ZHCSE67B October 2015 – July 2018 TLV62085
PRODUCTION DATA.
7.3.1 Power Save Mode
As the load current decreases, the TLV62085 enters Power Save Mode (PSM) operation. During Power Save Mode, the converter operates with reduced switching frequency and with a minimum quiescent current maintaining high efficiency. Power Save Mode occurs when the inductor current becomes discontinuous. Power Save Mode is based on a fixed on-time architecture, as related in Equation 1. The switching frequency over the whole load current range is also shown in Figure 1 for a shown typical application.
In PSM, the output voltage rises slightly above the nominal output voltage, as shown in Figure 10. This effect is minimized by increasing the output capacitor or inductor value.
During PAUSE period in PSM (shown in Figure 3), the device does not change the PG pin state nor does it detect an UVLO event, in order to achieve a minimum quiescent current and maintain high efficiency at light loads.
