NTE1903 Integrated Circuit Negative 3 Terminal Voltage Regulator, 12V, 100mA Description: The NTE1903 is a negative 3terminal voltage regulator in a TO92 type package suitable for numerous applications requiring up to 100mA. This device features thermal shutdown and current limiting making the NTE1903 remarkably rugged. In most applications, no external components are required for operation. The NTE1903 is useful for oncard regulation or any other application where a regulated negative voltage at a modest current level is needed. This device offers a substantial advantage over the com- mon resistor/zener diode approach. Features: Internal ShortCircuit Current Limiting Internal Thermal Overload Protection No External Components Required Absolute Maximum Ratings: Input Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V I Internal Power Dissipation (Note 1), P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited D Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C opr Maximum Junction Temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +150C stg Lead Temperature (During Soldering, 10sec), T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C L Note 1. Thermal resistance, junctiontoambient is 180C/W when mounted with 0.4 leads on a PC board and 160C/W when mounted with .250 leads on a PC board. Electrical Characteristics: (V = 19V, I = 40mA, C = 0.33 F, C = 0.1 F, 0 T +125C, I O I O J Note 2 unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage V T = +25C 11.5 12.0 12.5 V O J 27V V 14.8V, 1mA I 100mA 11.4 12.0 12.6 V I O Line Regulation Reg T = +25C, 27V V 14.6V 45 mV line J IElectrical Characteristics (Contd): (V = 19V, I = 40mA, C = 0.33 F, C = 0.1 F, I O I O 0 T +125C, Note 2 unless otherwise specified) J Parameter Symbol Test Conditions Min Typ Max Unit Load Regulation Reg T = +25C, 1mA I 100mA 100 mV load J O Quiescent Current I I = 100mA 2 6 mA B O Quiescent Current Change I With line, 27V V 14.8V 0.25 mA B I With load, 1mA I 40mA 0.1 mA O Output Noise Voltage V T = +25C, f = 10Hz to 10kHz 96 V n J Ripple Rejection RR 25V V 15V, f = 120Hz 52 dB I Input Voltage Required to TCV T = +25C 14.5 V O J Maintain Line Regulation Note 2. To ensure constant junction temperature, low duty cycle pulse testing is used. .135 (3.45) Min .210 Seating Plane (5.33) Max .500 (12.7) .021 (.445) Dia Max Min GND V OUT V IN .100 (2.54) .050 (1.27) .105 (2.67) Max .165 (4.2) Max .205 (5.2) Max .105 (2.67) Max