SLVAFX0 October 2024 TLV702 , TLV703 , TLV755P , TPS74401 , TPS7A13 , TPS7A14 , TPS7A20 , TPS7A21 , TPS7A49 , TPS7A52 , TPS7A53 , TPS7A53B , TPS7A54 , TPS7A57 , TPS7A74 , TPS7A83A , TPS7A84A , TPS7A85A , TPS7A91 , TPS7A92 , TPS7A94 , TPS7A96 , TPS7H1111-SP
If Figure 2-1 describes the LDO architecture, and the fast-charge circuit uses IFC, Equation 6 can be rewritten as Equation 16 after t > tCO. Use Equation 11 through Equation 15 and Equation 16 to calculate the turn-on time for these LDO regulators.
When t ≤ tCO, use Equation 13 to calculate VFB(t).
When t > tCO, use Equation 16 to calculate VFB(t).
The TPS7A91 uses a precision voltage reference, low pass NR filter, optional external CFF capacitor across RTOP, and includes a constant current fast charge circuit. The fast charge current is user selectable using the SS_CTRL pin. VCO is 97% of VREF. The EVM was used for the measurements.