A good PCB layout for the TPS79901DRVR involves placing the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. TI provides a recommended PCB layout in the datasheet and in application notes.
The choice of input and output capacitors depends on the specific application requirements. TI recommends using low-ESR capacitors with a minimum capacitance of 1uF for the input and output. The X5R or X7R dielectric is recommended for its stability over temperature.
The TPS79901DRVR can handle input voltages up to 6.5V, but it is recommended to operate within the specified input voltage range of 2.7V to 5.5V for optimal performance and reliability.
To ensure stability, it is essential to follow the recommended PCB layout, choose the right input and output capacitors, and ensure that the output voltage is within the specified range. Additionally, the output voltage can be adjusted using the FB pin, and the device has built-in overcurrent protection and thermal shutdown to prevent damage.
The TPS79901DRVR is rated for operation up to 125°C, but it is essential to follow the recommended thermal design and layout guidelines to ensure reliable operation. The device has built-in thermal shutdown to prevent damage in high-temperature conditions.
TPS79901DRVR datasheet
by Texas Instruments
