# LM4132BMFX-4.1

**Texas Instruments** · Voltage Reference · SOT-23-5

LM4132BMFX-4.1 from Texas Instruments, in a SOT-23-5. 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 | N/C | unconnected | No-connect pin that should be left floating. |
| 2 | GND | power_in | Ground reference for the device. |
| 3 | EN | input | Enable pin: drive between 65% of VIN and VIN to enable VREF, or between 0 V and 35% of VIN to shut down (about 3 µA); it has an internal pullup of about 2 µA, may be left floating or tied to VIN, and must not be driven above VIN. |
| 4 | VIN | power_in | Input supply, which must be between VREF + 400 mV and 5.5 V (maximum input supply 5.5 V) and be bypassed with a input capacitor placed close to the device. |
| 5 | VREF | power_out | Precision reference output, rated for up to 20 mA load current for the LM4132 family and stable with low-ESR ceramic capacitors. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM4132BMFX-4.1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lm4132bmfx-4-1-etched.step` / `lm4132bmfx-4-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4132bmfx-4-1.step` / `lm4132bmfx-4-1.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/lm4132) (44 pp, sha256 `4bd8402ff026fdf1`, retrieved 2026-10-08, 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/lm4132bmfx-4-1-datasheet.pdf)