SLVSH63 February 2023 TLVM13610
PRODUCTION DATA
Short RBOOT to CBOOT and connect VLDOIN to the 5-V output for best efficiency. To increase phase margin when using an output capacitance close to the minimum in Table 8-1, a feedforward capacitor, designated as CFF can be placed across the upper feedback resistor. Place the zero created by CFF and RFBT higher than one fifth the switching so that it boosts phase but does not significantly increase the crossover frequency. Because this CFF capacitor can conduct noise from the output of the circuit directly to the FB node of the IC, a 4.99-kΩ resistor, RFF, must be placed in series with CFF. If the ESR zero of the output capacitor is below 200 kHz, do not use CFF.