Texas Instruments provides a recommended PCB layout in the TPS79933 datasheet, which includes guidelines for component placement, trace routing, and thermal management. Additionally, the TI website offers a PCB layout checklist and a layout guide for low-dropout (LDO) regulators like the TPS79933.
The output capacitor selection depends on the output voltage, output current, and desired transient response. A general guideline is to use a capacitor with a minimum capacitance of 2.2 μF and an ESR (Equivalent Series Resistance) of less than 100 mΩ. TI recommends using a ceramic capacitor with an X5R or X7R dielectric. The datasheet provides more detailed guidance on output capacitor selection.
The TPS79933DRVRG4 has an absolute maximum input voltage rating of 6.5 V. However, the recommended operating input voltage range is 2.3 V to 5.5 V. Exceeding the absolute maximum input voltage can damage the device.
To ensure stability, follow the recommended PCB layout guidelines, use a suitable output capacitor, and avoid long traces between the input and output pins. Additionally, ensure that the input voltage is within the recommended operating range, and the output current is within the specified limits. TI also provides a stability analysis tool to help designers evaluate the stability of their design.
The TPS79933DRVRG4 has a thermal shutdown temperature of 150°C. When the junction temperature exceeds this threshold, the device will shut down to prevent damage. The device will automatically restart when the junction temperature drops below 130°C.
TPS79933DRVRG4 datasheet
by Texas Instruments
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