LP3983SAB5F-08
Public Unreviewedby Ray
LOWPOWER Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownLP3983SAB5F-08
LOWPOWER · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
LP3983SAB5F-08 from LOWPOWER, in a SOT-23-5. 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 | VIN | power_in | Power input voltage. Recommended operating range 2 V to 6 V (absolute max 7 V). Decouple with a ≥1 µF (typ. 2.2 µF) low-ESR ceramic capacitor placed within 0.5 inch of this pin and returned to a clean analog ground. |
| 2 | GND | power_in | Device ground. Return for the internal reference, bandgap, and pass element; connect to a clean analog ground plane. |
| 3 | EN | input | Chip enable, active high. VIH ≥ 1.4 V turns the regulator on; VIL ≤ 0.4 V places it into shutdown (<0.1 µA typ). An integrated 1 MΩ pull-down to GND holds the part off when EN is floating. Tie to VIN for always-on operation. Absolute max: -0.3 V to VIN+0.3 V. |
| 4 | ADJ | input | Adjustable feedback input. Connect the midpoint of an external R1/R2 divider from VOUT to GND to set the output: Vout = VFB × (1 + R1/R2), with VFB = 0.8 V (typ). A small 22 pF / 47 pF feed-forward capacitor across R1 reduces output ripple and improves transient response. |
| 5 | VOUT | power_out | Regulated output. Delivers up to 300 mA continuous (550 mA current limit). Requires a low-ESR ceramic output capacitor of ≥1 µF (typ. 2.2 µF, ESR > 25 mΩ recommended) placed within 0.5 inch of this pin for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
LP3983SAB5F-08
CAD (KiCad official)
- Symbol:
LP3983SAB5F-08 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lp3983sab5f-08.step |
85 KB | You want the bare part, or you mark your own boards. |
lp3983sab5f-08-etched.step |
3.0 MB | You want the part with LP3983SAB5F-08 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 705 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LOWPOWER datasheet (8 pp, sha256
093db1b43b089814, 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).