Hello,
I am facing one issue in the operation of LM5117. This is a 24V to 12 V Synchronous Buck design. With no load it is working fine. When I add some load to it (3A approx), The gate pulses ate skipped, and output voltage drops to 2V. Other observations at this moment are
1. SS pin is discharged and charged with a time period of 500 us to 800 us (depending on input voltage, with higher input voltage time period increases). Gate pulses are also of same period.
2. Switching frequency is 300 KHz, same as designed for.
3. Peak of the SS pin charging curve is just 100mV
4. UVLO pin is at 2V approx
5. schematic of the LM5117 part is as attached
