Texas Instruments provides a recommended PCB layout for the LM3280TL-275/NOPB in the datasheet, but it's also recommended to follow general guidelines for thermal management, such as using a solid ground plane, placing thermal vias under the device, and keeping the PCB layer stack-up symmetrical.
To ensure accurate and stable output voltage, it's essential to follow the recommended input and output capacitor values, as well as the recommended layout guidelines. Additionally, the input voltage should be well-regulated, and the output should be decoupled with a low-ESR capacitor.
Although the datasheet specifies a maximum input voltage of 15V, it's recommended to limit the input voltage to 12V to ensure reliable operation and to prevent damage to the device.
The LM3280TL-275/NOPB is rated for operation up to 125°C, but it's essential to consider the thermal derating of the device and the PCB when operating in high-temperature environments. Additionally, the device's performance and reliability may be affected at high temperatures.
To troubleshoot issues with the output voltage or current, start by verifying the input voltage and current, then check the output voltage and current using a multimeter or oscilloscope. Also, ensure that the output is properly decoupled and that the PCB layout is correct.
LM3280TL-275/NOPB datasheet
by Texas Instruments
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