component

UC2843BD1

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)uc2843bd1factory-2.0.0extractor-text
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README.md Initial commit: component/uc2843bd1 · Ray 1d ago
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UC2843BD1

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

UC2843BD1 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 COMP output Error amplifier output, made available for loop compensation, with the error amplifier output sink current rated at 10 mA maximum.
2 VFB input Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider; the analog inputs (pins 2 and 3) are rated -0.3 V to 5.5 V.
3 ISENSE input Input receiving a voltage proportional to inductor current, which the PWM uses to terminate output switch conduction; the analog input is rated -0.3 V to 5.5 V and the current-sense maximum input signal is 1 V typical.
4 RT/CT passive Oscillator timing pin, with resistor RT connected to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle; operation to 500 kHz is possible.
5 GROUND power_in Combined control circuitry and power ground, to which all voltages on the device are referenced.
6 OUTPUT output Drives the gate of a power MOSFET directly, sourcing and sinking peak currents of up to 1 A.
7 VCC power_in Positive supply of the control IC, rated at 30 V maximum from a low-impedance source; the supply is self-limiting when Ii is below 30 mA.
8 Vref power_out Reference output providing a trimmed 5.00 V (4.90 to 5.10 V over temperature for UC384XB; 4.95 to 5.05 V at 25 °C for UC284XB) with up to 50 mA, also supplying charging current for CT through RT.

Key specifications

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

CAD (KiCad official)

  • Symbol: UC2843BD1
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: uc2843bd1-etched.step / uc2843bd1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc2843bd1.step / uc2843bd1.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (15 pp, sha256 fedfd7362400f8b3, retrieved 2026-10-07, 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