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LM2575HVS-3.3
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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+59@@ -0,0 +1,59 @@+# LM2575HVS-3.3++**UMW** · DC-DC Converters · TO-263-5++LM2575HVS-3.3 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 from 4.75V up to 60V for the HV variant (absolute max 63V). Bypass locally with a low-ESR bulk capacitor (typ. 680 μF for the 3.3V circuit). |+| 2 | Output | output | Switching output of the internal 2A power switch. Connects to the external catch diode (e.g. 1N5824 Schottky) and buck inductor (typ. 33 μH) that filter it into the regulated 3.3V rail. Rated 2A continuous with internal current limit; can swing to -1V during freewheel. |+| 3 | GND | power_in | Device ground. Common return for input, output and control circuitry. Also the primary thermal path through the tab of the TO-263 package. |+| 4 | Feedback | input | Output-voltage sense input for the internal error amplifier. On the fixed 3.3V version this pin ties directly to the regulated output node so the internal divider regulates VOUT to 3.3V (±4% over line and load). |+| 5 | ON/OFF | input | TTL-compatible shutdown control. Active low or floating enables the regulator; driving high (up to VIN, absolute max +VIN) forces the device into low-power standby mode (IQ typ. 50 μA). Do not exceed VIN on this pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | TO-263-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `LM2575HVS-3.3`+- `LM2575HVS-3.3LM2575S-3.3`+- `LM2575HVS-3.3LM2575HVS-5.0`+- `LM2575HVS-3.3LM2575S-5.0`+- `LM2575HVS-3.3LM2575HVS-12`+- `LM2575HVS-3.3LM2575S-12`+- `LM2575HVS-3.3LM2575HVS-ADJ`+- `LM2575HVS-3.3LM2575S-ADJ`+- `LM2575HVS-3.3LM2575HVT-3.3`+- `LM2575HVS-3.3LM2575T-3.3`+- `LM2575HVS-3.3LM2575HVT-5.0`+- `LM2575HVS-3.3LM2575T-5.0`+- `LM2575HVS-3.3LM2575HVT-12`+- `LM2575HVS-3.3LM2575T-12`+- `LM2575HVS-3.3LM2575HVT-ADJ`+- `LM2575HVS-3.3LM2575T-ADJ`++## CAD (KiCad official)++- Symbol: `LM2575HVS-3.3`+- 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/lm2575hvs-3-3-datasheet.pdf) (30 pp, sha256 `b0c31af439f0b6b9`, 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/lm2575hvs-3-3-datasheet.pdf)
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