A good PCB layout for the REF3220AMDBVREP involves keeping the input and output traces short and separate, using a solid ground plane, and placing the device close to the power supply. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure proper decoupling, place a 10uF ceramic capacitor between the VIN pin and the GND pin, and a 100nF ceramic capacitor between the VOUT pin and the GND pin. Additionally, use a 1uF ceramic capacitor between the VIN pin and the VOUT pin.
The REF3220AMDBVREP can deliver up to 50mA of output current. However, it's recommended to limit the output current to 30mA to ensure optimal performance and to prevent overheating.
The output voltage of the REF3220AMDBVREP can be adjusted by using an external resistor divider network between the VOUT pin and the ADJ pin. The output voltage can be calculated using the formula: VOUT = 2.5V x (1 + R1/R2), where R1 and R2 are the resistors in the divider network.
The REF3220AMDBVREP has a thermal shutdown temperature of 150°C. If the device temperature exceeds this limit, it will shut down to prevent damage.
REF3220AMDBVREP datasheet
by Texas Instruments
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