Name of device: PTH12000W
Test made: Turn ON without load (the same voltage drop appears when load is 0 to 1.5 A of load, although if the load is higher, the voltage drop is lower.). By using a load of 2 A, the voltage drop disappears.
Fig 1: Turn ON with no load. (yellow) Vin = 12 V, (green) Vout = 3V3
Fig 2: Detail of the glitch which appears 20 ms after the turned on without load. (yellow) Vin = 13.2 V, (green) Vout
This voltage drop of 300 mV appears without load (0 to 1.5 A) by using different configurations:
- Cout = 33 uF + 100 uF + 100 uF (Cin = 47 uF + 47 uF)
- Cout = 33 uF + 100 uF (Cin = 47 uF + 47 uF)
- Cout = 33 uF (Cin = 47 uF + 47 uF)
- Cout = 0 (Cin = 47 uF + 47 uF)
- Cout = 330uF (Cin = 47 uF + 47 uF+ 330uF)
We need to remove this voltage drop because for our application is not acceptable (from 3V3 to 3V0).
Why this voltage drop appears? Is there any way to remove that?
Thanks in advance.