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LM2596S-12
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UMW DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+47@@ -0,0 +1,47 @@+# LM2596S-12++**UMW** · DC-DC Converters · TO-263-5++LM2596S-12 from UMW, in a TO-263-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VIN | power_in | Input supply voltage. Accepts unregulated DC input; operating range 4.75V to 40V (63V absolute max for HV variant). Bypass with a low-ESR bulk capacitor (typ. 680 uF) placed close to the pin. |+| 2 | Output | output | Switching output of the internal power switch. Connects to the external catch diode (e.g., 1N5822/1N5824 Schottky), inductor (typ. 33 uH for 12V out), and output filter capacitor. Delivers up to 3A load current; saturation voltage typ. 1.16V at 3A. |+| 3 | GND | power_in | Ground reference for the regulator. Also serves as the thermal path in the TO-263 (D2PAK) surface-mount package; connect to a copper ground plane for heat dissipation. |+| 4 | Feedback | input | Output voltage feedback sense pin. For the fixed 12V variant, connect directly to the regulated output node. Internal reference sets Vout = 12V (min 11.40V, max 12.60V over temperature). Absolute maximum -0.3V to +25V. |+| 5 | ON/OFF | input | TTL-compatible shutdown control. Active low: drive low or leave floating for normal operation; drive high (>~2.2V, up to 25V max) to enter standby mode (IQ typ. 80 uA). Internal pull-down keeps the device enabled when unconnected. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | TO-263-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `LM2596S-12`+- `LM2596S-12LM2596HVS-12`+- `LM2596S-12LM2596T-12`+- `LM2596S-12LM2596HVT-12`++## CAD (KiCad official)++- Symbol: `LM2596S-12`+- Footprint: `Package_TO_SOT_SMD:TO-263-2`+- 3D model: TO-263-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](docs/lm2596s-12-datasheet.pdf) (28 pp, sha256 `26d031e9696524e9`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm2596s-12-datasheet.pdf)
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