Torex recommends a compact PCB layout with short traces and minimal vias to reduce parasitic inductance and capacitance. A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Additionally, place decoupling capacitors close to the IC and use a common ground point for the input and output capacitors.
To ensure stability, use a minimum output capacitance of 1uF with an ESR of 100mΩ or less. Additionally, place a 10nF ceramic capacitor in parallel with the output capacitor to improve high-frequency stability. Avoid using tantalum or electrolytic capacitors as they may cause oscillation.
Although the datasheet specifies a maximum input voltage of 6.5V, Torex recommends limiting the input voltage to 6.0V to ensure reliable operation and prevent damage to the internal circuitry.
While XCL222B2L1ER-G is rated for operation up to 105°C, Torex recommends derating the output current by 50% when operating above 85°C to ensure reliable operation and prevent thermal shutdown.
Start by verifying the input voltage, output load, and PCB layout. Check for proper decoupling, correct component values, and minimal parasitic inductance. Use an oscilloscope to measure the output voltage and current, and check for signs of oscillation or ringing. Consult the datasheet and application notes for troubleshooting guidelines and contact Torex support if necessary.
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