component
LM2576HVS-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+46@@ -0,0 +1,46 @@+# LM2576HVS-3.3++**UMW** · DC-DC Converters · TO-263-5++LM2576HVS-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 | Unregulated DC input supply. Operating range 4.5 V to 60 V for the HV version (absolute max 63 V). Requires a low-ESR input bypass capacitor to ground. |+| 2 | Output | output | Switching output from the internal 3 A power switch. Connects to the external catch diode (e.g. 1N5822) and to the LC filter (typ. 100 µH inductor, 1000 µF output cap) that produces the regulated 3.3 V rail. |+| 3 | GND | power_in | Device ground and return for the input/output capacitors. Also serves as the thermal path via the TO-263 tab. |+| 4 | Feedback | input | Output voltage feedback input to the internal error amplifier. On the fixed 3.3 V version, tie directly to the regulated output node; the internal divider sets Vout = 3.3 V (±4% over line/load). |+| 5 | ON/OFF | input | Active-low TTL shutdown input. Low or floating enables the regulator; drive high (up to VIN, min -0.3 V) to place the device in low-power standby (~50 µA typ.). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | TO-263-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `LM2576HVS-3.3S`+- `LM2576HVS-3.3HVS`+- `LM2576HVS-3.3T`++## CAD (KiCad official)++- Symbol: `LM2576HVS-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/lm2576hvs-3-3-datasheet.pdf) (18 pp, sha256 `10275fb18a78ad8b`, 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/lm2576hvs-3-3-datasheet.pdf)
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