RY3430 from RYCHIP, in a SOT-23-5. 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	EN	input	Chip enable input. Drive above 1.5V (typ threshold 1.15V, hysteresis 140mV) to turn the regulator on; drive below 0.3V to disable it. Leakage is ±0.01µA typical. Do not leave floating.
2	GND	power_in	Device ground. Connect to a large copper plane to improve thermal performance and long-term reliability.
3	SW	output	Power switch node output; connects to the drains of the internal P-channel and N-channel MOSFET switches. Connect an external inductor from SW to VOUT. Peak switch current rating 4A.
4	VIN	power_in	Power supply input, 2.5V to 5.5V operating range (absolute max 6.0V). Must be closely decoupled to GND with a 10µF or greater ceramic capacitor placed close to the pin.
5	FB	input	Output voltage feedback input. An external resistor divider from VOUT to FB to GND sets the output voltage using the 0.600V internal reference (VOUT = VFB × (R1+R2)/R2).

Key specifications

Parameter	Value
Manufacturer	RYCHIP
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

RY343070301007

CAD (KiCad official)

Symbol: RY3430
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ry3430.step`	85 KB	You want the bare part, or you mark your own boards.
`ry3430-etched.step`	1.5 MB	You want the part with `RY3430` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 366 faces against 102 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 (10 pp, sha256 f499af7e71472cb5, 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