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lp2951g-s08-r

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by Ray

UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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LP2951G-S08-R

UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOP-8

LP2951G-S08-R from UTC Unisonic Tech, in a SOP-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 voltage output, up to 100mA. Connect to Sense (pin 2) at the load for remote sensing, or tie directly to Sense at the pin for local regulation. Requires a minimum output capacitor (typ. 1μF) for stability.
2 SENSE input Output sense input for the internal error amplifier feedback path. Connect to VOUT at the load (Kelvin sense) to compensate for IR drops in the output trace; must be connected - typically tied to pin 1 for local sensing.
3 SHUTDOWN input Active-high logic shutdown input, CMOS/TTL compatible. VIH ≥ 2.0V turns the regulator OFF; VIL ≤ 0.7V keeps it ON. Absolute max -0.3V to +30V; input current ~30μA at 2.4V, ~450μA at 30V.
4 GND power_in Device ground reference. Typical ground current ~120μA at IL=100μA and ~12mA at IL=100mA.
5 ERROR output Active-low, open-collector error flag output. Pulls low when the regulated output falls ~5% below nominal (out-of-regulation indicator). VOL ≤ 250mV at IOL = 400μA; leakage ≤ 1μA at VOH = 30V. Requires an external pull-up.
6 5V TAP output Tap point on the internal feedback divider (182kΩ / 60kΩ) that produces the 1.235V reference-based 5V setpoint. Tie to FEEDBACK (pin 7) to use the internal divider for a fixed 5V output; leave open when programming a custom output voltage with external resistors on pin 7.
7 FEEDBACK input Error-amplifier feedback input, regulated to the internal 1.235V reference (VREF 1.22-1.25V). For a fixed 5V output tie to pin 6 (5V TAP); for a programmable output use an external divider VOUT = 1.23V × (1 + R1/R2). IFB typ 20nA. Absolute max -1.5V to +30V.
8 INPUT power_in Unregulated DC supply input. Operating range up to 30V (absolute max -0.3V to +30V). Dropout voltage typ 50mV at IL=100μA and 380mV at IL=100mA.

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
Package SOP-8
Category PMIC
Pins 8

Ordering variants

  • LP2951G-S08-R
  • LP2951G-S08-RLP2951L-S08-R
  • LP2951G-S08-RLP2951G-D08-T
  • LP2951G-S08-RLP2951L-D08-T
  • LP2951G-S08-RLP2951G-P08-R
  • LP2951G-S08-RLP2951L-P08-R
  • LP2951G-S08-RLP2951G-SM1-R
  • LP2951G-S08-RLP2951L-SM1-R
  • LP2951G-S08-RLP2951G-K08-3030-R
  • LP2951G-S08-RLP2951L-K08-3030-R

CAD (KiCad official)

  • Symbol: LP2951G-S08-R
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: UTC Unisonic Tech datasheet (None pp, sha256 20a511b102c0511d, retrieved 2026-08-17, tier: lcsc)
  • 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

Symbol & Footprint

Schematic Symbol

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Datasheet

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