The recommended layout and placement for the MAX836EUS+ involves placing the device close to the battery, using short traces, and minimizing the loop area to reduce EMI. A solid ground plane is also recommended to reduce noise and improve performance.
To ensure the accuracy of the battery voltage monitoring function, it is recommended to use a high-precision external resistor divider network to scale the battery voltage to the input range of the MAX836EUS+. Additionally, the device should be calibrated during manufacturing to account for any internal voltage references and resistor tolerances.
The maximum allowed voltage on the BAT pin is 6V, which is the absolute maximum rating. However, the recommended operating voltage range is 2.5V to 5.5V to ensure accurate battery voltage monitoring and to prevent damage to the device.
The power-on reset (POR) function can be handled by adding an external capacitor to the RST pin to filter out any noise or glitches during power-up and power-down sequences. The capacitor value should be chosen based on the specific application requirements and the desired reset timing.
The EN pin is an active-low enable input that allows the device to be shut down and restarted. When the EN pin is pulled low, the device enters a low-power shutdown mode, and when it is pulled high, the device restarts and resumes normal operation.
MAX836EUS+ datasheet
by Maxim Integrated Products
