Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general guidelines for LDO regulator layout, such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce noise and EMI.
The output voltage tolerance of the TPS79918DDCTG4 is specified as ±2% over the operating temperature range. To calculate the output voltage tolerance, multiply the nominal output voltage by the tolerance percentage. For example, for a 1.8V output, the tolerance would be ±36mV (1.8V x 0.02).
The maximum input voltage that can be applied to the TPS79918DDCTG4 is 6.5V. Exceeding this voltage can cause damage to the device. It's recommended to ensure that the input voltage is within the specified range to ensure reliable operation.
To determine the power dissipation of the TPS79918DDCTG4, calculate the difference between the input voltage and output voltage, and multiply it by the output current. For example, if the input voltage is 5V, output voltage is 1.8V, and output current is 100mA, the power dissipation would be approximately 320mW ((5V - 1.8V) x 100mA).
The recommended input capacitor value is 1µF to 10µF, and the type should be a low-ESR ceramic capacitor. The input capacitor helps to filter out noise and ripple on the input voltage, and ensures stable operation of the device.
TPS79918DDCTG4 datasheet
by Texas Instruments
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