TPS54231DR

@@ -0,0 +1,48 @@+# TPS54231DR++**Texas Instruments** · DC-DC Converters · SOIC-8++TPS54231DR 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 | passive | Bootstrap capacitor node for the high-side MOSFET gate drive. 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 switches off until the capacitor is refreshed. BOOT abs max 38 V; BOOT-PH abs max 8 V. |+| 2 | VIN | power_in | Input supply voltage pin, 3.5 V to 28 V operating range. Absolute maximum 30 V. Provides power to the internal high-side MOSFET and controller. |+| 3 | EN | input | Enable input. Pull below 1.25 V to disable the device; float to enable. Can be programmed with two external resistors to set the input UVLO threshold. Enable threshold typ 1.25 V, max 1.35 V; abs max 6 V. |+| 4 | SS | passive | Slow-start pin. An external capacitor to GND sets the output voltage rise time during startup. Charge current typ 2 µA; SS-to-VSENSE matching 10 mV; abs max 3 V. |+| 5 | VSENSE | input | Inverting input of the transconductance (gm) error amplifier. Connects to the external resistor divider from VOUT to program the output voltage. Internal reference 0.8 V (0.772/0.828 V min/max). Abs max 3 V. |+| 6 | COMP | output | Error-amplifier output and PWM comparator input. External frequency compensation network (R/C) connects here to shape the loop response. Abs max 3 V. |+| 7 | GND | power_in | Device ground return for internal circuitry and power stage. |+| 8 | PH | power_out | Switch node - source of the internal high-side power MOSFET. Connects to the external inductor and catch diode. Rated to 2-A continuous output current; PH abs max 30 V (−0.6 V DC, −5 V for 10-ns transient). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `TPS54231DRDR`+- `TPS54231DRD`++## CAD (KiCad official)++- Symbol: `TPS54231DR`+- 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/tps54231.pdf) (35 pp, sha256 `401b0451b9771a05`, 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/tps54231dr-datasheet.pdf)

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