LMR51430

@@ -0,0 +1,48 @@+# LMR51430++**Texas Instruments** · Switching regulator (buck) · SOT-23-6++Synchronous buck converter that steps a 4 to 36 V input down to a regulated rail at up to 3 A, in a small SOT-23-6 with both MOSFETs integrated. A resistor divider at FB sets the output, EN gives an adjustable enable threshold, and a bootstrap cap at CB drives the high-side switch. The wide input and small footprint suit it to point-of-load rails off a 12 or 24 V bus. A compact, low-part-count buck for space-limited boards.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Power ground terminal. Connects to the source of the low-side FET internally. Connect to system ground and the ground side of CIN and COUT; the path to CIN must be as short as possible. |+| 2 | SW | power_out | Switching output of the converter. Connects internally to the source of the high-side FET and drain of the low-side FET. Connect this pin to the power inductor. Rated -0.3 V to 38 V DC (transient -3.0 V for < 20 ns). |+| 3 | VIN | power_in | Supply input terminal to internal bias LDO and high-side FET. Operating range 4.5 V to 36 V (abs max 38 V). Input bypass capacitors CIN must be directly connected between this pin and GND. |+| 4 | FB | input | Feedback input to the converter. Connect a resistor divider from VOUT to set the output voltage; internal reference is 0.6 V typical (0.591 V to 0.609 V). Never short this pin to ground during operation. |+| 5 | EN | input | Precision enable input. Do not float. High = on, low = off. Rising threshold ~1.227 V, falling ~1.08 V. Can be tied to VIN or used with an external divider to set adjustable UVLO. If left floating, the device is disabled. |+| 6 | CB | passive | Bootstrap capacitor connection for the high-side FET driver. Connect a high-quality 100-nF capacitor from this pin to the SW pin. CB to SW rated max 5.5 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Synchronous step-down converter |+| Input | 4-36 V |+| Output current | 3 A |+| Integrated FETs | Yes (high + low side) |+| Control | FB divider, EN, bootstrap (CB) |+| Package | SOT-23-6 |++## Ordering variants++- `LMR51430XDBVR (SOT-23-6, FPWM)`+- `LMR51430YDBVR (SOT-23-6, auto mode)`++## CAD (KiCad official)++- Symbol: `Regulator_Switching:LMR51430 (KiCad official)`+- 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/lmr51430.pdf) (33 pp, sha256 `f7d8053844fb07ae`, 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/lmr51430-datasheet.pdf)

@@ -0,0 +1,38 @@+{+  "slug": "lmr51430",+  "version": "0.1.0",+  "type": "component",+  "description": "TI 3 A synchronous step-down converter, SOT-23-6. 4-36 V in, integrated FETs, small solution. Datasheet-verified.",+  "tags": [+    "component",+    "power",+    "buck-converter",+    "switching-regulator",+    "dc-dc",+    "sot-23-6",+    "texas-instruments"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "lmr51430.kicad_sym",+    "lmr51430.kicad_mod",+    "lmr51430.glb",+    "lmr51430.step",+    "lmr51430.lbr",+    "docs/hero.png",+    "docs/lmr51430-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file