SLVAET3 October 2021 TPS8802
The TPS8802 typically consumes 3.8 μA current when 3 V is applied to VCC. This current is always drawn when VCC is supplied with 3 V. The TPS8802 standby current supplies the power LDO (PLDO), 2.3 V INT LDO analog supply, and digital core. I2C communication and the sleep timer are active and do not require additional current to use. The primary blocks in the TPS8802 that add to system standby current consumption are the MCU LDO, CO amplifier, and VCCLOW monitor. The MCU LDO uses 2.0 μA current, CO amplifier uses 0.6 μA current, and the VCCLOW monitor uses 0.9 μA current. Other blocks such as the photo amplifier and boost converter consume several hundred microamps of current and are strategically enabled for a short amount of time during measurements to make their overall contribution to total power negligible.