component
RY8401
Public Made by Adomby 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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ry8401.step/ry8401.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588919898928263168) (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](docs/ry8401-datasheet.pdf)