TPS54331DDAR

@@ -0,0 +1,51 @@+# TPS54331DDAR++**Texas Instruments** · DC-DC Converters · SOIC-8-EP++TPS54331DDAR from Texas Instruments, in a SOIC-8-EP. 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 internal high-side MOSFET gate driver. A 0.1-µF capacitor is required between BOOT and PH. If the BOOT-PH voltage falls below the minimum requirement, the high-side MOSFET is forced off until the capacitor is refreshed. Absolute max BOOT: 38 V; BOOT-PH: 8 V. |+| 2 | VIN | power_in | Input supply voltage pin, 3.5 V to 28 V recommended operating range (absolute max 30 V). Bypass close to the pin with a low-ESR ceramic capacitor. |+| 3 | EN | input | Enable input. Pull below 1.25 V to disable the converter; float to enable. May be driven from a resistor divider off VIN to program input UVLO. Absolute max 6 V. |+| 4 | SS | input | Slow-start pin. An external capacitor from SS to GND sets the output-voltage rise time, limiting inrush current during startup. |+| 5 | VSENSE | input | Inverting input of the internal transconductance (gm) error amplifier. Connected via the output-voltage feedback divider; the amplifier regulates VSENSE to the internal 0.8-V reference. |+| 6 | COMP | output | Error-amplifier output and PWM comparator input. Connect the frequency-compensation network (typically a series R-C plus optional high-frequency pole cap) between COMP and GND. |+| 7 | GND | power_in | Device ground. On the DDA package this pin must also be connected to the exposed PowerPAD for proper thermal and electrical operation. |+| 8 | PH | output | Switch node: source of the internal high-side power MOSFET. Connect to the inductor and to the cathode of the external freewheeling (catch) diode. Handles up to ~9-A source/sink transient current. |+| 9 | PowerPAD | power_in | Exposed thermal pad on the DDA package only. Must be connected to the GND pin (pin 7) and soldered to a PCB ground plane for proper electrical and thermal performance. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8-EP |+| Category | PMIC |+| Pins | 9 |++## Ordering variants++- `TPS54331DDARDDA`+- `TPS54331DDARDDAR`+- `TPS54331DDARD`+- `TPS54331DDARDR`++## CAD (KiCad official)++- Symbol: `TPS54331DDAR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8-EP (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/tps54331ddar.pdf) (36 pp, sha256 `94afb96d8b709e87`, 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/tps54331ddar-datasheet.pdf)

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