component
LM2576S-12
Public Made by Adomby adom
HGSEMI DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# LM2576S-12++**HGSEMI** · DC-DC Converters · TO-263-5++LM2576S-12 from HGSEMI, 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 15V-40V for LM2576 (up to 60V for LM2576HV). Bypass with a low-ESR 100µF electrolytic close to the pin. |+| 2 | Output | power_out | Switching output from the internal 3A NPN power switch. Connect to the catch Schottky diode (e.g. 1N5822) cathode and the LC output filter (typ. 100µH + 1000µF) that produces the regulated 12V rail. |+| 3 | Ground | power_in | Device power ground / signal return. Electrically common with the exposed TAB (tab is GND) - solder both to the ground plane for the thermal path. |+| 4 | Feedback | input | Regulation feedback input to the internal error amplifier. For the fixed 12V version, tie directly to the +12V output node; the internal divider sets the 1.23V bandgap reference for regulation. Bias current ~50nA (500nA max). |+| 5 | ON/OFF | input | Active-low TTL-compatible shutdown input. Logic LOW (VIL ≤ 1.0V) or grounded = regulator ON; logic HIGH (VIH ≥ 2.2V, up to VIN) = shutdown (~50µA standby current). Do not leave floating; tie to GND for always-on operation. |+| TAB | GND | passive | Exposed metal tab, internally connected to pin 3 (Ground). Provides the primary thermal path (RθJC(bot) ≈ 0.4°C/W); solder to a copper ground pour sized for the required θJA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | TO-263-5 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `LM2576S-12/TR`+- `LM2576S-12LM2576HVS-12/TR`+- `LM2576S-12LM2576T-12`+- `LM2576S-12LM2576HVT-12`+- `LM2576S-12LM2576TB-12`+- `LM2576S-12LM2576M-12/TR`+- `LM2576S-12LM2576ME-12/TR`+- `LM2576S-12LM2576DQ4-12/TR`++## CAD (KiCad official)++- Symbol: `LM2576S-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:** [HGSEMI datasheet](docs/lm2576s-12-datasheet.pdf) (14 pp, sha256 `eddc94f04fe787be`, 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/lm2576s-12-datasheet.pdf)
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