component

RY8401

Public Made by Adom

by adom

RYCHIP DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RY8401

RYCHIP · DC-DC Converters · SOT-23-6

RY8401 from RYCHIP, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BS power_out Bootstrap pin: a capacitor connected between SW and this pin forms the floating supply for the high-side switch driver.
2 GND power_in Ground pin.
3 FB input Adjustable-version feedback input, connected to the center point of the external resistor divider; the internal reference is 0.8V (0.780V to 0.820V).
4 EN input Drive to logic-high to enable the IC and to logic-low to disable it into micro-power shutdown; the rising threshold is 1.3V and the falling threshold is 0.9V.
5 IN power_in Power supply pin; the input voltage range is 4V to 38V, with an absolute maximum VIN of 42V.
6 SW output Switching pin connected to the internal power MOSFETs; the absolute maximum SW voltage is -0.3V to 42V.

Key specifications

Parameter Value
Manufacturer RYCHIP
Package SOT-23-6
Category Power Management (PMIC)
Pins 6

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 (VIN) absolute maximum -0.3 42 V 3
EN voltage absolute maximum -0.3 42 V 3
SW voltage absolute maximum -0.3 42 V 3
BS voltage absolute maximum 7 V 3
FB voltage absolute maximum -0.3 6 V 3
Operating junction temperature absolute maximum TJ -40 150 °C 3
Storage temperature Tstg -65 150 °C 3
Lead temperature (soldering) 260 °C Soldering, 10 sec. 3
Operating junction temperature (recommended) -40 125 °C 3
Operating temperature range -40 85 °C 3
Input voltage VIN 4 38 V 3
Output current 0 0.6 A 3
Input Voltage Range 4 38 V 4
Supply Current (Quiescent) 0.4 0.8 mA VEN =3.0V 4
Supply Current (Shutdown) 10 uA VEN =0 or EN = GND 4
Feedback Voltage 0.78 0.8 0.82 V 4
High-Side Switch On-Resistance 500 mΩ ISW=100mA 4
Low-Side Switch On-Resistance 300 mΩ ISW=-100mA 4
Upper Switch Current Limit 1 A 4
Over Voltage Protection Threshold 39 V 4
Switching Frequency 800 KHz 4
Maximum Duty Cycle 92 % VFB=90% 4
Minimum On-Time 60 nS 4
EN Rising Threshold 1.3 V 4
EN Falling Threshold 0.9 V 4
Under-Voltage Lockout Threshold, Wake up VIN Voltage 3.6 3.8 V 4
Under-Voltage Lockout Threshold, Shutdown VIN Voltage 3.1 3.3 V 4
Under-Voltage Lockout Hysteresis VIN voltage 300 mV 4
Soft Start 1 mS 4
Thermal Shutdown 150 ℃ 4
Thermal Hysteresis 30 ℃ 4
Junction-to-ambient thermal resistance (RθJA) RθJA 105 °C/W JESD 51-7, 4-layer JEDEC board 4
Junction-to-case (top) thermal resistance RθJC(top) 55 °C/W 4
Junction-to-board thermal resistance RθJB 17.5 °C/W 4
Junction-to-top characterization parameter ψJT 3.5 °C/W 4
Junction-to-board characterization parameter ψJB 17.5 °C/W 4

CAD (KiCad official)

  • Symbol: RY8401
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: ry8401-etched.step / ry8401-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ry8401.step / ry8401.glb are the bare package body.

Provenance

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

  • Datasheet: RYCHIP datasheet (13 pp, sha256 e041ccbaf017727a, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF