component
RT9161A-33GX
Public Made by Adomby adom
Richtek Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RT9161A-33GX
Richtek Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
RT9161A-33GX from Richtek Tech, in a SOT-89. 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 | GND | power_in | Ground reference pin for the regulator, which the datasheet lists as a ground connection with a 1uF or higher input capacitor and a 10uF output capacitor (ESR of 200mΩ or higher) required between VOUT and GND for stability. |
| 2 | VIN | power_in | Power input (also the SOT-89 tab, shown as VIN (TAB) in the pin diagram); the datasheet gives an absolute maximum input of -0.3 to 14V and an input voltage range up to 12V, and recommends at least 1uF between VIN and GND to filter input noise. |
| 3 | VOUT | power_out | Regulated output voltage (fixed 3.3V for the -33 variant); the datasheet requires a 10uF output capacitor with ESR of 200mΩ or higher between VOUT and GND for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-89 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage Accuracy | VOUT | -2 | 2 | % | IL = 1mA, VIN = 5V | 4 | |
| Current Limit (RT9161A) | ILIM | 500 | 900 | mA | VIN = 5V, VOUT = 0V | 4 | |
| Dropout Voltage (RT9161A, 500mA) | VDROP | 750 | 1000 | mV | IL = 500mA (RT9161A column of 300/500mA) | 4 | |
| Load Regulation (RT9161A, 500mA) | VLOAD | 1 | 50 | mV | IL = 1mA to 500mA, VIN = 5V | 4 | |
| Line Regulation | VLINE | 2 | 3 | %VOUT | IL = 1mA, VIN = 4.5 to 12V | 4 | |
| Standby Current | ISTANDBY | 110 | 180 | A | IL = 0, VIN = 12V | 4 | |
| Output Voltage Temperature Coefficient | 50 | 150 | PPM/C | 4 | |||
| Input Voltage | -0.3 | 14 | V | 4 | |||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | 4 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| Power Dissipation (SOT-89) | PD | 0.571 | W | TA = 25°C | 4 | ||
| Thermal Resistance Junction-to-Ambient (SOT-89) | θJA | 175 | °C/W | Natural convection, TA = 25°C, JEDEC 51-3 low-effective single-layer board | 4 | ||
| Thermal Resistance Junction-to-Case (SOT-89) | θJC | 100 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
RT9161A-33GX - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
rt9161a-33gx-etched.step/rt9161a-33gx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt9161a-33gx.step/rt9161a-33gx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (12 pp, sha256
f9ed17ff387f5129, retrieved 2026-10-28, tier: manufacturer) - 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).
# RT9161A-33GX
**Richtek Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
RT9161A-33GX from Richtek Tech, in a SOT-89. 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 | GND | power_in | Ground reference pin for the regulator, which the datasheet lists as a ground connection with a 1uF or higher input capacitor and a 10uF output capacitor (ESR of 200mΩ or higher) required between VOUT and GND for stability. |
| 2 | VIN | power_in | Power input (also the SOT-89 tab, shown as VIN (TAB) in the pin diagram); the datasheet gives an absolute maximum input of -0.3 to 14V and an input voltage range up to 12V, and recommends at least 1uF between VIN and GND to filter input noise. |
| 3 | VOUT | power_out | Regulated output voltage (fixed 3.3V for the -33 variant); the datasheet requires a 10uF output capacitor with ESR of 200mΩ or higher between VOUT and GND for stability. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-89 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage Accuracy | VOUT | -2 | | 2 | % | IL = 1mA, VIN = 5V | 4 |
| Current Limit (RT9161A) | ILIM | 500 | 900 | | mA | VIN = 5V, VOUT = 0V | 4 |
| Dropout Voltage (RT9161A, 500mA) | VDROP | | 750 | 1000 | mV | IL = 500mA (RT9161A column of 300/500mA) | 4 |
| Load Regulation (RT9161A, 500mA) | VLOAD | | 1 | 50 | mV | IL = 1mA to 500mA, VIN = 5V | 4 |
| Line Regulation | VLINE | | 2 | 3 | %VOUT | IL = 1mA, VIN = 4.5 to 12V | 4 |
| Standby Current | ISTANDBY | | 110 | 180 | A | IL = 0, VIN = 12V | 4 |
| Output Voltage Temperature Coefficient | | | 50 | 150 | PPM/C | | 4 |
| Input Voltage | | -0.3 | | 14 | V | | 4 |
| Operating Junction Temperature Range | TJ | -40 | | 125 | °C | | 4 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 4 |
| Power Dissipation (SOT-89) | PD | | | 0.571 | W | TA = 25°C | 4 |
| Thermal Resistance Junction-to-Ambient (SOT-89) | θJA | | 175 | | °C/W | Natural convection, TA = 25°C, JEDEC 51-3 low-effective single-layer board | 4 |
| Thermal Resistance Junction-to-Case (SOT-89) | θJC | | 100 | | °C/W | | 4 |
## CAD (KiCad official)
- Symbol: `RT9161A-33GX`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `rt9161a-33gx-etched.step` / `rt9161a-33gx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt9161a-33gx.step` / `rt9161a-33gx.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Richtek Tech datasheet](docs/rt9161a-33gx-datasheet.pdf) (12 pp, sha256 `f9ed17ff387f5129`, retrieved 2026-10-28, tier: manufacturer)
- **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/rt9161a-33gx-datasheet.pdf)