Gentlemen
we use the several pcs LP5907SNX_3.3V at our module, while find the LP5907SNX_3.3V output got oscillation, the frequency is about 360KHz. the output cap PN CL03A105MP3NSNC from samsung, voltage rate 10V.
3.8V_SW is the input power, inital set the 3.8V_SW = 3.5V, the ourput ripple is ~20mV
when set the 3.8V_SW = 3.8V, the ourput ripple is 80mV high
when set the 3.8V_SW = 4.0V, the ourput ripple is 100mV high
what caused the oscilllation and which the higher input power could cause the high osicalltion, any clue
Apprieciate the support and help.
Input power =3.5V, output ripple 20mV
Input power =3.8V, output ripple 80mV
Input power =4.0V, output ripple 100mV