function
of load current. Dropout is guaranteed at a maximum of
1.5V at maximum output current, decreasing at lower load
currents. On-chip trimming adjusts the reference voltage
to 1%. Current limit is also trimmed, minimizing the stress
on both the regulator and power source circuitry under
overload conditions.
The LT1083/LT1084/LT1085 devices are pin compatible
with older three-terminal regulators. A 10
μ
F output ca-
pacitor is required on these new devices. However, this is
included in most regulator designs.
Unlike PNP regulators, where up to 10% of the output
current is wasted as quiescent current, the LT1083 quies-
cent current flows into the load, increasing efficiency.
比单独PNP调整管要高效率点，静态电流小点。。。。。
不过这样的线性稳压器压差越大效率越低。
例如输入15V输出5V 电流2A的时候功率耗散都有20W了，效率才33.3333%
所以好点的散热是必不可少的
防反流的1N4007，安森美产的
弄上去，由于电路比较简单就直接搭棚了。。。。。。。。。
100欧1%j金属膜电阻
山寨BROUNS电位器（减速电位器）
5K
电位器底下藏着个104的陶瓷电容，是ADJ端到地的
输出滤波小了点，只是先试试
测试环节，输入5V,输出3.76V，压降1.24V
调整精度不错，0.01V稳定可调
