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LM7812A Datasheet(PDF) 20 Page - Fairchild Semiconductor |
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LM7812A Datasheet(HTML) 20 Page - Fairchild Semiconductor |
20 / 28 page LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE) LM7818A/RA ELECTRICAL CHARACTERISTICS (Refer to the test circuits. TJ = 0 to +150 °C, I O=1A, V I = 27V, C I= 0.33 µF, C O = 0.1 µF, unless otherwise specified) * Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. Characteristic Symbol Test Conditions Min Typ Max Unit TJ =+25 °C 17.64 18 18.36 Output Voltage VO IO = 5mA to 1A, PD ≤15W VI = 21 to 33V 17.3 18 18.7 V VI= 21 to 33V IO = 500mA 15 180 Line Regulation ∆V O VI= 21 to 33V 5 180 mV VI= 20.6V to 33V 15 180 VI= 24V to 30V 5 90 TJ =+25 °C IO = 5mA to 1.5A 15 100 IO = 5mA to 1.0A 15 100 IO = 250 to 750mA 7 50 Quiescent Current IQ TJ =+25 °C 5.2 6.0 mA VI = 21V to 33V, TJ=+25 °C 0.5 Quiescent Current Change ∆I Q VI = 21V to 33V, IO = 500mA 0.8 mA IO = 5mA to 1.0A 0.8 Output Voltage Drift ∆V O/ ∆T IO = 5mA -1.0 mV/ °C Output Noise Voltage VN f = 10Hz to 100KHz TA =+25 °C 10 Ripple Rejection RR f = 120Hz, IO = 500mA VI = 18.5V to 28.5V 57 dB Dropout Voltage VD IO = 1A, TJ =+25 °C 2.0 V Output Resistance RO f = 1KHz 19 m Ω Short Circuit Current ISC VI= 35V, TA =+25 °C 250 mA Peak Current IPK TJ=+25 °C 2.2 A Load Regulation ∆V O TJ =+25 °C µV/V O mV |
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