component
RT9166A-25GXL
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownRT9166A-25GXL
Richtek Tech · Linear Voltage Regulators (LDO) · SOT-89-3
RT9166A-25GXL 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 for the regulator, to be tied to the external circuit ground at a single point. |
| 2 | VIN | power_in | Supply input (also the tab on the L-Type package), recommended operating range 2.8V to 5.5V with 6.5V absolute maximum, needing about 1μF input capacitance placed less than 1 cm from the pin. |
| 3 | VOUT | power_out | Regulated output (fixed 2.5V for -25 option) delivering at least 600mA current limit for RT9166A, stable with 1μF to 4.7μF low-ESR ceramic output capacitor. |
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 | VOUT | 1 | 3 | % | IOUT = 1mA | 3 | |
| Current Limit (RT9166A) | ILIM | 600 | mA | RLOAD = 1 | 3 | ||
| Quiescent Current | IQ | 220 | 300 | µA | IOUT = 0mA | 3 | |
| Load Regulation (RT9166A) | VLOAD | 30 | 55 | mV | 1mA ≤ IOUT ≤ 600mA | 3 | |
| Dropout Voltage (RT9166A) | VDROP | 580 | mV | IOUT = 600mA | 3 | ||
| Line Regulation | VLINE | 0.2 | %/V | VIN = (VOUT + 0.3V) to 5.5V, IOUT = 1mA | 3 | ||
| Power Supply Rejection Rate | PSRR | 55 | dB | f = 1kHz, COUT = 1µF | 4 | ||
| Thermal Shutdown Temperature | TSD | 170 | °C | 4 | |||
| Thermal Shutdown Hysteresis | ΔTSD | 40 | °C | 4 | |||
| Supply Input Voltage (recommended) | VIN | 2.8 | 5.5 | V | 3 | ||
| Junction Temperature Range (recommended) | TJ | -40 | 125 | °C | 3 | ||
| Ambient Temperature Range (recommended) | TA | -40 | 85 | °C | 3 | ||
| Supply Input Voltage (absolute max) | VIN | 6.5 | V | 3 | |||
| Power Dissipation SOT-89 | PD | 0.571 | W | TA = 25°C | 3 | ||
| Lead Temperature | 260 | °C | Soldering, 10 sec. | 3 | |||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 3 | ||
| ESD Susceptibility HBM | 2 | kV | Human Body Model | 3 | |||
| Thermal Resistance Junction to Ambient SOT-89 | θJA | 175 | °C/W | JEDEC 51-3 single-layer test board, TA = 25°C | 3 | ||
| Thermal Resistance Junction to Case SOT-89 | θJC | 58 | °C/W | 3 |
CAD (KiCad official)
- Symbol:
RT9166A-25GXL - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
rt9166a-25gxl-etched.step/rt9166a-25gxl-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt9166a-25gxl.step/rt9166a-25gxl.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (16 pp, sha256
1d9800fc32250eea, retrieved 2026-10-31, 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).