# LP2985IM5-3.6

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

LP2985IM5-3.6 from Texas Instruments, 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 | Input supply pin. Operating range 2.5V to 16V (new chip); absolute maximum 18V. Requires a ≥1µF ceramic capacitor to ground placed within 1cm of the pin. |
| 2 | GND | power_in | Ground reference for the regulator. All bypass and load return currents flow through this pin. |
| 3 | ON/OFF | input | Active-high enable input for the LDO. Drive high (>0.85V typ, new chip) to enable; drive low (<0.72V typ, new chip) to disable. Tie to VIN if the enable feature is unused. Absolute max 18V (new chip). |
| 4 | BYPASS | passive | Noise-bypass pin connected to the internal 1.2V bandgap reference. Connect an external 10nF capacitor (ceramic NPO/COG or film) to ground to reduce reference noise and achieve 30µVRMS output noise. Leakage through this cap must remain <100nA. Absolute max 3V (new chip). |
| 5 | VOUT | power_out | Regulated 3.6V output, up to 150mA. Requires a ≥2.2µF ceramic output capacitor (1µF to 200µF range for new chip) with ESR <1Ω placed within 1cm of the pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `LP2985IM5-3.6/NOPB`
- `LP2985AIM5-3.6/NOPB`
- `LP2985IM5X-3.6/NOPB`
- `LP2985AIM5X-3.6/NOPB`
- `LP2985AIM5X-3.6/M3`

## CAD (KiCad official)

- Symbol: `LP2985IM5-3.6`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lp2985im5-3-6-etched.step` / `lp2985im5-3-6-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp2985im5-3-6.step` / `lp2985im5-3-6.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/lp2985-n) (None pp, sha256 `4ed752a80523dfe4`, retrieved 2026-08-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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).

[Datasheet PDF](docs/lp2985im5-3-6-datasheet.pdf)