# LM2594N-ADJ

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

LM2594N-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 | NC | unconnected | No internal connection on this pin. |
| 2 | NC | unconnected | No internal connection on this pin. |
| 3 | NC | unconnected | No internal connection on this pin. |
| 4 | Feedback | input | Senses the regulated output voltage to complete the feedback loop; the absolute maximum feedback pin voltage is −0.3 V to 25 V. |
| 5 | ON/OFF | input | Pulling this pin below about 1.3 V turns the regulator on and pulling it above 1.3 V (up to a maximum of 25 V) shuts it down; leaving it open or tying it to ground keeps the regulator on. |
| 6 | Ground | power_in | Circuit ground for the regulator. |
| 7 | +VIN | power_in | Positive input supply for the switching regulator, which needs a suitable input bypass capacitor; the recommended supply range for the LM2594 is 4.5 V to 40 V (absolute maximum 45 V). |
| 8 | Output | output | Internal switch output that swings between (+VIN − VSAT) and approximately −0.5 V with duty cycle VOUT/VIN, and its PCB copper area should be kept to a minimum to limit coupling to sensitive circuitry. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM2594N-ADJ`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `lm2594n-adj-etched.step` / `lm2594n-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2594n-adj.step` / `lm2594n-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/lm2594) (48 pp, sha256 `f4ff0460f0a09cf3`, 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/lm2594n-adj-datasheet.pdf)