HI,
For LM5118Q1MH, VIN = 15 - 30V, VOUT = 21.5V, Load = 3.0A. Our voltage output test fails on some production units when VIN = 27.25V-27.75V (.25V per test step). When we analyze it appears that the suspect devices are switching from buck-boost mode to buck mode prematurely. When this happens, the device is not able to regulate the output voltage under load at the programmed level. Can you tell us why this is happening and what may be the cause? What else should we examine?
Thank you,
HSG
