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LM2596R-3.3
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HTC Korea TAEJIN Tech LM2596R 3 3 DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+48@@ -0,0 +1,48 @@+# LM2596R-3.3++**HTC Korea TAEJIN Tech LM2596R 3 3** · DC-DC Converters · TO-263-5++LM2596R-3.3 from HTC Korea TAEJIN Tech LM2596R 3 3, 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 | Positive input supply, 4.5V to 40V operating (45V absolute max). Requires a suitable input bypass capacitor (typ. 470uF, 50V aluminum electrolytic) close to the pin to supply the switching currents and suppress voltage transients. |+| 2 | VOUT | output | Emitter of the internal 3A NPN switch (the switching node). Saturation voltage Vsat is typically 1.16V at Iout=3A. Connects to the external inductor and catch diode; keep the copper area small to minimize EMI coupling into sensitive circuitry. |+| 3 | GND | power_in | Circuit ground pin. Should tie into a solid ground plane using short, wide traces along with the input capacitor, output capacitor, and catch diode return paths. |+| 4 | FEEDBACK | input | Senses the regulated output voltage to close the feedback loop. In the fixed 3.3V version this pin connects directly to the regulated 3.3V output; internal R2/R1 divider sets the 3.3V regulation point against the 1.23V internal reference. Feedback bias current is typically 12nA. |+| 5 | ON/OFF | input | TTL-compatible shutdown input. Threshold is typically 1.3V (VIH=2.0V min, VIL=0.6V max). Driving above threshold (up to +Vin) shuts the regulator off, dropping supply current to ~80uA (250uA max). Leaving open or holding below 1.3V enables the regulator. Absolute range -0.3V to +Vin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HTC Korea TAEJIN Tech LM2596R 3 3 |+| Package | TO-263-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `LM2596R-3.3`+- `LM2596R-3.3LM2596R-ADJ`+- `LM2596R-3.3LM2596T-3.3`+- `LM2596R-3.3LM2596T-ADJ`+- `LM2596R-3.3LM2596DP-ADJ`++## CAD (KiCad official)++- Symbol: `LM2596R-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:** [HTC Korea TAEJIN Tech LM2596R 3 3 datasheet](docs/lm2596r-3-3-datasheet.pdf) (8 pp, sha256 `c89f43dda8481acd`, 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/lm2596r-3-3-datasheet.pdf)
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