LP3987H-18B5F
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
markdownLP3987H-18B5F
LOWPOWER · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
LP3987H-18B5F 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, 2.5V to 6.0V operating range (6.5V absolute max). Requires a >=1uF ceramic/tantalum bypass capacitor located within 0.5 inch and returned to a clean analog ground. |
| 2 | GND | power_in | Device ground reference. Return both input and output capacitors to this pin via a clean analog ground. |
| 3 | EN | input | Chip enable, active high. VIH >= 1.4V starts the regulator; VIL <= 0.4V forces shutdown (<0.01uA typ standby). High-impedance input with an internal 1MΩ pull-down to GND so a floating EN defaults to OFF. Tie to VIN for always-on operation. |
| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND per PCB convenience. |
| 5 | VOUT | power_out | Regulated 1.8V output (LP3987H-18 variant), ±2% accuracy, 600mA rated with 800mA typical current limit. Requires a >=1uF low-ESR ceramic output capacitor (ESR up to 25mΩ typical) placed within 0.5 inch of the 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.
LP3987H-18B5F
CAD (KiCad official)
- Symbol:
LP3987H-18B5F - 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 |
|---|---|---|
lp3987h-18b5f.step |
85 KB | You want the bare part, or you mark your own boards. |
lp3987h-18b5f-etched.step |
2.4 MB | You want the part with LP3987H-18B5F already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 591 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
ba005df973b971fc, 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).