The LR8N8-G is a 3-terminal high voltage low output current Adjustable Linear Regulator features wide operating input voltage range of 13.2 to 450V. The output voltage can be adjusted from 1.20 to 440V provided that the input voltage is at least 12V greater than the output voltage. The output voltage can be adjusted by means of two external resistors R1 and R2. The LR8 regulates the voltage difference between VOUT and ADJ pins to a nominal value of 1.2V. The 1.2V is amplified by the external resistor ratio R1 and R2. An internal constant bias current of typically 10μA is connected to the ADJ pin. This increases VOUT by a constant voltage of 10μA times R2. The LR8 has current limiting and temperature limiting. The output current limit is typically 20mA and the minimum temperature limit is 125°C. An output short-circuit current will therefore be limited to 20mA.
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