I have a design with the TPS4821 that had left the RT/CLK Pin Floating. After installing a 47.5K Resistor to GND, I see the PH signal toggling @ around 1 MHz for 5 - 6 times and then switches to 500KHz. Wondering if this is in Pulse Skipping Mode for Light Loads. Is there a minimum Load Requirement? The output voltage is 0.4V when designed for 1.0V. Is it possible the device was damaged due to a floating RT/CLK pin?
Below is the schematic of the circuit.
Vin/PVin = 5.0V,
1V5 is up to 1.5V
EN is High at 5V.
R90 is depopulated in order to isolate the supply from the Load Circuitry.
