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AIC1221-33GY3TR

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AIC Analog Integrations Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AIC1221-33GY3TR

AIC Analog Integrations · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

AIC1221-33GY3TR from AIC Analog Integrations, in a SOT-223. 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 VIN power_in Power supply input pin; the datasheet recommends bypassing it with a 4.7µF capacitor to GND, and the input voltage range is 1.8V to 6V.
2 GND power_in Ground pin, which is also the metal tab (heat sink) of the SOT-223 package; the datasheet recommends connecting the bottom-side pad to a large ground plane for thermal conduction.
3 VOUT power_out Regulator output pin that sources up to 2A continuous output current.

Key specifications

Parameter Value
Manufacturer AIC Analog Integrations
Package SOT-223
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
Input Voltage VIN 1.8 6 V 6
Output Voltage Tolerance VOUT -2 2 % IOUT = 1mA 6
Continuous Output Current IOUT 2 A VIN ≧2.3V 6
Quiescent Current IQ 30 50 µA Chip Enable Low, VEN ≦0.4V, IOUT = 0 mA; Chip Enable High, VEN ≧1.6V, IOUT = 0 mA 6
GND Pin Current IGND 30 50 µA Chip Enable Low, VEN ≦0.4V, IOUT = 2A; Chip Enable High, VEN ≧1.6V, IOUT = 2A 6
Standby Current ISTBY 0.01 0.5 µA Chip Enable Low, VEN = VIN; Chip Enable High, VEN = 0 6
Output Current Limit IIL 2.2 3 3.9 A RLOAD = 0.1Ω 6
Dropout Voltage VDROP 550 700 mV IOUT = 2A, VOUT = 3.3V 6
Line Regulation VLIR 3 15 mV VIN = VOUT + 1V to 6V, IOUT = 1mA 6
Load Regulation VLOR 5 15 mV IOUT = 1mA to 2A 6
Shutdown Pin Current IEN 0 0.5 µA VEN = VIN or GND 7
Shutdown Exit Delay Time t 100 µs IOUT = 30mA 7
Max Output Discharge Resistance to GND during Shutdown RDSON_CLMP 20 100 Ω 7
Shutdown Input Threshold (Chip Enable High) VENH 1.6 V 7
Shutdown Input Threshold (Chip Enable Low) VENL 0.4 V 7
PGOOD Rise Threshold 90 93 % 7
PGOOD Hysteresis 3 10 % 7
PGOOD Sink Capability 0.2 0.4 V IPGOOD = 10mA 7
PGOOD Delay 0.5 5 ms 7
Operating Temperature Range -40 85 ºC 5
Maximum Junction Temperature 150 ºC 5
Storage Temperature Range -65 150 ºC 5
Lead Temperature (Soldering) 260 ºC Soldering, 10 sec 5
Thermal Resistance (Junction to Case), SOT-223 15 ºC /W 5
Current Fold Back ICFB 1 A RLOAD = 0.1Ω 6
Ripple Rejection PSRR 70 dB f = 1KHz, Ripple = 0.5Vp-p 6
Temperature Coefficient TC 50 ppm/℃ 6
Thermal Shutdown Temperature TSD 150 ℃ VIN = VOUT + 1V 6
Thermal Shutdown Hysteresis TSD 20 ℃ 6

CAD (KiCad official)

  • Symbol: AIC1221-33GY3TR
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: aic1221-33gy3tr-etched.step / aic1221-33gy3tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); aic1221-33gy3tr.step / aic1221-33gy3tr.glb are the bare package body.

Provenance

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

  • Datasheet: AIC Analog Integrations datasheet (17 pp, sha256 10f0f60c1eaeae22, retrieved 2026-10-17, tier: lcsc)
  • 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