component

STCH03TR

Public Made by Adom

by adom

STMicroelectronics AC-DC Controllers And Regulators, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)stch03trfactory-2.0.0extractor-text
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STCH03TR

STMicroelectronics · AC-DC Controllers And Regulators · SO-8

STCH03TR from STMicroelectronics, in a SO-8. 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 HV input High-voltage start-up input able to withstand 650 V with internal 7 mA current source charging the VDD capacitor at 50 V typ. until VDD reaches 17 V typ. turn-on threshold.
2 NC unconnected Not internally connected provision for PCB clearance to meet safety requirements.
3 FB input Control input for peak current control with burst-mode activation at 65 mV below VFBB threshold and maximum current sense threshold at VFBH level.
4 ZCD input Transformer demagnetization sensing input for quasi-resonant operation triggered by negative-going edge with maximum sink/source current of 3 mA and no capacitor connection allowed.
5 SENSE input Current sense input with internal 380 ns blanking time after gate-drive, compared with reference derived from FB pin voltage to determine MOSFET turn-off.
6 GND power_in Circuit ground reference and current return for both signal part and gate-drive.
7 GD output Gate-driver output with totem pole configuration for external power MOSFET.
8 VDD power_in Supply voltage input requiring electrolytic capacitor between VDD and GND plus 0.1 μF bypass capacitor.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: STCH03TR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: stch03tr-etched.step / stch03tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stch03tr.step / stch03tr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (27 pp, sha256 fc41ad1ced0066f6, retrieved 2026-10-03, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (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