U3213D

@@ -0,0 +1,47 @@+# U3213D++**UNI SEMIC** · DC-DC Converters · SOP-7++U3213D from UNI SEMIC, in a SOP-7. 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 | VDD | power_in | Chip supply pin, also serves as the output voltage feedback node when FB is left floating. Recommended 100nF ceramic decoupling capacitor. VDD regulation ~15V, VDD_OVP ~19V, internal 25V clamp. |+| 2 | EN | input | Enable input. Drive logic high (~1V typ) to enable the IC; drive logic low to disable and enter shutdown mode. |+| 3 | FB | input | Feedback input pin. Leave floating for default 15V output; otherwise tie to a resistor divider from Vout to set the regulated output voltage (V_FB OLP threshold ~0.5V). |+| 4 | CS | input | Peak current sense pin (V_iPK ~300mV threshold). Leave floating for the default 1.2A internal current limit, or connect a sense element to set a custom peak current. Datasheet labels this pin I/O 'O' but it functions as a current-sense input. |+| 5 | Drain | power_in | Drain of the internal 150V/3A high-voltage MOSFET (200V startup capable). Pins 5 and 6 are internally tied together and connect to the switching node / HV DC input in a buck topology. |+| 6 | Drain | power_in | Drain of the internal 150V/3A high-voltage MOSFET. Internally tied to pin 5; both should be connected together on the PCB for current handling and thermal dissipation. |+| 8 | GND | power_in | Chip reference ground. Pin 7 is absent in the SOP-7 package. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UNI SEMIC |+| Package | SOP-7 |+| Category | PMIC |+| Pins | 7 |++## Ordering variants++- `U3213D`++## CAD (KiCad official)++- Symbol: `U3213D`+- Footprint: `Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm`+- 3D model: SOP-7 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UNI SEMIC datasheet](docs/u3213d-datasheet.pdf) (11 pp, sha256 `16c525c46eb3e00c`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/u3213d-datasheet.pdf)

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