# LM4040BIM7-2.5

**Texas Instruments** · Voltage Reference · SC-70-5

LM4040BIM7-2.5 from Texas Instruments, in a SC-70-5. 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 | Anode | power_in | The anode pin is normally grounded and must be the return path for the shunt reference; per the datasheet it is labeled as an output (O) in Table 4-1, but it functions as the common (ground-side) terminal. |
| 2 | * | unconnected | Pin 2 must be left floating or connected to pin 1 (Anode) because of a parasitic Schottky diode between pins 1 and 2 on SC70; TI recommends connecting it to the anode in applications with high EMI or significant high-frequency switching noise. |
| 3 | Cathode | power_out | Cathode is the shunt current input and regulated output voltage pin, and the reference is specified for shunt currents from 60 µA minimum to 15 mA maximum (IRMIN to IRMAX) with a 2.5 V reverse breakdown voltage. |
| 4 | NC | unconnected | Pin 4 is a no-connect pin and is not internally connected. |
| 5 | NC | unconnected | Pin 5 is a no-connect pin and is not internally connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SC-70-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `LM4040BIM7-2.5`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `lm4040bim7-2-5-etched.step` / `lm4040bim7-2-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4040bim7-2-5.step` / `lm4040bim7-2-5.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/lm4040-n) (84 pp, sha256 `5655b017c6397138`, retrieved 2026-10-10, 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:** 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/lm4040bim7-2-5-datasheet.pdf)