JAJSDK0 August 2017
PRODUCTION DATA.
The battery connection on the REGIN pin is used for two purposes:
A capacitor of value of at least 1 µF should be connected between REGIN and VSS. Place the capacitor close to the fuel gauge and have short traces to the REGIN pin and VSS.
The fuel gauge has an integrated LDO with an output on the REG18 pin of approximately 1.8 V. A capacitor of value at least 2.2 µF should be connected between the REG18 pin and VSS. Place the capacitor close to the fuel gauge and have short traces to both the REG18 pin and VSS. This regulator must not be used to provide power for other devices in the system.