MC7912C

DATA SHEET www.onsemi.com Negative Voltage Regulators 1.0 A TO−220 T SUFFIX CASE 221AB MC7900 Series The MC7900 series of fixed output negative voltage regulators are intended as complements to the popular MC7800 series devices. These negative regulators are available in the same seven−voltage options as the MC7800 devices. In addition, one extra voltage option commonly employed in MECL systems is also available in the negative MC7900 series. Available in fixed output voltage options from − 5.0 V to − 24 V, these regulators employ current limiting, thermal shutdown, and safe−area compensation − making them remarkably rugged under most operating conditions. With adequate heatsinking they can deliver output currents in excess of 1.0 A. No External Components Required Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe−Area Compensation Available in 2% Voltage Tolerance (See Ordering Information) Pb−Free Package May be Available. The G−Suffix Denotes a Pb−Free Lead Finish Heatsink surface connected to Pin 2. 1 2 3 Pin 1. Ground 2. Input 3. Output D2PAK D2T SUFFIX CASE 936 12 3 Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. STANDARD APPLICATION Input Cin* 0.33 mF MC79XX Output CO** 1.0 mF 2.0 k 25 2.4 k 14.7 k 2.0 k 8.0 k Gnd A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above more negative e...