component

HSY8121BABC

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HXY MOSFET DC-DC Converters, SOT-23-6L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icshsy8121babcfactory-2.0.0extractor-text

Verified HSY8121BABC

by Ray · last 4 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

4 Nov 2026RayPublished by the parts factory: tier lcsc, 6 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: HSY8121BABC · SOT-23-6L · 6 pins
  • ✓copper: 6 copper pads, none touching another net
  • ✓datasheet: all 6 pin names found in the 8-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23-6
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-m444tz8x/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 6 pins = 6 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 6 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ hsy8121babc.kicad_sym✓ hsy8121babc.kicad_mod✓ hsy8121babc.step
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Symbol & Footprint

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Contents

README

markdown

HSY8121BABC

HXY MOSFET · DC-DC Converters · SOT-23-6L

HSY8121BABC from HXY MOSFET, in a SOT-23-6L. 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 Bootstrap pin; connect a 10nF capacitor from this pin to SW.
2 GND power_in Ground reference pin for the regulator.
3 FB input Feedback input; connect an external resistor divider from the output to this pin to set VOUT (VREF is 0.8V typical).
4 EN input Enable pin for the IC; drive high to enable the part and low to disable it, with an internal 1MΩ pull-down to GND.
5 VIN power_in Supply voltage input, specified 4.2V to 28V with a surge capability to 30V; bypass with a 4.7μF ceramic capacitor to GND.
6 SW output Inductor connection; connect the inductor between SW and the regulator output.

Key specifications

Parameter Value
Manufacturer HXY MOSFET
Package SOT-23-6L
Category Power Management ICs
Pins 6

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 Range 4.2 28 V 3
FB Voltage VFB 0.784 0.8 0.816 V 3
Input UVLO Rising 4.2 V Hysteresis=340mV 3
Input Supply Current 750 µA Vin=12V, Iout=0 3
Input Shutdown Current 7 14 µA 3
FB Input Current 0 1 µA 3
Switching Frequency 1000 kHz 3
Maximum Duty Cycle 99 % 3
Short Circuit Hiccup Time On Time 2 mS 3
Short Circuit Hiccup Time Off Time 6 mS 3
FB Hiccup Threshold 0.2 V 3
On Resistance (high side switch) 160 mΩ 3
On Resistance (low side switch) 95 mΩ 3
High Side Current Limit 3.5 A 3
SW Leakage Current 20 µA IN=SW=12V 3
EN Rising Threshold 1.5 V 3
EN Falling Threshold 1.3 V 3
EN Input Current 1 uA VEN=2V 3
Thermal Shutdown Rising 150 °C Hysteresis =40°C 3
IN, SW, EN Voltage -0.3 30 V 2
BST Voltage -0.3 V Printed as SW+6V (relative to SW) 2
FB Voltage -0.3 6 V 2
Operating Temperature Range -40 85 °C 2
Storage Temperature Range -55 150 °C 2
ESD HBM (Human Body Model) 2 KV 2
Thermal Resistance Junction-to-Case (SOT-23-6L) JC 90 °C/W 2

CAD (KiCad official)

  • Symbol: HSY8121BABC
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6L (KiCad packages3D, STEP)
  • 3D model files: hsy8121babc-etched.step / hsy8121babc-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hsy8121babc.step / hsy8121babc.glb are the bare package body.

Provenance

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

  • Datasheet: HXY MOSFET datasheet (8 pp, sha256 f0739a7c4b602d31, retrieved 2026-11-04, 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