器件名称: LM317CT
功能描述: 3-Terminal Adjustable Output Positive Voltage Regulators
文件大小: 123.23KB 共6页
简 介:LM317CM & LM317CT
New Product
Vishay Semiconductor
3-Terminal Adjustable Output Positive Voltage Regulators
Pin Arrangement TO-263
(LM317CM)
2 3 3 1 1. Adjust 2. Vout 3. Vin
Heatsink is connected to pin 2
Description
The LM317 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5A over an output voltage range of 1.2V to 37V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow-out proof.
TO-220
(LM317CT)
1
2
Features
Output current in excess of 1.5 ampere Output adjustable between 1.2V and 37V
Standard Application
Vin Vout
LM317
Cin 0.1F IADJ R1 Adjust 240 R2 Co 1F
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
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. Vout = 1.25V (1 + R2 / R1) + IAdj R2 Since IAdj is controlled to less than 100A, the error associated with this term is negligible in most applications
Mechanical Data
Case: TO-220 and TO-263 packages Weight: approx. 1.35g Case outlines are on the back page.
Functional Block ……
