Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for power management ICs, such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise.
To ensure stability, make sure to follow the recommended component values and PCB layout, and also consider the output capacitor's ESR (Equivalent Series Resistance) and ESL (Equivalent Series Inductance) when selecting the capacitor. Additionally, the datasheet provides a stability analysis section that can help with this.
The maximum input voltage rating for the LP38869MHE/NOPB is 15V, but it's recommended to operate the device within the recommended input voltage range of 6.5V to 12V for optimal performance and reliability.
The LP38869MHE/NOPB is rated for operation up to 125°C, but it's essential to consider the device's power dissipation and thermal management when operating in high-temperature environments. Make sure to follow the recommended thermal design and layout guidelines to ensure reliable operation.
Start by checking the input voltage, output voltage, and current consumption using an oscilloscope or multimeter. Verify that the device is properly soldered and that the PCB layout follows the recommended guidelines. Check for any signs of overheating, such as excessive temperature rise or thermal shutdown. Consult the datasheet and application notes for troubleshooting guides and FAQs.
LP38869MHE/NOPB datasheet
by Texas Instruments
