SLVSDG6B May 2016 – April 2021 TPS54302
The TPS54302 device is internally compensated and the internal compensation network is composed of two capacitors and one resister shown on the Section 7.2. Depending on the VOUT, if the output capacitor COUT is dominated by low ESR (ceramic types) capacitors, it could result in low phase margin. To improve the phase boost an external feedforward capacitor C6 can be added in parallel with R2. The C6 capacitor is chosen such that phase margin is boosted at the crossover frequency.
Equation 16 for C6 was tested.
Table 8-2 lists some recommended component values.
|VOUT (V)||L (µH)||COUT (µF)||R2 (kΩ)||R3 (kΩ)||C8 (pF)|