Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the power and ground planes separate, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise.
To ensure accurate voltage monitoring, it's crucial to use a high-precision voltage reference, such as the internal reference or an external reference like the TL431. Additionally, ensure that the voltage sense lines are properly filtered and shielded to minimize noise and interference.
Although the datasheet specifies a maximum VCC voltage of 5.5V, it's recommended to limit the voltage to 5V or less to ensure reliable operation and prevent damage to the device.
During power-up, the RST pin should be pulled high to ensure a clean reset. During power-down, the RST pin should be pulled low to prevent unwanted resets. It's also recommended to add a pull-up resistor and a capacitor to the RST pin to filter out noise and glitches.
The VREF pin provides an internal voltage reference (2.5V) that can be used as a reference for the voltage monitoring circuitry. You can use this pin as a reference for the voltage sense inputs (VIN1 and VIN2) or as a voltage reference for other circuitry in your design.
