LM7909 PDF datasheet can download.
This product has 3-Terminal 1A Negative Voltage Regulator functions.
This is one of the semiconductor types. This part name is LM7909.
Manufacturers of the product is Fairchild Semiconductor.
Image and pinout :
Some of the text files within the PDF file
www.fairchildsemi.com MC79XX/MC79XXA/LM79XX 3-Terminal 1A Negative Voltage Regulator Features • Output Current in Excess of 1A • Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and 24V • Internal Thermal Overload Protection • Short Circuit Protection • Output Transistor Safe Operating Area Compensation
The MC79XX / MC79XXA/ LM79XX series of three terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. TO-220 Vin 1 1. GND 2. Input 3. Output Internal Block Digram GND R1 VOLTAGE REFERENCE R2 Output Out + Q1 Q2 PROTECTION CIRCUITRY Rsc I1 I2 Input In Rev. 1.0.1 ©2002 Fairchild Semiconductor Corporation MC79XX/MC79XXA/LM79XX Absolute Maximum Ratings Parameter Input Voltage Thermal Resistance Junction-Case (Note1) [ … ]
Please refer to the file for details.