component

RY3409

Public Unreviewed

by Ray

RYCHIP DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmicry3409
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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RY3409

RYCHIP · DC-DC Converters · SOT-23-5

RY3409 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. Drive EN above 1.2V (rising threshold) to turn the part on; drive below 0.6V (falling threshold) to shut it down. Do not leave EN floating. Absolute maximum EN voltage is 6.5V.
2 GND power_in Device ground return. Connect to a large copper pour for thermal dissipation and to close the input-capacitor current loop.
3 SW output Power switch node. Common drain of the internal P-channel high-side and N-channel low-side MOSFETs; connect to the external inductor. SW absolute maximum is -5V to 9V (10ns transient).
4 IN power_in Power supply input, 2.5V to 6V operating range (6.5V absolute max). Must be closely decoupled to GND with a 10uF or greater ceramic capacitor (plus an optional 0.1uF high-frequency bypass).
5 FB input Output voltage feedback. Connect the tap of an external R1/R2 divider from VOUT; the internal loop regulates FB to VFB = 0.6V (0.585V-0.615V). Recommended R2 <= 200k ohm. Absolute maximum FB voltage is 6V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • RY3409

CAD (KiCad official)

  • Symbol: RY3409
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: RYCHIP datasheet (13 pp, sha256 1c1c1f1c9fb5e660, 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