1a low dropout regulator lm2940 national semiconductor lm2940ct 50nopb low dropout positive fixed voltage regulator 5v output voltage 05v dropout voltage single output 1a output current 625v to 26v supply voltage 0 to 125c to 220 case output voltage trimmed before assembly reverse battery protection internal short circuit current limit mirror image insertion protection p product enhancement tested designed for vehicular applications supplied in rail of 45 national semico