LM7818

LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE) 3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS The LM78XX series of three-terminal positive regulators are available in the TO-220/D-PAK 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 area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. TO-220 D-PAK FEATURES • • • • • Output Current up to 1A Output Voltages of 5, 6, 8, 9, 10, 11, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Output Transistor SOA Protection 1 1: Input 2: GND 3: Output ORDERING INFORMATION Device KA78XXCT KA78XXAT KA78XXIT KA78XXR KA78XXAR KA78XXIR Output Voltage Tolerance ± 4% ± 2% ± 4% ± 2% ± 4% D-PAK Packag e TO-220 Operating Temperature 0 ~ +125 °C -40 ~ +125 °C 0 ~ +125 °C -40 ~ +125 °C BLOCK DIAGRAM Rev. B © 1999 Fairchild Semiconductor Corporation LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE) ABSOLUTE MAXIMUM RATINGS (TA = +25°C, unless otherwise specified) Characteristic Input Voltage (for VO = 5V to 18V) (for VO = 24V) Thermal Resistance Junction-Cases Thermal Resistance Junction-Air Operating Temperature Range KA78XX/A/R/RA KA78XXI/RI Storage Temperature Range Symbol VI VI RθJC RθJA TOPR TSTG Value 35 40 5 65 0 ~ +125 -40 ~ +125 -65 ~ +150 Unit V V °C/W °C/W °C °C °C LM7805/I/R/RI ELECTRICAL CHARACTERISTICS (Refer to test circuit, TMIN < TJ < TMAX, IO = 500mA, VI = 10V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified) Characteristic Symbol Test Conditions TJ =+25 °C Output Voltage VO 5.0mA ≤ IO ≤1.0A, PO ≤ 15W VI = 7V to 20V VI = 8V to 20V VO = 7V to 25V TJ=+25°C VI = 8V to 12V TJ=+25°C IO = 5.0mA to1.5A IO =250mA to 750mA LM7805I LM7805 Min Typ Max Min Typ Max 4.8 5.0 5.2 4.8 5.0 5.2 4.75 5.0 5.25 4.75 5.0 5.25 4.0 1.6 9 4 5.0 100 50 100 50 8 4.0 1.6 9 4 5.0 100 50 100 50 8 mV mV mA mA mV/ °C µV/Vo dB V mΩ mA A Unit V Line Regulation Load Regulation Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current ∆VO ∆VO IQ ∆IQ ∆VO/∆T VN RR VO RO ISC IPK TJ =+25 °C IO = 5mA to 1.0A VI= 7V to 25V VI= 8V to 25V IO= 5mA f = 10Hz to 100Khz, TA=+25 °C f = 120Hz VO = 8 to 18V IO = 1A, TJ =+25 °C f = 1KHz VI = 35V, TA =+25 °C TJ =+25 °C 0.03 0.5 0.3 -0.8 42 62 73 2 15 230 2.2 62 1.3 0.03 0.5 0.3 1.3 -0.8 42 73 2 15 230 2.2 * TMIN