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
In some applications the LDO regulator must limit the slew rate during the turn-on period [17] , [18], and [19], and the most desirable way to achieve this requirement is to adjust the CNR/SS or CFF capacitance. These slew rate requirements may be enforced across a narrow range of turn on, such as between 2V and 4V of a 5V output, or across the entire voltage range from 0V to steady state. In general, it may be more challenging to meet these requirements using a device with an exponentially rising output as shown in Figure 3-4 than a linear ramp as shown in Figure 3-3. To slow down a fixed output LDO regulator where the NR filter and feedback resistors are internal to the device, the only option remaining is to increase the output capacitance, COUT such that the current limit loop engages approximately 20µs to 50µs into the turn-on period.