# LM2674N-ADJ

**Texas Instruments** · DC-DC Converters · PDIP-8

LM2674N-ADJ from Texas Instruments, in a PDIP-8. 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 | CB | input | Bootstrap capacitor connection for the high-side driver; a 10nF good-quality capacitor is connected between the CB pin and the VSW pin. |
| 2 | NC | unconnected | No-connect pin with no internal connection. |
| 3 | NC | unconnected | No-connect pin with no internal connection. |
| 4 | FB | input | Feedback sense input; connect to the midpoint of the feedback divider to set VOUT on the ADJ version, or tie directly to the output capacitor on fixed-output versions. |
| 5 | ON/OFF | input | Regulator enable input: high = on, low = off; pull high or leave floating to enable the regulator, and the device is in shutdown when the pin is below 1.4V. |
| 6 | GND | power_in | Power ground pin connected to system ground; keep the distance to CIN short. |
| 7 | VIN | power_in | Power input to the high-side FET; connect to the supply and input bypass capacitor CIN, keeping the path from VIN to CIN and GND as short as possible. |
| 8 | VSW | output | Internal high-side FET source and switching node; connect to the inductor and the cathode of the external diode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM2674N-ADJ`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `lm2674n-adj-etched.step` / `lm2674n-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2674n-adj.step` / `lm2674n-adj.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/lm2674) (41 pp, sha256 `a9cee9aefd8786a1`, retrieved 2026-10-07, 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/lm2674n-adj-datasheet.pdf)