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FS1117-3V3-2AF

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FOSAN Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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FS1117-3V3-2AF

FOSAN · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

FS1117-3V3-2AF from FOSAN, in a SOT-89-3L. 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 Vss/Adj power_in Vss/Adj is the ground/adjust terminal; the datasheet gives adjust pin current Iadj of 120 uA typical at IO=10mA and adjust current change of 5 uA at 1.5V<VI-VO<12V and IO=10mA.
2 Vo power_out Vo is the regulated output, specified for the 1117-3.3 version at 3.3 V nominal with 3.234 V to 3.366 V over 10mA<IO<1A and 5V<VI<12V.
3 Vi power_in Vi is the input, with an absolute maximum rating of 15 V and a 5V<VI<12V operating range for the 1117-3.3 version, with dropout of 1.1 V typical and 1.3 V maximum at IO=1A.

Key specifications

Parameter Value
Manufacturer FOSAN
Package SOT-89-3L
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
Output Voltage (1117-3.3), IO=10mA, VI=5V VO 3.251 3.3 3.35 V IO=10mA VI=5V 2
Output Voltage (1117-3.3), 10mA<IO<1A, 5V<VI<12V VO 3.234 3.3 3.366 V 10mA<IO<1A 5V<VI<12V 2
Line Regulation (1117-3.3) LNR 1 7 mV IO=10mA 1.5V<VI-VO<8.7V 2
Load Regulation (1117-3.3) LDR 13.2 mV 2
Dropout Voltage VD 1.1 1.3 V ΔVR=1% IO=1A 2
Adjust Pin Current Iadj 120 uA IO=10mA 2
Adjust Current Change ΔIadj 5 uA 1.5<VI-VO<12 IO=10mA 2
Min Load Current IL 7 mA VI=5V Vadj=0V 2
Quiescent Current Iq 2 5 mA VI=VO+1.25 2
Temperature Stability 0.5 % 2
Long Term Stability 0.3 % TA=125℃ 1000hrs 2
RMS Output Noise (% of Vout) 0.003 % TA=125℃ 2
Thermal Shutdown Hysteresis 25 ℃ 2
Input Voltage Vi 15 V 1
Operating Current IO 1000 mA 1
Thermal Resistance Junction-Ambient RΘJA 250 ℃/W 1
Solder Temperature Td 260 ℃ 1
Solder Time Td 10 S 1
Operating Ambient Temperature TA 85 ℃ 1
Junction and Storage Temperature TJ,Tstg -40 125 ℃ 1

CAD (KiCad official)

  • Symbol: FS1117-3V3-2AF
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: fs1117-3v3-2af-etched.step / fs1117-3v3-2af-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fs1117-3v3-2af.step / fs1117-3v3-2af.glb are the bare package body.

Provenance

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

  • Datasheet: FOSAN datasheet (4 pp, sha256 a10b2a24826359fa, retrieved 2026-10-21, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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