MC7918

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 Description 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) Thermal Resistance Junction-Air (Note1, 2) Operating Temperature Range Storage Temperature Range Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Symbol VI RθJC RθJA TOPR TSTG Value -35 5 65 0 ~ +125 -65 ~ +150 Unit V °C/W °C °C Electrical Characteristics (MC7905/LM7905) (VI = -10V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.) Parameter Output Voltage Symbol TJ = +25°C VO IO = 5m...