component

RY3408

Public Made by Adom

by adom

RYCHIP DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs ry3408: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json ry3408: specified limits as data (metadata.characteristics, 32 rows from the datasheet) · Ray
README.md ry3408: specified limits as data (metadata.characteristics, 32 rows from the datasheet) · Ray
ry3408-etched.fit.json ry3408: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ry3408-etched.glb ry3408: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ry3408-etched.step ry3408: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ry3408.glb Publish 0.1.0 · Ray
ry3408.kicad_mod Publish 0.1.0 · Ray
ry3408.kicad_sym Publish 0.1.0 · Ray
ry3408.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
ry3408.step Publish 0.1.0 · Ray

RY3408

RYCHIP · DC-DC Converters · SOT-23-5

RY3408 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. rising threshold 1.15V, hysteresis 140mV) to turn the regulator on; drive below 0.3V to shut it down (shutdown current <1µA). Must not be left floating. Absolute max 6.0V.
2 GND power_in Device ground return. Connect to a large copper area to improve thermal performance and provide a low-impedance return for the input capacitor and internal low-side NMOS.
3 SW output Switch-node output; drains of the internal P-channel and N-channel power MOSFETs. Connect to the external inductor. Peak SW sink/source current is rated to 3A; absolute max voltage -0.3V to (VIN+0.3V).
4 IN power_in Power supply input, 2.5V to 5.5V operating (absolute max 6.0V). Must be closely decoupled to GND with a 10µF or greater ceramic capacitor placed near the pin.
5 FB input Output-voltage feedback input. Connect to the external resistor divider tap; the regulator servos FB to the internal 0.600V reference (VOUT = 0.6V x (R1+R2)/R2). Absolute max 6.0V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • RY3408

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage Range 2.5 5.5 V 3
UVLO Threshold 2.4 V 3
Input DC Supply Current 150 300 µA FB = 90%, Iload=0mA 3
Input DC Supply Current 40 70 µA FB= 105%, Iload=0mA 3
Input DC Supply Current (shutdown) 0.1 1 µA VEN = 0V, VIN=4.2V 3
Regulated Feedback Voltage 0.588 0.6 0.612 V 3
Reference Voltage Line Regulation 0.04 0.4 %/V Vin = 2.5V to 5.5V 3
Output Voltage Line Regulation 0.04 0.4 % VIN = 2.5V to 5.5V 3
Output Voltage Load Regulation 0.5 % 3
Oscillation Frequency 1.5 MHz 3
On Resistance of PMOS 0.3 Ω ISW=100mA 3
ON Resistance of NMOS 0.2 Ω ISW=-100mA 3
Peak Current Limit 1.5 A VIN= 3.6V, FB=90% 3
EN up Threshold 1.05 1.15 1.25 V VEN-Rising 3
EN Threshold Hysteresis 140 mV 3
EN Leakage Current -1 0.01 1 µA 3
SW Leakage Current -1 0.01 1 µA VEN=0V, VIN=Vsw=5V 3
Soft Start 1.2 mS 3
Thermal Shutdown 160 ℃ 3
Thermal Hysteresis 20 ℃ 3
Input Supply Voltage -0.3 6 V 3
EN, FB Voltages -0.3 6 V 3
SW Voltage -0.3 V 3
Peak SW Sink and Source Current 3 A 3
Thermal Resistance (θJA) θJA 170 °C/W 3
ESD (Human Body Made) HMB 2 KV 3
Operating Temperature Range -40 85 °C 3
Junction Temperature 125 °C 3
Storage Temperature Range -65 150 °C 3
Lead Temperature (Soldering, 10s) 300 °C 10s soldering 3
Thermal Resistance (θJC) SOT23-5 θJC 130 °C/W 3
ESD (Machine Made) MM 200 V 3

CAD (KiCad official)

  • Symbol: RY3408
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ry3408-etched.step / ry3408-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ry3408.step / ry3408.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ry3408.step 85 KB You want the bare part, or you mark your own boards.
ry3408-etched.step 1.6 MB You want the part with RY3408 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 373 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 (9 pp, sha256 dff34b6a65435b27, 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