Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer and a thermal relief pattern on the top layer to ensure good thermal conductivity. A thermal pad on the bottom of the device should be connected to the ground plane.
To ensure reliable start-up, it is recommended to use a soft-start circuit to limit the inrush current and prevent voltage drops on the input supply. Additionally, a capacitor with a low equivalent series resistance (ESR) should be used at the output to filter out noise and ripple.
The LMZ10500SHX/NOPB can tolerate input voltage ripple up to 10% of the nominal input voltage, but it is recommended to keep the ripple below 5% to ensure stable operation and minimize output voltage noise.
The LMZ10500SHX/NOPB is rated for operation up to 125°C, but it is recommended to derate the output current and input voltage to ensure reliable operation at high temperatures. Additionally, a heat sink may be required to keep the device within its thermal limits.
To troubleshoot output voltage errors or instability, check the input voltage, output current, and output voltage ripple. Ensure that the input voltage is within the recommended range, and the output current is within the specified limit. Also, check for any noise or interference on the input or output lines.
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