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LP3982S-28B5F
Public Made by Adomby adom
LOWPOWER Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. 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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Contents
README
markdownLP3982S-28B5F
LOWPOWER · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
LP3982S-28B5F 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 | Supply input pin that must be closely decoupled to GND with a 1μF or greater ceramic capacitor placed as close to the pin as possible; input range is 2.2V to 5.5V. |
| 2 | GND | power_in | Ground pin. |
| 3 | EN | input | Active-high enable pin: driving EN over 1V turns on the regulator, and driving EN below 0.4V puts it into shutdown mode. |
| 4 | NC | unconnected | No connection. |
| 5 | VOUT | power_out | Output pin that must be bypassed with a 1μF or greater ceramic capacitor from this pin to ground, placed as close to the pin as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage Operation Range | VIN | 2.2 | 5.5 | V | 5 | ||
| Input Voltage (recommended operating) | VIN | 2.2 | 5.5 | V | 4 | ||
| Operating Junction Temperature Range | TJ | -40 | 150 | ℃ | 4 | ||
| Ambient Temperature Range | TA | -40 | 85 | ℃ | 4 | ||
| VIN Pin to GND | VIN | -0.3 | 6.5 | V | 4 | ||
| VOUT, EN Pin to GND | VOUT, EN | -0.3 | 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 Human Body Model | HBM | 4 | kV | 4 | |||
| ESD Charged Device Model | CDM | 1 | kV | 4 | |||
| Thermal Resistance (SOT23-5, θJA) | θJA | 220 | °C/W | 2S2P JEDEC PCB, ambient temperature < 25°C | 4 | ||
| Output Voltage Accuracy (2.8V) | VOUT | 2.772 | 2.8 | 2.828 | V | IOUT=1mA | 5 |
| Output Voltage Load Regulation | ΔVLOAD | 16 | 28 | mV | IOUT from 1mA to 300mA | 5 | |
| Max Load Current | IOUT_MAX | 300 | mA | VEN=VIN | 5 | ||
| Load Current Limit | ILIMIT | 400 | 550 | mA | VEN=VIN | 5 | |
| Short Current | ISHORT | 110 | mA | VEN=VIN, VOUT short to GND | 5 | ||
| Dropout Voltage (2.8V) | VDROP | 200 | mV | VOUT=2.8V, IOUT=300mA | 5 | ||
| DC Supply Quiescent Current | IQ | 58 | μA | IOUT=0mA | 5 | ||
| Shutdown Current | ISD | 0.6 | μA | VEN=0V | 5 | ||
| Inrush Current | IInrush | 400 | mA | COUT=10μF | 5 | ||
| Output Voltage Line Regulation | ΔVOUT/(ΔVIN × VOUT) | 0.01 | %/V | VIN=VOUT+0.5V~5.5V, IOUT=1mA | 5 | ||
| VOUT Temperature Coefficient | TCVOUT | 0.01 | %/℃ | IOUT=1mA | 5 | ||
| PSRR at 100Hz | PSRR | 80 | dB | VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=100Hz | 5 | ||
| PSRR at 1kHz | PSRR | 75 | dB | VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=1kHz | 5 | ||
| PSRR at 10kHz | PSRR | 60 | dB | VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=10kHz | 5 | ||
| PSRR at 100kHz | PSRR | 50 | dB | VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=100kHz | 5 | ||
| Output Noise (2.8V) | eN | 42 | μVRMS | 10Hz~100kHz, IOUT=20mA, VOUT=2.8V | 5 | ||
| Thermal Shutdown Threshold | TSD | 160 | ℃ | 6 | |||
| Thermal Shutdown Hysteresis | ΔTSD | 20 | ℃ | 6 | |||
| VOUT Rise Time | trise | 30 | μs | IOUT=0mA | 6 | ||
| Auto-discharge On-Resistance | RDISC | 850 | Ω | 6 | |||
| EN Logic High Voltage | VENH | 1 | V | 6 | |||
| EN Logic Low Voltage | VENL | 0.4 | V | 6 | |||
| EN Input Current | IEN | 120 | nA | VEN=0 to 5.5V | 6 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | output capacitors, and to the LDO ground pin as close to each other as possible with a wide and componentside copper surface. The use of vias and long traces to | 12 |
CAD (KiCad official)
- Symbol:
LP3982S-28B5F - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
lp3982s-28b5f-etched.step/lp3982s-28b5f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp3982s-28b5f.step/lp3982s-28b5f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LOWPOWER datasheet (18 pp, sha256
fcd4a32c06506e21, retrieved 2026-10-18, 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).