Texas Instruments provides a recommended PCB layout in the LM25085 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.
The selection of the inductor depends on the output voltage, output current, and switching frequency. Texas Instruments provides an inductor selection guide in the LM25085 datasheet, which includes a table of recommended inductors for different output voltages and currents. Additionally, the inductor should have a low DC resistance and a high saturation current to minimize losses.
The maximum junction temperature of the LM25085AMMX/NOPB is 150°C. However, it's recommended to keep the junction temperature below 125°C for optimal reliability and performance. The device has a built-in thermal shutdown feature that turns off the device when the junction temperature exceeds 170°C.
To ensure EMC in your design, it's recommended to follow good PCB layout practices, such as keeping the switching node (SW) away from sensitive nodes, using a shielded inductor, and adding a common-mode choke to the input. Additionally, the LM25085 datasheet provides guidelines for EMI filtering and shielding.
The recommended input capacitor type is a low-ESR ceramic capacitor, such as an X5R or X7R dielectric. The value of the input capacitor depends on the input voltage and the output current. A general rule of thumb is to use a capacitor with a value of at least 10uF per amp of output current. The LM25085 datasheet provides more detailed guidelines for input capacitor selection.
Trust Checks
This model has been provided by community users.
Community Provided
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
LM25085AMMX/NOPB Overview
Use the download button to access the LM25085AMMX/NOPB schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like LM250,
or try a keyword search, such as Switching Regulator or Controllers
About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
