The recommended PCB layout for optimal thermal performance involves placing the device on a thermal pad with multiple vias to the ground plane, and keeping the thermal pad as large as possible. Additionally, it's recommended to use a 2-3 layer PCB with a solid ground plane to reduce thermal resistance.
To ensure stable output voltage with varying input voltage, it's recommended to use a capacitor with a high ripple current rating at the input, and to decouple the output with a capacitor of at least 10uF. Additionally, the output voltage can be adjusted using the feedback resistors to maintain a stable output voltage.
The maximum ambient temperature for reliable operation of the AP2181DWG-7 is 85°C. However, it's recommended to derate the device's power dissipation at higher temperatures to ensure reliable operation.
To protect the device from overvoltage and undervoltage conditions, it's recommended to use a voltage supervisor or a voltage monitor IC to detect and respond to voltage faults. Additionally, a TVS diode can be used to protect the device from voltage transients.
The recommended input capacitor type is a ceramic capacitor with an X7R or X5R dielectric, and a value of at least 10uF. The capacitor should be rated for the maximum input voltage and have a low ESR to minimize voltage ripple.
AP2181DWG-7 datasheet
by Diodes Incorporated
