ZHCSLU8A September 2020 – October 2020 TPS51397A
PRODUCTION DATA
After selecting the inductor, the output capacitor needs to be optimized. In D-CAP3, the regulator reacts within one cycle to the change in the duty cycle, so good transient performance can be achieved without needing large amounts of output capacitance. The recommended output capacitance range is given in Table 8-2. Ceramic capacitors have very low ESR, otherwise the maximum ESR of the capacitor should be less than VOUT(ripple)/IOUT(ripple).
| VOUT (V) | RLOWER (kΩ) | RUPPER (kΩ) | Fsw (kHz) | LOUT (μH) | COUT(min) (μF) | COUT(max) (μF) | CFF (pF) |
|---|---|---|---|---|---|---|---|
| 0.6 | 10 | 0 | 500 | 0.33 | 66 | 330 | - |
| 800 | 0.22 | 66 | 330 | - | |||
| 1.2 | 10 | 10 | 500 | 0.68 | 66 | 330 | - |
| 800 | 0.47 | 66 | 330 | - | |||
| 2.5 | 15 | 47.5 | 500 | 1.2 | 66 | 330 | - |
| 800 | 1.0 | 66 | 330 | - | |||
| 3.3 | 20 | 90 | 500 | 1.5 | 66 | 330 | 22-110 |
| 800 | 1.2 | 66 | 330 | 22-110 | |||
| 5.0 | 15 | 110 | 500 | 1.8 | 66 | 330 | 22-110 |
| 800 | 1.5 | 66 | 330 | 22-110 |