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Electrical Characteristics (Continued) V IN =VO + 5V, IO = 1A, CO = 22 µF, unless otherwise specified. Boldface limits apply over the entire operating tempera- ture range of the indicated device. All other specifications apply for T A =TJ = 25˚C. Output Voltage (V O) 9V 10V Units Parameter Conditions Typ LM2940 Typ LM2940 Limit Limit Short Circuit 1.9 1.6 1.9 1.6 A MIN Current Maximum Line R O = 100 Ω Transient T ≤ 100 ms LM2940 75 60/60 75 60/60 V MIN LM2940C 55 45 Reverse Polarity R O = 100 Ω DC Input Voltage LM2940 −30 −15/−15 −30 −15/−15 V MIN LM2940C −30 −15 Reverse Polarity R O = 100 Ω Transient Input T ≤ 100 ms Voltage LM2940 −75 −50/−50 −75 −50/−50 V MIN LM2940C −55 −45/−45 Electrical Characteristics V IN =VO + 5V, IO = 1A, CO = 22 µF, unless otherwise specified. Boldface limits apply over the entire operating tempera- ture range of the indicated device. All other specifications apply for T A =TJ = 25˚C. Output Voltage (V O) 12V 15V Units LM2940 LM2940/833 LM2940 LM2940/833 Parameter Conditions Typ Limit Limit Typ Limit Limit 13.6V ≤ V IN ≤ 26V 16.75V ≤ V IN ≤ 26V Output Voltage 5 mA ≤ I O ≤1A 12.00 11.64/11.40 11.64/11.40 15.00 14.55/14.25 14.55/14.25 V MIN 12.36/12.60 12.36/12.60 15.45/15.75 15.45/15.75 V MAX Line Regulation V O +2V ≤ V IN ≤ 26V, 20 120 75/120 20 150 95/150 mV MAX I O =5 mA Load Regulation 50 mA ≤ I O ≤ 1A LM2940, LM2940/883 55 120/200 120/190 150/240 mV MAX LM2940C 55 120 70 150 Output 100 mADC and Impedance 20 mArms, 80 1000/1000 100 1000/1000 m Ω f O = 120 Hz Quiescent Current V O +2V ≤ V IN ≤ 26V, I O =5 mA LM2940, LM2940/883 10 15/20 15/20 15/20 mA MAX LM2940C 10 15 10 15 V IN =VO + 5V, IO = 1A 30 45/60 50/60 30 45/60 50/60 mA MAX Output Noise 10 Hz − 100 kHz, 360 1000/1000 450 1000/1000 µV rms Voltage I O =5 mA Ripple Rejection f O = 120 Hz, 1 Vrms, I O = 100 mA LM2940 66 54/48 dB MIN LM2940C 66 54 64 52 f O = 1 kHz, 1 Vrms, 52/46 48/42 dB MIN I O =5 mA www.national.com 6 |
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