4 layers100 × 100 mm

Texas Instruments
The LMZ21701 is an uncategorised made by Texas Instruments with 9 pins.
PCBKit's library has its KiCad symbol (Celestial_Power_Module:TI LMZ21701, from Altium's library), ready for a KiCad board. 1 open-source board in 1 repository on GitHub use it.
The library has no footprint for this part yet.
| Pin | Name | Type |
|---|---|---|
| 1 | SS | Passive |
| 2 | FB | Passive |
| 3 | PG | Passive |
| 4 | VOUT | Passive |
| 5 | GND | Passive |
| 6 | VOS | Passive |
| 7 | EN | Passive |
| 8 | VIN | Passive |
| 9 | GND | Passive |

Yes. The symbol is Celestial_Power_Module:TI LMZ21701, both drawn on this page. PCBKit places them on a board for you when you design with it.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.