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LP2951ACD-3.3R2G

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by Ray

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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LP2951ACD-3.3R2G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8

LP2951ACD-3.3R2G from onsemi, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Output power_out Regulated 3.3 V output, up to 100 mA. Requires a minimum 1.0 µF output capacitor for stability; internal current and thermal limiting protect the pass device.
2 Sense input Kelvin sense connection to the regulated output. In the fixed-voltage configuration this pin ties to the Output pin (pin 1) at the load to remove wiring-drop errors from regulation.
3 Shutdown input Logic-level shutdown input. Logic 0 (0-0.7 V) enables the regulator; Logic 1 (2.0-30 V) disables the pass device (regulator Off). Absolute range −0.3 V to +30 V.
4 GND power_in Device ground reference for the bandgap, error amplifier and internal supply-bias current (~93 µA at 100 µA load).
5 Error output Open-collector /ERROR flag; pulls low when the output falls out of regulation (~5% low). VOL ≤ 250 mV at 400 µA sink; leakage ≤ 1 µA at VOH = 30 V. Usable as a power-on reset to a microprocessor.
6 VO_Tap passive Output-voltage-programming tap. Node between the internal 182 k / 60 k feedback divider brought out for use as a fixed 3.3 V regulator (tie to Output/Sense) or to program 1.25 V-29 V with an external divider.
7 Feedback input Error-amplifier inverting input, tied through the internal divider to the 1.235 V bandgap reference. Absolute range −1.5 V to +30 V; IFB typ 15 nA (40 nA max).
8 Input power_in Unregulated supply input. Operating range up to 30 Vdc (32 V peak transient <300 ms). Dropout ≈ 380 mV at 100 mA; regulator functional down to VIN ≈ VOUT + 0.4 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LP2951ACD-3.3R2G
  • LP2951CD-3.3
  • LP2951ACDM-3.3
  • LP2951CDM-3.3
  • LP2951ACN-3.3
  • LP2951CN-3.3
  • LP2951ACD-3.3R2GNCV2951ACD-3.3R2
  • LP2951ACD-3.3R2GNCV2951CD-3.3R2
  • LP2951ACD-3.3R2GNCV2951ACDR2
  • LP2951ACD-3.3R2GNCV2951CDR2
  • LP2950ACZ-3.3
  • LP2950CZ-3.3
  • LP2950ACDT-3.3
  • LP2950CDT-3.3

CAD (KiCad official)

  • Symbol: LP2951ACD-3.3R2G
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: onsemi datasheet (22 pp, sha256 e6fb01fe0fb19e47, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF