A 2-layer or 4-layer PCB with a solid ground plane and thermal vias under the device can help to dissipate heat efficiently. It's also recommended to keep the thermal path short and direct to the heat sink or thermal pad.
The device requires a stable input voltage and a proper biasing network to ensure optimal performance. A recommended biasing network includes a voltage divider and a decoupling capacitor to filter out noise and ensure a stable output voltage.
The maximum output current capability of the TPS40075RHLT is 3A. However, the actual output current capability may be limited by the thermal performance of the device and the PCB design.
The device has built-in overvoltage protection (OVP) and undervoltage lockout (UVLO) features. However, additional protection circuits may be required to protect the device from voltage transients and spikes. A TVS diode or a voltage clamp can be used to protect the device from overvoltage conditions.
A low-ESR ceramic capacitor with a value of 10uF to 22uF is recommended for input decoupling. The capacitor should be placed as close as possible to the device's input pins to minimize noise and ensure optimal performance.
TPS40075RHLT datasheet
by Texas Instruments
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