# LP3965EMP-1.8

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-5

LP3965EMP-1.8 from Texas Instruments, in a SOT-223-5. 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 | SD | input | Shutdown input: pulling it low (VSD ≤ 0.2V) turns the regulator off with about 15µA typical quiescent current, and its operating range is −0.3V to VIN+0.3V. |
| 2 | VIN | power_in | Input supply pin, specified for 2.5V to 7.0V operation, with a survival limit of −0.3V to +7.5V. |
| 3 | VOUT | power_out | Regulated output pin, with a survival limit of −0.3V to +7.5V; the output PMOS diode is forward biased if VOUT is forced above VIN. |
| 4 | SENSE/ADJ | input | On the LP3965 fixed-output versions this is a remote sense pin that improves regulation at the load, and on the ADJ version it is the output adjust pin; its maximum voltage is VOUT+0.3V. |
| 5 | GND | power_in | Ground pin for the regulator. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `LP3965EMP-1.8`
- Footprint: `Package_TO_SOT_SMD:SOT-223-5`
- 3D model: SOT-223-5, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.45 mm nominal SOT height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `lp3965emp-1-8-etched.step` / `lp3965emp-1-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp3965emp-1-8.step` / `lp3965emp-1-8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lp3965) (35 pp, sha256 `9d94020326becc42`, retrieved 2026-10-12, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/lp3965emp-1-8-datasheet.pdf)