component
RT8110BGJ8
Public Made by Adomby adom
Richtek Tech DC-DC Converters, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RT8110BGJ8
Richtek Tech · DC-DC Converters · TSOT-23-8
RT8110BGJ8 from Richtek Tech, in a TSOT-23-8. 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 | VCC | power_out | Internal regulator output, typically 5.5V, that serves as the main bias supply and low-side gate driver supply and must be decoupled with a ceramic capacitor; it is monitored for power-on reset. |
| 2 | LGATE | output | Gate drive output for the low-side MOSFET. |
| 3 | GND | power_in | Signal and power ground of the IC; all voltage levels are referenced to this pin. |
| 4 | UGATE | output | Gate drive output for the high-side MOSFET. |
| 5 | BOOT | power_in | Supplies the high-side MOSFET gate driver through a bootstrap circuit; absolute maximum rating is 34V. |
| 6 | PHASE | passive | Switching node of the buck converter, also used to sense the low-side MOSFET voltage drop for overcurrent protection; absolute maximum range is -3V to 29V. |
| 7 | VIN | power_in | Connected to the integrated BJT collector that regulates VIN to 5.5V for VCC; designed to withstand 28V with a recommended input range of 10V to 28V. |
| 8 | FB | input | Inverting input of the error amplifier, connected to the output voltage divider; falling below the 0.5V typical threshold trips under voltage protection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | TSOT-23-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply Current | IVIN | 3 | 6 | mA | UGATE, LGATE open | 4 | |
| Input Voltage Range | VIN | 10 | 28 | V | 4 | ||
| Reference Voltage | VREF | 0.784 | 0.8 | 0.816 | V | 4 | |
| Free Running Frequency | fSW | 320 | 400 | 480 | kHz | 4 | |
| Open Loop DC Gain | AO | 60 | 90 | dB | Note 5 | 4 | |
| UGATE Drive Source Resistance | RUGATEsr | 3 | 4.5 | Ω | VBOOT − PHASE = 5V; VBOOT − VUGATE = 1V | 5 | |
| UGATE Drive Sink Resistance | RUGATEsk | 2 | 3 | Ω | VUGATE − PHASE = 1V; VBOOT − PHASE = 5V | 5 | |
| LGATE Drive Source Resistance | RLGATEsr | 4 | 6 | Ω | VCC − VLGATE = 1V | 5 | |
| LGATE Drive Sink Resistance | RLGATEsk | 2 | 4 | Ω | VLGATE = 1V | 5 | |
| UVP Threshold | 0.5 | 0.6 | V | FB Voltage Falling | 5 | ||
| Soft-Start Interval | TSS | 1 | 3 | 6 | ms | 5 | |
| Supply Voltage | VIN | 10 | 28 | V | 4 | ||
| Junction Temperature Range | -40 | 125 | °C | 4 | |||
| Ambient Temperature Range | -40 | 85 | °C | 4 | |||
| Supply Voltage | VCC | 7 | V | 4 | |||
| Supply Voltage | VIN | 33 | V | 4 | |||
| PHASE | -3 | 29 | V | 4 | |||
| BOOT | 34 | V | 4 | ||||
| Input/Output Voltage | 7 | V | 4 | ||||
| Junction Temperature | 150 | °C | 4 | ||||
| Lead Temperature | 260 | °C | Soldering, 10 sec. | 4 | |||
| Storage Temperature Range | -65 | 150 | °C | 4 | |||
| ESD Susceptibility HBM | 2 | kV | Human Body Mode | 4 | |||
| ESD Susceptibility MM | 200 | V | Machine Mode | 4 | |||
| Power Dissipation | PD | 0.382 | W | TA = 25°C, TSO-23-8 | 4 | ||
| Package Thermal Resistance | θJA | 262 | °C/W | TSO-23-8; natural convection, TA = 25°C, JEDEC 51-3 (Note 2) | 4 |
CAD (KiCad official)
- Symbol:
RT8110BGJ8 - Footprint:
Package_TO_SOT_SMD:TSOT-23-8 - 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files:
rt8110bgj8-etched.step/rt8110bgj8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt8110bgj8.step/rt8110bgj8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (13 pp, sha256
a7b40ad0ae942f8f, retrieved 2026-10-18, 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).
