Buck converter TPSM33625RDNR is used to covert +28V power rail to -5V rail. Its schematic is dipicted in Fig.1. The 28V power supply comes from a battery array, and the -5V load only draw a current in the range of 10mA~100mA. To my surprise, this buck converter often get burnt shortly after power-up.
Could you provide a proven reference application circuit which only occupies a small area like this.
Fig.1 Inverting-coverter by TPSM33625RDNR
