DC2072A

Demonstration circuit 2072A is an adjustable 500mA linear regulator featuring the LT®3065. The LT3065 is a micropower, low noise and low dropout voltage linear regulator. The device supplies 500mA of output current with a typical dropout voltage of 300mV. A 10nF bypass capacitor reduces output noise to 25µVRMS in a 10Hz to 100KHz bandwidth and soft-starts the reference. The LT3065’s ±45V input voltage rating combined with its precision current limit make the IC an ideal choice for robust, high reliability applications. LT3065 current limit can be programmed by a single resistor, accurate to ±10% over a wide input voltage and temperature range. The internal current limit should be considered when the input-to-output differential is high. The LT3065 has a PWRGD pin, which becomes high when the output rises above 90% of its nominal value. If the output falls below 88.4% of its nominal value for more than 25µs, the PWRGD pin asserts low.

• Input voltage range from 5.35V to 45V at VOUT = 5V
• Typical output voltage VOUT of 1.2V (header in JP1)
• Maximum output current of 495mA (typ) at VIN = 6V, VOUT = 5V, R10 = 604 ohm

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