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 keep the input and output capacitors close to the device to minimize parasitic inductance.
To ensure stability and prevent oscillations, it's essential to follow the recommended component values and layout guidelines in the datasheet. Additionally, it's recommended to add a small ceramic capacitor (e.g., 10nF) between the VIN pin and the GND pin to filter out high-frequency noise.
Although the datasheet specifies a maximum input voltage of 18V, it's recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the device.
The AP2181DFMG-7 is rated for operation up to 125°C, but it's essential to consider the derating curves in the datasheet to ensure reliable operation at high temperatures. Additionally, it's recommended to use a heat sink or thermal pad to dissipate heat and prevent thermal shutdown.
The output voltage ripple of the AP2181DFMG-7 can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.
AP2181DFMG-7 datasheet
by Diodes Incorporated
