7808 Three-terminal positive voltage regulator TO-220 1. IN 2. GND 3. OUT Features 1 2 3 Maximum Output current IOM: 1.5 A Output voltage Vo: 8 V Continuous total dissipation 2 W (Ta= 25 ℃) PD: 15W (Tc=25 ℃) Dimensions in inches and (millimeters) ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Parameter Symbol Input Voltage Value Vi Unit 35 V Thermal resistance junction-air RθJA 65 ℃/W Thermal resistance junction-cases RθJC 5 ℃/W Operating Junction Temperature Range TOPR 0-125 ℃ TSTG -65-150 ℃ Storage Temperature Range ELECTRICAL CHARACTERISTICS (Vi=14V,Io=500mA, Ci=0.33μF, Co=0.1μF, unless otherwise specified ) Parameter Output voltage Load Regulation Line regulation Quiescent Current Quiescent Current Change Output voltage drift Symbol Vo Test conditions 10.5V≤V i≤23V, Io=5mA-1A, P≤15W ∆Vo ∆Vo ∆VO/∆T TYP MAX UNIT 25℃ 7.7 8 8.3 V 0-125℃ 7.6 8 8.4 V Io=5mA-1.5A 25℃ 12 160 mV Io=250mA-750mA 25℃ 4 80 mV 10.5V≤V i≤25V 25℃ 6 160 mV 11V≤V i≤17V 25℃ 2 80 mV 25℃ 4.3 8 mA Iq ∆Iq MIN 10.5V≤V i≤25V 0-125℃ 1 mA 5mA≤IO≤1A 0-125℃ 0.5 mA IO=5mA 0-125℃ -0.8 mV/℃ 25℃ 52 uV 72 dB Output Noise Voltage VN 10Hz≤f≤100KHz Ripple Rejection RR 11.5V≤V i≤21.5V,f=120Hz Dropout Voltage Vd Io=1A 25℃ 2 V Output resistance RO f=1KHZ 25℃ 10 mΩ Short Circuit Current Isc 25℃ 450 mA Peak Current Ipk 25℃ 2.2 A TYPICAL APPLICATION Vi 1 0-125℃ 3 Vo 7808 UTC 2 Ci 0.33μF Co 0.1μF 55 7808 Three-terminal positive voltage regulator Typical Characteristics