RY8310 from RYCHIP, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	BS	passive	Bootstrap. A capacitor connected between SW and BS forms a floating supply across the high-side switch driver. Internal boost regulator refreshes this rail via a diode from VCC.
2	GND	power_in	Ground pin. Return for the internal power stage and control circuitry. Connect to a large copper pour for thermal performance.
3	FB	input	Adjustable version feedback input. Connect FB to the center point of the external resistor divider from VOUT to GND. Internal reference VFB = 0.8V (typ, 0.780-0.820V).
4	EN	input	Enable input. Drive to logic-high (≥1.3V rising typ) to enable the IC; drive to logic-low (≤1V falling) to disable and enter micro-power shutdown mode. Absolute max 32V, so tolerant of direct connection to VIN.
5	IN	power_in	Power supply input pin. Operates from 4.5V to 30V (absolute max 32V). Bypass to GND with a low-ESR ceramic capacitor placed close to the pin.
6	SW	power_out	Switching pin. Output of the internal high-side and low-side MOSFETs; connect to the external inductor and to the bootstrap capacitor. Rated -0.3V to 33V (absolute max), -5V to 34V for 10ns transient.

Key specifications

Parameter	Value
Manufacturer	RYCHIP
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

RY8310

CAD (KiCad official)

Symbol: RY8310
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ry8310.step`	97 KB	You want the bare part, or you mark your own boards.
`ry8310-etched.step`	1.6 MB	You want the part with `RY8310` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 380 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: RYCHIP datasheet (13 pp, sha256 2f90c7ba09a51967, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF