The recommended layout and placement for the TPS3801-01DCKRG4 involves placing the device close to the power source, using a solid ground plane, and keeping the input and output traces short and wide to minimize noise and voltage drops. Additionally, it is recommended to place a 10uF ceramic capacitor between the VIN and GND pins to filter out high-frequency noise.
The correct resistor values for the TPS3801-01DCKRG4 depend on the desired reset threshold voltage and the output voltage of the device. The datasheet provides a formula to calculate the resistor values based on the desired reset threshold voltage. Typically, R1 is chosen to be in the range of 1kΩ to 10kΩ, and R2 is chosen to be in the range of 1kΩ to 100kΩ.
The DELAY pin on the TPS3801-01DCKRG4 is used to set the delay time between the power-on reset (POR) and the reset signal output. By connecting a capacitor between the DELAY pin and GND, the delay time can be adjusted to ensure that the reset signal is asserted only after the power supply has stabilized.
Yes, the TPS3801-01DCKRG4 can be used with a voltage regulator that has a different output voltage. However, the reset threshold voltage should be adjusted accordingly using the resistor divider network to ensure that the device resets correctly. The datasheet provides a formula to calculate the reset threshold voltage based on the output voltage of the voltage regulator.
To ensure that the TPS3801-01DCKRG4 is immune to noise and glitches, it is recommended to use a low-pass filter on the input voltage, such as a 10uF ceramic capacitor in parallel with a 10Ω resistor. Additionally, the device should be placed in a noise-free area of the PCB, and the input and output traces should be kept short and shielded to minimize noise coupling.
TPS3801-01DCKRG4 datasheet
by Texas Instruments
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