LMR54406DBVR

@@ -0,0 +1,48 @@+# LMR54406DBVR++**Texas Instruments** · DC-DC Converters · SOT-23-6++LMR54406DBVR from Texas Instruments, in a SOT-23-6. 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 | CB | passive | Bootstrap capacitor connection for the high-side FET driver. Connect a high quality 100nF capacitor from this pin to the SW pin. |+| 2 | GND | power_in | Power ground pin. Connected to the source of the low-side FET internally. Connect to system ground, ground side of CIN and COUT. The path to CIN must be as short as possible. |+| 3 | FB | input | Feedback input to the converter. Connect a resistor divider to set the output voltage (VFB = 0.8V typical, 0.79-0.81V). Never short this terminal to ground during operation. Absolute max -0.3V to 5.5V. |+| 4 | EN | input | Precision enable input to the converter. Do not float. High = on, low = off. Can be tied to VIN. Precision enable allows adjustable UVLO via external resistor divider (VEN rising ~1.23V, falling ~1.1V, 130mV hysteresis). |+| 5 | VIN | power_in | Supply input pin to the internal bias LDO and high-side FET. Operating range 4V to 36V (absolute max 45V DC, 50V transient). Connect to the input supply and input bypass capacitors CIN. Input bypass capacitors must be directly connected to this pin and GND. |+| 6 | SW | output | Switching output of the converter. Internally connected to the source of the high-side FET and drain of the low-side FET. Connect to the power inductor. High-side RDS(on) ~450 mΩ, low-side RDS(on) ~240 mΩ. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOT-23-6 |+| Category | Power Management (PMIC) |+| Pins | 6 |++## Ordering variants++Same part, different packaging or reel option.++- `LMR54406DBVR`+- `LMR54406DBVRFDBVR`++## CAD (KiCad official)++- Symbol: `LMR54406DBVR`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6 (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/lmr54406.pdf) (37 pp, sha256 `f0dc0ace8430cad9`, 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/lmr54406dbvr-datasheet.pdf)

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