TPS54331DR

@@ -0,0 +1,50 @@+# TPS54331DR++**Texas Instruments** · DC-DC Converters · SOIC-8++TPS54331DR from Texas Instruments, in a SOIC-8. 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 | BOOT | output | Bootstrap capacitor node for the high-side MOSFET gate driver. A 0.1-µF capacitor is required between BOOT and PH. When the capacitor voltage falls below the minimum, the high-side MOSFET is forced off to refresh the bootstrap capacitor. Absolute max 38 V; BOOT-PH max 8 V. |+| 2 | VIN | power_in | Main input supply pin, 3.5 V to 28 V operating range (absolute max 30 V). Provides power to the internal high-side MOSFET and control circuitry. |+| 3 | EN | input | Enable input. Float to enable; pull below 1.25 V (typ threshold) to disable. Can be programmed with two resistors to set an input undervoltage lockout with hysteresis. Absolute max 6 V. |+| 4 | SS | input | Slow-start pin. An external capacitor to GND sets the output voltage rise time; internal charge current is 2 µA typ. Absolute max 3 V. |+| 5 | VSENSE | input | Inverting input to the internal transconductance (gm) error amplifier. Connect to the output feedback resistor divider; regulates to the internal 0.8-V reference (0.772-0.828 V). Absolute max 3 V. |+| 6 | COMP | output | Error-amplifier output and PWM comparator input. Connect the loop compensation network (typically an R-C series with an optional parallel C) here. Absolute max 3 V. |+| 7 | GND | power_in | Device ground pin and power return. On the DDA (PowerPAD) package the exposed PowerPAD must also be tied to GND for proper operation; on the D (SOIC) package this is the sole ground connection. |+| 8 | PH | output | Switch node - source of the internal high-side power MOSFET. Connect to the external Schottky rectifier and inductor. Rated for 3-A continuous, absolute max −0.6 V to 30 V (−5 V for 10-ns transients). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `TPS54331DRDR`+- `TPS54331DRD`+- `TPS54331DRDDAR`+- `TPS54331DRDDA`++## CAD (KiCad official)++- Symbol: `TPS54331DR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tps54331.pdf) (41 pp, sha256 `cf72dfd0ac69eec6`, retrieved 2026-08-17, tier: manufacturer)+- **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/tps54331dr-datasheet.pdf)

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