NTE1903 Integrated Circuit Negative 3 Terminal Voltage Regulator, –12V, 100mA Description: The NTE1903 is a negative 3–terminal 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 on–card 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 common resistor/zener diode approach. Features: D Internal Short–Circuit Current Limiting D Internal Thermal Overload Protection D No External Components Required Absolute Maximum Ratings: Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –35V Internal Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Operating Junction Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Maximum Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Note 1. Thermal resistance, junction–to–ambient is 180°C/W when mounted with 0.4” leads on a PC board and 160°C/W when mounted with .250” leads on a PC board. Electrical Characteristics: (VI = –19V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0° ≤ TJ ≤ +125°C, Note 2 unless otherwise specified) Parameter Output Voltage Line Regulation Symbol VO Regline Test Conditions Min Typ Max Unit TJ = +25°C –11.5 –12.0 –12.5 V –27V ≤ VI ≤ –14.8V, 1mA ≤ IO ≤ 100mA –11.4 –12.0 –12.6 V – – 45 mV TJ = +25°C, –27V ≤ VI ≤ –14.6V Electrical Characteristics (Cont’d): (VI = –19V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0° ≤ TJ ≤ +125°C, Note 2 unless otherwise specified) Parameter Symbol Load Regulation Regload Quiescent Current IB ∆IB Quiescent Current Change Test Conditions Min Typ Max Unit TJ = +25°C, 1mA ≤ IO ≤ 100mA – – 100 mV IO = 100mA – 2 6 mA With line, –27V ≤ VI ≤ –14.8V – – 0.25 mA With load, 1mA ≤ IO ≤ 40mA – – 0.1 mA Output Noise Voltage Vn TJ = +25°C, f = 10Hz to 10kHz – 96 – µV Ripple Rejection RR –25V ≤ VI ≤ –15V, f = 120Hz 52 – – dB TJ = +25°C – – –14.5 V Input Voltage Required to Maintain Line Regulation TCVO Note 2. To ensure constant junction temperature, low duty cycle pulse testing is used. .135 (3.45) Min .210 (5.33) Max Seating Plane .500 (12.7) Min .021 (.445) Dia Max GND VOUT VIN .100 (2.54) .050 (1.27) .105 (2.67) Max .205 (5.2) Max .165 (4.2) Max .105 (2.67) Max