component
LP3994-33B3F
Public Made by Adomby adom
LOWPOWER Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLP3994-33B3F
LOWPOWER · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3
LP3994-33B3F from LOWPOWER, in a SOT-23-3. 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 | GND | power_in | Ground reference pin; the datasheet describes it only as ground and gives no further limits for this pin. |
| 2 | VOUT | power_out | Output pin; bypass with a 1μF or greater ceramic capacitor from this pin to ground, placed as close to the pin as possible. |
| 3 | VIN | power_in | Supply input pin; must be closely decoupled to GND with a 1μF or greater ceramic capacitor placed as close to the pin as possible, and the input operating range is 3.6V to 40V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage operation range | VIN | 3.6 | 40 | V | operation | 5 | |
| Output Voltage accuracy | VOUT | -1.5 | 1.5 | % | ILOAD=1mA | 5 | |
| Output Voltage (nominal, 3.3V variant) | VOUT | 3.3 | V | ILOAD=1mA | 5 | ||
| Output Voltage Load Regulation | RegLOAD | 10 | 17 | 25 | mV | ILOAD from 1mA to 150mA VIN=VOUT+1V | 5 |
| Output Voltage Load Regulation (LP3994-33B3F) | RegLOAD | 10 | 18 | 42 | mV | ILOAD from 1mA to 150mA LP3994-33B3F, VIN=5V | 5 |
| DC Supply Quiescent Current | IQ | 1.5 | 2.5 | μA | ILOAD=0mA | 5 | |
| Dropout Voltage | VDROP | 550 | mV | VOUT=3.3V, ILOAD=100mA | 5 | ||
| Dropout Voltage | VDROP | 850 | mV | VOUT=3.3V, ILOAD=150mA | 5 | ||
| Output Voltage Line Regulation | RegLINE | 0.01 | %/V | VIN=VOUT+1V~40V ILOAD=1mA | 5 | ||
| Maximum Load Current | ILOAD | 150 | mA | VIN=VOUT+1V | 5 | ||
| Short Current | ISHORT | 120 | mA | OUT short to GND | 5 | ||
| Output Noise | eN | 120 | μVRMS | 10Hz to 100kHz, ILOAD=30mA | 5 | ||
| Junction Temperature-Limit Protection | TJ_LIMIT | 150 | ℃ | 5 | |||
| Power Supply Rejection Ratio | PSRR | -45 | dB | 1kHz (COUT=1uF, ILOAD=10mA) | 5 | ||
| VOUT Temperature Coefficient | TCVOUT | 0.01 | %/℃ | 5 | |||
| IN Pin to GND | VIN | -0.3 | 44 | V | 4 | ||
| OUT Pin to GND | VOUT | -0.3 | 6 | V | 4 | ||
| Maximum Junction Temperature | TJ | 150 | ℃ | 4 | |||
| Operating Ambient Temperature Range | TA | -40 | 85 | ℃ | 4 | ||
| Maximum Soldering Temperature | 260 | ℃ | at leads, 10 sec | 4 | |||
| ESD HBM (Human Body Model) | 2 | KV | HBM | 4 | |||
| ESD MM (Machine Model) | 200 | V | MM | 4 | |||
| Maximum Power Dissipation SOT23-3 | PDmax | 500 | mW | TA ≤25℃, SOT23-3 | 4 | ||
| Maximum Power Dissipation SOT23-3 | PDmax | 320 | mW | TA=70℃, SOT23-3 | 4 | ||
| Maximum Power Dissipation SOT23-3 | PDmax | 260 | mW | TA=85℃, SOT23-3 | 4 | ||
| Thermal resistance junction-to-ambient | θJA | 250 | ℃/W | SOT23-3 | 4 | ||
| Input Voltage (recommended) | VIN | 3.6 | 40 | V | 4 | ||
| Operating Junction Temperature Range | TJ | -40 | 150 | ℃ | 4 | ||
| Ambient Temperature Range | TA | -40 | 85 | ℃ | 4 | ||
| Output capacitance (recommended) | COUT | 1 | 10 | μF | 9 | ||
| Output capacitor ESR (recommended) | ESR | 5 | 100 | mΩ | 9 |
CAD (KiCad official)
- Symbol:
LP3994-33B3F - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
lp3994-33b3f-etched.step/lp3994-33b3f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp3994-33b3f.step/lp3994-33b3f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LOWPOWER datasheet (12 pp, sha256
b3a554afddcaf7da, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).