VIN21PWM/SYNC2#VALID13#VALID24VCC5PVCC6EXTVCC7VSET18VSET29VREF10GND11FB12RT13PGOOD14#PRIORITY15PVIN216ENA17BST218COM219SW20PGND21PGND22SW23COM124BST125DIODE26PVIN127VIN128PGND29