器件名称:
LM317
功能描述:
3-Terminal Adjustable Output Positive Voltage Regulators
文件大小:
118.31KB 共6页
简 介:
LM317 New Product Vishay formerly General 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. Input 3 Fun……