SLVSFH6C January 2021 – December 2021 TPS61094
The TPS61094 integrates the one-pulse PFM to improve efficiency and decrease output ripple at light load. When the load current decreases, the inductor valley current setting by the output of the error amplifier no longer regulates the output voltage. When the inductor valley current hits the low limit, the output voltage exceeds the setting voltage as the load current decreases further. The TPS61094 goes into PFM mode. In PFM mode, the off time is extended by decreasing load and the TPS61094 regulates output voltage to the PFM reference voltage (typically 101% × VOUT_REG). The PFM operation reduces the switching losses and improves efficiency at light load condition by reducing the average switching frequency.