# LM2575SX-12-JSM

**JSMSEMI** · DC-DC Converters · TO-263-5

LM2575SX-12-JSM from JSMSEMI, in a TO-263-5. 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 | VIN | power_in | Unregulated input supply pin, rated 4V to 40V operating (absolute maximum 45V). |
| 2 | OUTPUT | output | Switch output pin of the buck regulator; steady-state output voltage to common must not go below -1V. |
| 3 | COMMON | power_in | Common (ground) pin of the regulator; the package tab is also common. |
| 4 | FEEDBACK | input | Feedback sense input to the error amplifier, connected to the internal resistor divider on fixed-voltage options (12V for -12 option). |
| 5 | ON/OFF | input | Active-low shutdown input, allowed -0.3V to VIN, with logic low at 1.0V max (on) and standby current of 50uA typ when held at 5V (off). |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | TO-263-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `LM2575SX-12-JSM`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `lm2575sx-12-jsm-etched.step` / `lm2575sx-12-jsm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2575sx-12-jsm.step` / `lm2575sx-12-jsm.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [JSMSEMI datasheet](docs/lm2575sx-12-jsm-datasheet.pdf) (12 pp, sha256 `f4e598e0081d5190`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/lm2575sx-12-jsm-datasheet.pdf)