# TL4050B25IDCKR

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

TL4050B25IDCKR 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 | Anode (low-side return); connect to GND rail; in high-EMI applications TI recommends connecting the NC pin to this pin. |
| 2 | NC | unconnected | No internal connection; middle pin on left side of SC-70-5 body; leave unconnected or connect to Anode per high-EMI guidance. |
| 3 | CATHODE | power_out | Cathode; regulated 2.5 V shunt reference output; operating cathode current IZ = 60 μA (typ) to 15 mA (max); dynamic impedance ZZ = 0.3 Ω typ at IZ = 1 mA, 120 Hz. |
| 4 | NC | unconnected | No internal connection; bottom pin on right side of SC-70-5 body. |
| 5 | NC | unconnected | No internal connection; top pin on right side of SC-70-5 body; TI recommends connecting to Anode in high-EMI applications. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `TL4050B25IDCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `tl4050b25idckr-etched.step` / `tl4050b25idckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl4050b25idckr.step` / `tl4050b25idckr.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/tl4050a) (41 pp, sha256 `9518f91a68f71d48`, retrieved 2026-09-26, 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 0.2`, primary `claude-sonnet-4-6` (text+vision), consensus `claude-opus-4-7` (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/tl4050b25idckr-datasheet.pdf)