A good PCB layout for the MCL103B-TR3 should consider the following: keep the input and output traces separate, use a ground plane, and minimize the distance between the device and the bypass capacitors. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
To ensure the MCL103B-TR3 operates within the specified temperature range, provide adequate heat sinking, avoid overheating, and keep the device away from high-temperature sources. The device's thermal resistance (θJA) is 125°C/W, so a heat sink with a thermal resistance of 10°C/W or lower is recommended.
The recommended input capacitor value is 10uF to 22uF, with a voltage rating of 25V or higher. A low-ESR ceramic capacitor, such as X5R or X7R, is recommended to minimize voltage ripple and ensure stable operation.
During power-up, the enable pin (EN) should be held low until the input voltage reaches the minimum operating voltage (VIN(min)). During power-down, the enable pin should be held low until the input voltage falls below VIN(min). This ensures proper device operation and prevents unwanted switching.
The maximum allowed output current for the MCL103B-TR3 is 3A. Exceeding this current may cause the device to overheat, leading to reduced performance or even damage.
MCL103B-TR3 datasheet
by Vishay Semiconductors
