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FR9811S6

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Fitipower Integrated Tech DC-DC Converters, SOT23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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FR9811S6

Fitipower Integrated Tech · DC-DC Converters · SOT23-6

FR9811S6 from Fitipower Integrated Tech, in a SOT23-6. 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 BST passive High-side gate drive boost pin; a capacitor rated between 0.1uF and 1uF must be connected from this pin to LX to fully turn on the internal high-side NMOS.
2 GND power_in Ground pin.
3 FB input Voltage feedback input; connect FB and VOUT through a resistive divider, and the IC regulates FB at 0.6V (VFB 0.591V to 0.609V, 4.5V to 21V VIN).
4 SHDN input Enable input: pull high to turn the IC on and low to turn it off (EN low threshold 0.5V, high threshold 1.5V); connect to VIN through a 100kΩ resistor for self-startup.
5 VIN power_in Power supply input, specified at 4.5V to 21V (absolute maximum -0.3V to +22V); place input capacitors as close as possible between VIN and GND.
6 LX output Power switching node; connect the external inductor to this pin (absolute maximum -0.3V to VIN +0.3V).

Key specifications

Parameter Value
Manufacturer Fitipower Integrated Tech
Package SOT23-6
Category Power Management (PMIC)
Pins 6

CAD (KiCad official)

  • Symbol: FR9811S6
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT23-6 (KiCad packages3D, STEP)
  • 3D model files: fr9811s6-etched.step / fr9811s6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fr9811s6.step / fr9811s6.glb are the bare package body.

Provenance

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

  • Datasheet: Fitipower Integrated Tech datasheet (9 pp, sha256 a18864a82003c220, retrieved 2026-10-09, 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