# LM2596MD5T-12

**HGSEMI** · DC-DC Converters · TO-252-5

LM2596MD5T-12 from HGSEMI, in a TO-252-5. 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 | Supply input requiring a 4.5V~40V DC supply (60V for HV types), with a large capacitor placed between this pin and ground to suppress supply noise. |
| 2 | OUTPUT | power_out | Power switch output, the switching node that supplies the output load. |
| 3 | GND | power_in | Ground pin; in layout it should sit on the ground path at the output point away from the Schottky diode so switching current spikes do not inject noise. |
| 4 | FEEDBACK | input | Voltage feedback pin that monitors the output voltage through a resistor divider network for regulation, with a 1.23V threshold voltage. |
| 5 | ON_OFF | input | Enable pin where a low level turns the chip on and a high level shuts it down, defaulting to low when floating (high threshold 1.4V, low threshold 0.8V). |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-252-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `LM2596MD5T-12`
- Footprint: `Package_TO_SOT_SMD:TO-252-5_TabPin6`
- 3D model: TO-252-5 (KiCad packages3D, STEP)
- 3D model files: `lm2596md5t-12-etched.step` / `lm2596md5t-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2596md5t-12.step` / `lm2596md5t-12.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756277738888552448) (17 pp, sha256 `986b3081cc1a4676`, 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-sonnet-5-5` (text+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/lm2596md5t-12-datasheet.pdf)