Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer to improve thermal performance. The device should be placed near a thermal pad or a heat sink to dissipate heat efficiently.
To ensure reliable start-up and shutdown, it is recommended to add a soft-start circuit to limit the inrush current during start-up. Additionally, a voltage supervisor or a reset IC can be used to ensure a clean shutdown and prevent damage to the device.
The maximum output current capability of the PT6937A is dependent on the input voltage, output voltage, and thermal conditions. However, as a general guideline, the device can deliver up to 3A of output current with a suitable heat sink and proper thermal design.
To optimize the PT6937A for low standby power consumption, it is recommended to use a low-quiescent-current controller, such as the PT6937A-33, and to minimize the input voltage to the device. Additionally, the enable pin can be used to shut down the device during standby mode to reduce power consumption.
Texas Instruments recommends using X5R or X7R ceramic capacitors with a minimum capacitance of 10uF for the input and output capacitors. The capacitors should be placed as close as possible to the device to minimize parasitic inductance and ensure stable operation.
PT6937A datasheet
by Texas Instruments
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