The recommended PCB layout for optimal thermal performance involves placing thermal vias under the IC, using a solid ground plane, and keeping the thermal traces as short and wide as possible. A 4-layer PCB with a dedicated thermal layer is also recommended.
To ensure the AP7115-28SEG-7 is properly biased, make sure to connect the EN pin to a stable voltage source, and the FB pin to a resistive divider network that sets the output voltage to the desired level. Also, ensure that the input voltage is within the recommended range.
The AP7115-28SEG-7 can drive a maximum capacitive load of 10uF. Exceeding this limit may cause instability or oscillations in the output voltage.
To protect the AP7115-28SEG-7 from overvoltage and undervoltage conditions, use a voltage supervisor or a voltage monitor IC to detect and respond to out-of-range input voltages. You can also add overvoltage protection (OVP) and undervoltage protection (UVP) circuits to the input stage.
The recommended input capacitor type is a low-ESR ceramic capacitor, such as an X5R or X7R type. The recommended value is 10uF to 22uF, depending on the input voltage and output current requirements.
AP7115-28SEG-7 datasheet
by Diodes Incorporated
