A recommended PCB layout for optimal thermal performance would be to have a solid ground plane on the bottom layer, and to use thermal vias to connect the exposed pad to the ground plane. This helps to dissipate heat efficiently.
To ensure the stability of the output voltage, it's recommended to use a minimum output capacitance of 10uF, and to choose a capacitor with a low ESR (Equivalent Series Resistance) to minimize voltage ripple.
Although the datasheet specifies a maximum input voltage of 5.5V, it's recommended to limit the input voltage to 5V to ensure reliable operation and to prevent damage to the device.
While the AP1682EMTR-G1 is rated for operation up to 125°C, it's recommended to derate the output current and input voltage to ensure reliable operation in high-temperature environments.
The power dissipation of the AP1682EMTR-G1 can be calculated using the formula: Pd = (Vin - Vout) x Iout + (Vin x Iq), where Vin is the input voltage, Vout is the output voltage, Iout is the output current, and Iq is the quiescent current.