component
RT9166A-33GXL
Public Made by Adomby adom
Richtek Tech Linear Voltage Regulators (LDO), SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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RT9166A-33GXL
Richtek Tech · Linear Voltage Regulators (LDO) · SOT-89-3
RT9166A-33GXL from Richtek Tech, in a SOT-89-3. 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 | Common ground; the datasheet's PCB layout section asks for a single-point ground connection to the input and output capacitor grounds. |
| 2 | VIN | power_in | Supply input, with recommended operating range 2.8V to 5.5V and absolute maximum supply input voltage of 6.5V; place the input capacitor (about 1μF) within 1 cm of this pin. |
| 3 | VOUT | power_out | Regulator output, delivering up to 600mA for the RT9166A (current limit 600mA minimum) and requiring a 1μF to 4.7μF X7R/X5R ceramic output capacitor to GND for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| 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 | ΔVOUT | -1 | 3 | % | IOUT = 1mA | 3 | |
| Current Limit (RT9166A) | ILIM | 600 | mA | RLOAD = 1Ω | 3 | ||
| Quiescent Current | IQ | 220 | 300 | μA | IOUT = 0mA | 3 | |
| Dropout Voltage (RT9166A) | VDROP | 580 | mV | IOUT = 600mA | 3 | ||
| Line Regulation | ΔVLINE | 0.2 | %/V | VIN = (VOUT + 0.3V) to 5.5V, IOUT = 1mA | 3 | ||
| Load Regulation (RT9166A) | ΔVLOAD | 30 | 55 | mV | 1mA < IOUT < 600mA | 3 | |
| Supply Input Voltage (recommended) | VIN | 2.8 | 5.5 | V | 3 | ||
| Junction Temperature Range | TJ | -40 | 125 | °C | 3 | ||
| Ambient Temperature Range | TA | -40 | 85 | °C | 3 | ||
| Supply Input Voltage (absolute maximum) | 6.5 | V | 3 | ||||
| Power Dissipation, SOT-89 | PD | 0.571 | W | TA = 25°C | 3 | ||
| Junction Temperature (absolute maximum) | 150 | °C | 3 | ||||
| Lead Temperature (soldering) | 260 | °C | 10 sec | 3 | |||
| Storage Temperature Range | -65 | 150 | °C | 3 | |||
| ESD Susceptibility HBM | 2 | kV | Human Body Model | 3 | |||
| Package Thermal Resistance, junction-to-ambient, SOT-89 | θJA | 175 | °C/W | Note 2, JEDEC 51-3 single-layer board, TA = 25°C | 3 | ||
| Package Thermal Resistance, junction-to-case, SOT-89 | θJC | 58 | °C/W | 3 |
CAD (KiCad official)
- Symbol:
RT9166A-33GXL - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (15 pp, sha256
71ca142da125ca29, 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).