component
RS3219-1.2YF5
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Jiangsu RUNIC Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. 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
markdownRS3219-1.2YF5
Jiangsu RUNIC Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
RS3219-1.2YF5 from Jiangsu RUNIC 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 | IN | power_in | Regulator input; supply voltage can range from 1.7V to 7.5V, bypass with a 1μF capacitor to GND. |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable input; a logic low reduces the supply current to 10nA, connect to IN for normal operation. |
| 4 | NC | unconnected | No internal connection. |
| 5 | OUT | power_out | Regulator output. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC 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 |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | -0.3 | 8 | V | 6 | ||
| Output voltage | VOUT | -0.3 | V | max printed as VIN + 0.3 V | 6 | ||
| Enable input voltage | VEN | -0.3 | V | max printed as VIN | 6 | ||
| Junction temperature | TJ | 150 | °C | 6 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 6 | ||
| ESD HBM | V(ESD) | -6000 | 6000 | V | Human-body model | 6 | |
| ESD MM | V(ESD) | -500 | 500 | V | Machine model | 6 | |
| Input supply voltage | VIN | 1.7 | 7.5 | V | 6 | ||
| Output voltage | VOUT | 1.2 | 5 | V | 6 | ||
| Enable input voltage | VEN | 0 | V | max printed as VIN | 6 | ||
| Output current | IOUT | 0 | 300 | mA | 6 | ||
| Junction temperature | TJ | -40 | 85 | °C | 6 | ||
| Junction-to-ambient thermal resistance | RθJA | 250 | °C/W | SOT23-5 | 6 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 84.3 | °C/W | SOT23-5 | 6 | ||
| Junction-to-board thermal resistance | RθJB | 39.5 | °C/W | SOT23-5 | 6 | ||
| Junction-to-top characterization parameter | ψJT | 2.86 | °C/W | SOT23-5 | 6 | ||
| Junction-to-board characterization parameter | ψJB | 58.7 | °C/W | SOT23-5 | 6 | ||
| Power dissipation | Pd | 0.5 | W | SOT23-5 | 6 | ||
| Input Voltage | VIN | 1.7 | 7.5 | V | +25°C | 7 | |
| Output Voltage Accuracy | -2.5 | 2.5 | % | IOUT = 0.1mA, +25°C | 7 | ||
| Maximum Output Current | 300 | mA | +25°C | 7 | |||
| Ground Pin Current | IQ | 120 | 200 | µA | No load, EN = VIN, +25°C | 7 | |
| Dropout Voltage | 0.95 | mV | IOUT = 1mA, VOUT=3.3V, +25°C | 7 | |||
| Dropout Voltage | 280 | 400 | mV | IOUT = 300mA, VOUT=3.3V, +25°C | 7 | ||
| Line Regulation | ΔVLNR | 0.03 | 0.09 | %/V | VIN = 1.7V or (VOUT + 0.5V) to 5.5V, IOUT = 1mA, +25°C | 7 | |
| Load Regulation | ΔVLDR | 0.002 | 0.005 | %/mA | IOUT =0.1mA to 300mA, COUT = 1µF, +25°C | 7 | |
| EN Input Threshold high | VIH | 1.4 | V | VIN = 1.7V, Full | 7 | ||
| EN Input Threshold low | VIL | 0.3 | V | VIN = 1.7V, Full | 7 | ||
| EN Input Threshold high | VIH | 2 | V | VIN = 7.5V, Full | 7 | ||
| EN Input Bias Current | IB(SHDN) | 0.01 | 1 | µA | EN = 0V or EN = VIN, +25°C | 7 | |
| Output Voltage Noise | en | 38 | µVPP | f = 0.1Hz to 10Hz, COUT = 1µF, +25°C | 7 | ||
| Power Supply Rejection Ratio | PSRR | 56 | dB | ILOAD = 50mA, COUT = 1μF, VIN = VOUT+1V, f = 217Hz, +25°C | 7 | ||
| Power Supply Rejection Ratio | PSRR | 55 | dB | ILOAD = 50mA, COUT = 1μF, VIN = VOUT+1V, f = 1kHz, +25°C | 7 | ||
| Shutdown Supply Current | IQ(SHDN) | 0.01 | µA | EN = 0.4V, Full | 7 | ||
| Shutdown Exit Delay | 50 | µs | COUT = 1μF, No Load, +25°C | 7 | |||
| Thermal Shutdown Temperature | TSHDN | 150 | °C | 7 | |||
| Thermal Shutdown Hysteresis | ΔTSHDN | 15 | °C | 7 |
CAD (KiCad official)
- Symbol:
RS3219-1.2YF5 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
rs3219-1-2yf5-etched.step/rs3219-1-2yf5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rs3219-1-2yf5.step/rs3219-1-2yf5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (15 pp, sha256
e337efaf87a8be1f, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).