Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general guidelines for switching regulator layout, such as keeping the input and output capacitors close to the IC, and using a solid ground plane to reduce noise and EMI.
The output voltage ripple of the UA7810CKCSE3 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. The datasheet provides a graph to estimate the output voltage ripple based on the output capacitance and switching frequency.
The UA7810CKCSE3 has an absolute maximum input voltage rating of 18V, but the recommended maximum input voltage is 15V to ensure reliable operation and to prevent damage to the internal components.
The UA7810CKCSE3 has an operating junction temperature range of -40°C to 125°C, but the device's performance and reliability may degrade at high temperatures. It's recommended to follow the thermal design guidelines in the datasheet and to use a heat sink or thermal management system to keep the junction temperature below 100°C.
To ensure stability, follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, make sure to use a sufficient output capacitance and to add a small ceramic capacitor (e.g., 10nF) between the output and ground pins to filter out high-frequency noise.
UA7810CKCSE3 datasheet
by Texas Instruments
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