NTE999 General Description
The NTE999 is a threeterminal adjustable shunt regulator with guaranteed thermal stability over a temperature range of 0° to +70°C. The output voltage may be set to any value between Vref (approxi-mately 2.5V) and 36V with two external resistors. This device has a typical dynamic output imped-ance of 0.2Ω. Active output circuitry provides a very sharp turnon characteristic, making the NTE999 an excellent replacement for zener diodes in many applications.
NTE999 Maximum Ratings
Cathode Voltage (Note 1), VKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37V
Continuous Cathode Current Range, IK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA to 150mA
Reference Input Current Range, Iref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50µA to 10mA
Continuous Power Dissipation, PD
Up to +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 775mW
Derate Above +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2mW/°C
Operating Ambient Temperature Range, Topr. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65° to +150°C
Lead Soldering Temperature (.0625 (1.6mm) from case for 10s), TL . . . . . . . . . . . .. . . . . . . . . . . 260°C
NTE999 Features
Equivalent FullRange Temperature Coefficient: 30ppm/°C Typ
Adjustable Output Voltage
Fast TurnOn Response
Sink Current Capability: 1mA to 100mA
Low Dynamic Output Impedance: 0.2Ω Typ
Low Output Noise Voltage
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