| 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 | The anode of the internal bootstrap diode. Connect it to VOUT or to a power source < 5.5V. |
| 7 | BOOST | Boost voltage that drives the internal NMOS control switch. A bootstrap capacitor is connected 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 in order to
help dissipate power. |
