Texas Instruments provides a recommended PCB layout in the LM25115 datasheet, which includes a thermal pad connected to a copper plane on the PCB to dissipate heat. Additionally, it's recommended to use a 2-ounce copper PCB and to keep the thermal pad away from other components to minimize thermal resistance.
To ensure the output voltage is stable and accurate, it's essential to follow the recommended input and output capacitor selection, as well as the PCB layout guidelines. Additionally, the input voltage should be within the recommended range, and the output voltage should be set using a resistive divider network with 1% tolerance resistors.
Although the datasheet specifies a maximum input voltage of 42V, it's recommended to limit the input voltage to 40V to ensure reliable operation and to prevent damage to the device.
The LM25115 has built-in overcurrent protection (OCP) and overtemperature protection (OTP). However, it's still recommended to add external protection components, such as a fuse or a current-sensing resistor, to prevent damage from excessive current or voltage. Additionally, ensure good airflow and a proper thermal design to prevent overheating.
Yes, the LM25115 is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard for automotive applications and is designed to meet the requirements of high-reliability systems. However, it's essential to follow the recommended design and testing guidelines to ensure the device meets the specific application requirements.
LM25115AMTX/NOPB datasheet
by Texas Instruments
