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LP3981-30B5F

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LOWPOWER Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icslp3981-30b5ffactory-2.0.0extractor-text

Verified LP3981-30B5F

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 5 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LP3981-30B5F · SOT-23-5 · 5 pins
  • ✓copper: 5 copper pads, none touching another net
  • ✓datasheet: all 5 pin names found in the 6-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23-5
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-va6gqjdy/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: 5 pins = 5 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 5 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lp3981-30b5f.kicad_sym✓ lp3981-30b5f.kicad_mod✓ lp3981-30b5f.step
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Ray Publish 0.1.0 7660a39 9d ago

LP3981-30B5F

LOWPOWER · Linear Voltage Regulators (LDO) · SOT-23-5

LP3981-30B5F from LOWPOWER, in a SOT-23-5. 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 VIN power_in Power input voltage; datasheet recommends 2.5V to 5.5V supply input (absolute maximum 6V).
2 GND power_in Ground.
3 EN input Active-high chip enable, high impedance input; above 1.2V turns on, below 0.4V shuts down, and a 100kΩ pull-down to GND is needed when the control signal is floating.
4 NC unconnected No connection.
5 VOUT power_out Regulated output voltage (3.0V fixed for LP3981-30B5F), up to 300mA output current.

Key specifications

Parameter Value
Manufacturer LOWPOWER
Package SOT-23-5
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage Accuracy ΔVOUT -2 2 % IOUT = 1mA 3
Maximum output Current Imax 300 mA VEN=VIN,VIN>2.5V 3
Current Limit ILIM 360 400 mA RLOAD = 1Ω 3
Quiescent Current IQ 45 120 μA VEN ≥ 1.2V, IOUT = 0mA 3
Dropout Voltage VDROP 170 200 mV IOUT = 200mA, VOUT > 2.8V 3
Dropout Voltage VDROP 220 300 mV IOUT = 300mA, VOUT > 2.8V 3
Standby Current ISTBY 0.01 1 μA VEN = GND, Shutdown 3
EN Input Bias Current IIBSD 0.01 100 nA VEN = GND or VIN 3
EN Logic-Low Voltage VIL 0.4 V VIN=3V to 5.5V, Shutdown 3
EN Logic-High Voltage VIH 1.2 V VIN=3V to 5.5V, Start-Up 3
Line Regulation ΔVLINE 0.3 % VIN = (VOUT + 1V) to 5.5V, IOUT = 1mA 3
Load Regulation ΔVLOAD 2 % 1mA < IOUT < 300mA 3
Output Noise Voltage 100 uVRMS 10Hz to 100kHz, IOUT=200mA COUT=1µF 3
Power Supply Rejection Rate PSRR -76 dB f=100Hz, COUT=1µF, IOUT=50mA 3
Power Supply Rejection Rate PSRR -73 dB f=10kHz, COUT=1µF, IOUT=50mA 3
Thermal Shutdown Temperature TSD 150 °C 3
Supply Input Voltage 6 V 3
Power Dissipation PD 400 mW TA = 25°C, SOT-25 3
Lead Temperature 260 °C Soldering, 10 sec. 3
Storage Temperature Range -65 150 °C 3
ESD HBM 2 kV Human Body Mode 3
ESD MM 200 V Machine-Mode 3
Supply Input Voltage 2.5 5.5 V 3
EN Input Voltage 0 5.5 V 3
Operation Junction Temperature Range -40 125 °C 3
Operation Ambient Temperature Range -40 85 °C 3
Package Thermal Resistance θJA 250 °C/W SOT-25 3

CAD (KiCad official)

  • Symbol: LP3981-30B5F
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lp3981-30b5f-etched.step / lp3981-30b5f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3981-30b5f.step / lp3981-30b5f.glb are the bare package body.

Provenance

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

  • Datasheet: LOWPOWER datasheet (6 pp, sha256 bf3050f50c362057, retrieved 2026-10-31, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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