| 1 | VIN | Input supply voltage pin for power and internal biasing. |
| 2 | EN | Enable pin. Logic high enables the operation. Do not allow this pin to float. |
| 3 | FB | Output voltage feedback pin. Connect FB to an external resistor divider to set the output voltage. |
| 4 | PG | Open-drain Power Good output. |
| 5 | GND | Signal and Power Ground Reference. |
| 6 | BD | Anode of the internal bootstrap diode. Connect to
VOUT or to a power source <
5.5V. |
| 7 | BOOST | Boost voltage that drives the internal NMOS control switch.
Connect a bootstrap capacitor between the BOOST
and SW pins. |
| 8 | SW | Output switch node. Connects to the inductor, freewheeling
diode and the bootstrap capacitor. |
| 9 | EP | Exposed Pad. Must be connected to the GND plane to help
dissipate power. |
