ZHCSIK3 July 2018 TPS650861
PRODUCTION DATA.
The PMIC can be operated by a 5-V input voltage to the system because the power path of the controller does not go through the device itself. The concept is simple: supply the controller VINs with the 5-V input, and supply the VSYS with a 5.8-V step-up of the 5 V with a boost or charge pump. The 5.8 V is recommended because the UVLO of the internal LDO5 is at 5.6 V and the device measures the voltage at VSYS and determines the optimum internal compensation and controller settings thus, it is ideal the VSYS be close to the VIN of the controllers.