component
RT9818A-30GB
Public Made by Adomby adom
Richtek Tech Supervisor And Reset ICs, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RT9818A-30GB
Richtek Tech · Supervisor And Reset ICs · SOT-23-5
RT9818A-30GB from Richtek Tech, in a SOT-23-5. 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 | RESET | output | Active low N-channel open-drain reset output (A suffix = 0ms timeout), asserted when VDD falls below the threshold and needs an external pull-up (100k typical); VOL max 0.4V at ISINK > 3.5mA. |
| 2 | VDD | power_in | Power pin and monitored supply input; operating range 0.9V to 6V, absolute maximum -0.3V to 6V. |
| 3 | GND | power_in | Ground. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating VDD (VOUT) Range | VDD | 0.9 | 6 | V | 3 | ||
| Supply Current | IDD | 3 | 8 | μA | VTH = 3V, VDD = 4.5V, TA = 27C | 3 | |
| Threshold Voltage Accuracy | VTH | -1.5 | 1.5 | % | TA = 27C | 3 | |
| RESET Output Voltage Low | VOL | 0.4 | V | VDD < VTH, ISINK > 3.5mA | 3 | ||
| Hysteresis Width | VHYS | 0.01 | 0.016 | VTH | 3 | ||
| Terminal Voltage (with Respect to GND), VDD | VDD | -0.3 | 6 | V | 3 | ||
| Terminal Voltage (with Respect to GND), All Other Inputs | -0.3 | 6 | V | 3 | |||
| Input Current | IVDD | 20 | mA | 3 | |||
| Power Dissipation, SOT-23-5 | PD | 0.4 | W | TA = 25°C | 3 | ||
| Lead Temperature (Soldering) | 260 | °C | Soldering, 10 sec. | 3 | |||
| Storage Temperature Range | -65 | 150 | °C | 3 | |||
| Package Thermal Resistance, SOT-23-5 | θJA | 250 | °C/W | Note 2: TA = 25°C, low effective thermal conductivity single-layer test board per JEDEC 51-3 | 3 | ||
| Junction Temperature Range | -40 | 125 | °C | 3 | |||
| Ambient Temperature Range | -40 | 85 | °C | 3 |
CAD (KiCad official)
- Symbol:
RT9818A-30GB - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
rt9818a-30gb-etched.step/rt9818a-30gb-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt9818a-30gb.step/rt9818a-30gb.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (14 pp, sha256
f01cb2fba9eeeacd, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# RT9818A-30GB
**Richtek Tech** · Supervisor And Reset ICs · SOT-23-5
RT9818A-30GB from Richtek Tech, in a SOT-23-5. 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 | RESET | output | Active low N-channel open-drain reset output (A suffix = 0ms timeout), asserted when VDD falls below the threshold and needs an external pull-up (100k typical); VOL max 0.4V at ISINK > 3.5mA. |
| 2 | VDD | power_in | Power pin and monitored supply input; operating range 0.9V to 6V, absolute maximum -0.3V to 6V. |
| 3 | GND | power_in | Ground. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating VDD (VOUT) Range | VDD | 0.9 | | 6 | V | | 3 |
| Supply Current | IDD | | 3 | 8 | μA | VTH = 3V, VDD = 4.5V, TA = 27C | 3 |
| Threshold Voltage Accuracy | VTH | -1.5 | | 1.5 | % | TA = 27C | 3 |
| RESET Output Voltage Low | VOL | | | 0.4 | V | VDD < VTH, ISINK > 3.5mA | 3 |
| Hysteresis Width | VHYS | | 0.01 | 0.016 | VTH | | 3 |
| Terminal Voltage (with Respect to GND), VDD | VDD | -0.3 | | 6 | V | | 3 |
| Terminal Voltage (with Respect to GND), All Other Inputs | | -0.3 | | 6 | V | | 3 |
| Input Current | IVDD | | | 20 | mA | | 3 |
| Power Dissipation, SOT-23-5 | PD | | | 0.4 | W | TA = 25°C | 3 |
| Lead Temperature (Soldering) | | | | 260 | °C | Soldering, 10 sec. | 3 |
| Storage Temperature Range | | -65 | | 150 | °C | | 3 |
| Package Thermal Resistance, SOT-23-5 | θJA | | | 250 | °C/W | Note 2: TA = 25°C, low effective thermal conductivity single-layer test board per JEDEC 51-3 | 3 |
| Junction Temperature Range | | -40 | | 125 | °C | | 3 |
| Ambient Temperature Range | | -40 | | 85 | °C | | 3 |
## CAD (KiCad official)
- Symbol: `RT9818A-30GB`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `rt9818a-30gb-etched.step` / `rt9818a-30gb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt9818a-30gb.step` / `rt9818a-30gb.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/8590466639520169984) (14 pp, sha256 `f01cb2fba9eeeacd`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/rt9818a-30gb-datasheet.pdf)