# RT8110BGJ8
**Richtek Tech** · DC-DC Converters · TSOT-23-8
RT8110BGJ8 from Richtek Tech, in a TSOT-23-8. 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 | VCC | power_out | Internal regulator output, typically 5.5V, that serves as the main bias supply and low-side gate driver supply and must be decoupled with a ceramic capacitor; it is monitored for power-on reset. |
| 2 | LGATE | output | Gate drive output for the low-side MOSFET. |
| 3 | GND | power_in | Signal and power ground of the IC; all voltage levels are referenced to this pin. |
| 4 | UGATE | output | Gate drive output for the high-side MOSFET. |
| 5 | BOOT | power_in | Supplies the high-side MOSFET gate driver through a bootstrap circuit; absolute maximum rating is 34V. |
| 6 | PHASE | passive | Switching node of the buck converter, also used to sense the low-side MOSFET voltage drop for overcurrent protection; absolute maximum range is -3V to 29V. |
| 7 | VIN | power_in | Connected to the integrated BJT collector that regulates VIN to 5.5V for VCC; designed to withstand 28V with a recommended input range of 10V to 28V. |
| 8 | FB | input | Inverting input of the error amplifier, connected to the output voltage divider; falling below the 0.5V typical threshold trips under voltage protection. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | TSOT-23-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply Current | IVIN | | 3 | 6 | mA | UGATE, LGATE open | 4 |
| Input Voltage Range | VIN | 10 | | 28 | V | | 4 |
| Reference Voltage | VREF | 0.784 | 0.8 | 0.816 | V | | 4 |
| Free Running Frequency | fSW | 320 | 400 | 480 | kHz | | 4 |
| Open Loop DC Gain | AO | 60 | 90 | | dB | Note 5 | 4 |
| UGATE Drive Source Resistance | RUGATEsr | | 3 | 4.5 | Ω | VBOOT − PHASE = 5V; VBOOT − VUGATE = 1V | 5 |
| UGATE Drive Sink Resistance | RUGATEsk | | 2 | 3 | Ω | VUGATE − PHASE = 1V; VBOOT − PHASE = 5V | 5 |
| LGATE Drive Source Resistance | RLGATEsr | | 4 | 6 | Ω | VCC − VLGATE = 1V | 5 |
| LGATE Drive Sink Resistance | RLGATEsk | | 2 | 4 | Ω | VLGATE = 1V | 5 |
| UVP Threshold | | | 0.5 | 0.6 | V | FB Voltage Falling | 5 |
| Soft-Start Interval | TSS | 1 | 3 | 6 | ms | | 5 |
| Supply Voltage | VIN | 10 | | 28 | V | | 4 |
| Junction Temperature Range | | -40 | | 125 | °C | | 4 |
| Ambient Temperature Range | | -40 | | 85 | °C | | 4 |
| Supply Voltage | VCC | | | 7 | V | | 4 |
| Supply Voltage | VIN | | | 33 | V | | 4 |
| PHASE | | -3 | | 29 | V | | 4 |
| BOOT | | | | 34 | V | | 4 |
| Input/Output Voltage | | | | 7 | V | | 4 |
| Junction Temperature | | | | 150 | °C | | 4 |
| Lead Temperature | | | | 260 | °C | Soldering, 10 sec. | 4 |
| Storage Temperature Range | | -65 | | 150 | °C | | 4 |
| ESD Susceptibility HBM | | | | 2 | kV | Human Body Mode | 4 |
| ESD Susceptibility MM | | | | 200 | V | Machine Mode | 4 |
| Power Dissipation | PD | | | 0.382 | W | TA = 25°C, TSO-23-8 | 4 |
| Package Thermal Resistance | θJA | | 262 | | °C/W | TSO-23-8; natural convection, TA = 25°C, JEDEC 51-3 (Note 2) | 4 |
## CAD (KiCad official)
- Symbol: `RT8110BGJ8`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-8`
- 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files: `rt8110bgj8-etched.step` / `rt8110bgj8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt8110bgj8.step` / `rt8110bgj8.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Richtek Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586202478362963968) (13 pp, sha256 `a7b40ad0ae942f8f`, retrieved 2026-10-18, 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/rt8110bgj8-datasheet.pdf)