Datasheet Microchip LR8K4-G

LR8
High-Input Voltage, Adjustable, 3-Terminal,
Linear Regulator
Features General Description •
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• LR8 is a high-voltage, low-output current, adjustable
linear regulator. This regulator has a wide operating
input voltage range of 13.2-450V. The output voltage
can be adjusted from 1.20-438V, 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, as shown in the typical
application circuits. LR8 regulates the voltage difference between VOUT and ADJ pins to a nominal value of
1.20V. The 1.20V is amplified by the external resistor
ratio R1 and R2. An internal constant bias current, of
typically 10 µA, is connected to the ADJ pin. This
increases VOUT by a constant voltage of 10 µA times
R2. 13.2-450V Input Voltage Range
Adjustable 1.20-438V Output Regulation
5% Output Voltage Tolerance …