SLVSEI2A November 2018 – May 2019 TPS56339
PRODUCTION DATA.
The TP56339 is in active mode when VEN is above the precision enable threshold, VIN is above its respective UVLO level. The simplest way to enable the device is to float the EN pin. This allows self startup when the input voltage is in the operating range 4.5 V to 24 V.
In active mode, depending on the load current, the device is in one of there modes:
1. Continuous Conduction Mode (CCM) with fixed switching frequency when load current is above half of the peak-to-peak inductor current ripple.
2. Discontinuous Conduction Mode (DCM) with fixed switching frequency when load current is lower than half of the peak-to-peak inductor current ripple in CCM operation.
3. Pulse Frequency Modulation Mode (PFM) when switching frequency is decreased at very light load.