ZHCSIY3C March 2019 – August 2019 TPS568230
PRODUCTION DATA.
After selecting the inductor the output capacitor needs to be optimized. In DCAP3™, the regulator reacts within one cycle to the change in the duty cycle so the good transient performance can be achieved without needing large amounts of output capacitance. The recommended output capacitance range is given in Table 3.
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 | 600 | 0.47 | 66 | 500 | - |
| 800 | 0.33 | 66 | 500 | - | |||
| 1000 | 0.27 | 66 | 500 | - | |||
| 1 | 30 | 20 | 600 | 0.68 | 66 | 500 | - |
| 800 | 0.47 | 66 | 500 | - | |||
| 1000 | 0.33 | 66 | 500 | - | |||
| 3.3 | 20 | 90 | 600 | 1.5 | 66 | 500 | 47-330 |
| 800 | 1.2 | 66 | 500 | 47-330 | |||
| 1000 | 1 | 66 | 500 | 47-330 | |||
| 5.0 | 30 | 220 | 600 | 2.2 | 66 | 500 | 47-330 |
| 800 | 1.5 | 66 | 500 | 47-330 | |||
| 1000 | 1.2 | 66 | 500 | 47-330 |