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LM317 其他数据使用手册 - SLKOR（韩国萨科微）
制造商:
SLKOR（韩国萨科微）
封装:
TO-220
描述:
输出类型：可调式 最大输入电压：40V 输出电压(可调)：1.2V ~ 37V
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
原理图在P1
封装尺寸在P6
电气规格在P2P4P5
导航目录
LM317数据手册
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Features
• Output current in excess of 1.5 ampere
• Output adjustable between 1.2V and 37V
• Internal thermal overload protection
• Internal short-circuit current limiting
constant with temperature
• Output transistor safe-area compensation
• Floating operation for high voltage applications
• Eliminates stocking many fixed voltages
1
1
Output
Rlimit
Input
Vadj
3
2
Voltage
Reference
Protection
Circuitry
+
--
Functional Block Diagram
V
in
V
out
C
in
0.1µF
LM317
C
o
1µF
I
ADJ
Adjust
R1
240Ω
R2
Maximum Ratings
Ratings at 25°C ambient temperature unless otherwise specified.
Parameter Symbol Value Unit
Input-Output Voltage Differential V
i
-V
o
40 Vdc
Junction-to-Case Thermal Resistance
R
θJC
3.0
°C
Power Dissipation, 25°C Case Temperature P
D
15 W
Operating Junction Temperature Range T
J
0 to +125 °C
Storage Junction Temperature Range T
stg
–65 to +150 °C
1. Adjust
2. V
out
3. V
in
Heatsink is connected to pin 2
Standard Application
Notes:
Cin is required if regulator is located an appreciable distance from power
supply filter.
Co is not needed for stability, however, it does improve transient response.
V
out
= 1.25V (1 + R
2
/R
1
) + I
Adj
R2
Since I
Adj
is controlled to less than 100µA, the error associated with this
term is negligible in most applications
3
2
TO-220
3-Terminal Adjustable Output Positive Voltage Regulators
LM317
1
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