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RS3219-1.8YF3

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Jiangsu RUNIC Tech Linear Voltage Regulators (LDO), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RS3219-1.8YF3

Jiangsu RUNIC Tech · Linear Voltage Regulators (LDO) · SOT-23

RS3219-1.8YF3 from Jiangsu RUNIC Tech, in a SOT-23. 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 for the regulator.
2 OUT power_out Regulator output, fixed 1.8V for this version, up to 300 mA output current.
3 IN power_in Regulator input; supply voltage can range from 2.5V to 5.5V, bypass with a 1μF capacitor to GND.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOT-23
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
Input Voltage VIN 2.5 5.5 V +25 4
Output Voltage Accuracy -3 6 % IOUT = 0.1mA, +25 4
Maximum Output Current 300 mA +25 4
Current Limit ILIM 300 500 mA +25 4
Ground Pin Current IQ 100 200 µA No load, EN = 2V, +25 4
Line Regulation ΔVLNR 0.03 0.09 %/V VIN = 2.5V or (VOUT + 0.5V) to 5.5V, IOUT = 1mA, +25 4
Load Regulation ΔVLDR 0.002 0.005 %/mA IOUT =0.1mA to 300mA, COUT = 1µF, +25 4
EN Input Threshold High VIH 0.7 xVIN VIN = 2.5V to 5.5V, VEN = -0.3V to VIN, Full 4
EN Input Threshold Low VIL 0.3 xVIN VIN = 2.5V to 5.5V, VEN = -0.3V to VIN, Full 4
EN Input Bias Current IB(SHDN) 0.01 1 μA EN = 0V or EN = 5.5V, +25 4
Input Voltage (recommended) VIN 2.5 5.5 V 3
Output Voltage (recommended) VOUT 1.2 5 V 3
Enable Input Voltage (recommended) VEN 0 V max is VIN 3
Output Current IOUT 0 300 mA 3
Junction Temperature (recommended) TJ -40 85 °C 3
Input voltage VIN -0.3 6 V 3
Output voltage VOUT -0.3 V max is VIN + 0.3 3
Enable input voltage VEN -0.3 V max is VIN 3
Junction temperature TJ 150 °C 3
Storage temperature Tstg -65 150 °C 3
ESD HBM V(ESD) -2000 2000 V Human-body model (HBM) 3
ESD MM V(ESD) -200 200 V Machine model (MM) 3
Shutdown Supply Current IQ(SHDN) 0.01 μA EN = 0.4V, Full 4
Output Voltage Noise en 28 µVRMS f = 10Hz to 100kHz, CBP = 0.1µF, COUT = 10µF, +25 4
PSRR at 217Hz PSRR 67 dB CBP = 0.1μF, ILOAD = 50mA, COUT = 1μF, VIN = VOUT+1V, f = 217Hz, +25 4
PSRR at 1kHz PSRR 64 dB CBP = 0.1μF, ILOAD = 50mA, COUT = 1μF, VIN = VOUT+1V, f = 1kHz, +25 4
Shutdown Exit Delay 30 μs CBP = 0.01μF, COUT = 1μF, No Load, +25 4
Thermal Shutdown Temperature TSHDN 150 °C 4
Thermal Shutdown Hysteresis ΔTSHDN 15 °C 4

CAD (KiCad official)

  • Symbol: RS3219-1.8YF3
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: rs3219-1-8yf3-etched.step / rs3219-1-8yf3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs3219-1-8yf3.step / rs3219-1-8yf3.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Jiangsu RUNIC Tech datasheet (11 pp, sha256 36faed9853e9bf69, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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