# TMI5102

**TMI** · LED Drivers · SOT-23-5

TMI5102 from TMI, 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 | EN | input | Chip enable pin. Drive above 1.5V (V_IH) to turn the part on; drive below 0.4V (V_IL) to turn it off. Do not leave floating. Leakage typ ±0.01µA, max ±1.0µA. |
| 2 | GND | power_in | Ground return pin for the device. |
| 3 | LX | output | Power switch node output - connection to the external step-down inductor. Internal high-side PMOS RDS(on) typ 120mΩ, low-side NMOS typ 70mΩ. Peak current limit 2.5A typ. Absolute max -0.3V to 6.5V (transients to -3.5V/+7.5V for <5ns). |
| 4 | VIN | power_in | Power supply input, 2.5V to 5.5V operating range (abs max 6.5V, OVP threshold 6.0V typ, UVLO threshold 2.3V typ). Must be closely decoupled to GND with a 10µF or greater ceramic capacitor. |
| 5 | FB | input | Feedback pin. Regulated feedback voltage is 100mV typical. A current-sense resistor R1 connected between FB and GND programs LED current per ILED = VFB / R1 (e.g. 50mΩ → 2A). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TMI |
| Package | SOT-23-5 |
| Category | LED-drv |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TMI5102`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tmi5102-etched.step` / `tmi5102-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tmi5102.step` / `tmi5102.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TMI datasheet](docs/tmi5102-datasheet.pdf) (9 pp, sha256 `71e737f96cf49106`, 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).

[Datasheet PDF](docs/tmi5102-datasheet.pdf)