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TPS65251-1RHAR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+78@@ -0,0 +1,78 @@+# TPS65251-1RHAR++**Texas Instruments** · DC-DC Converters · VQFN-40-EP(6x6)++TPS65251-1RHAR from Texas Instruments, in a VQFN-40-EP(6x6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | RLIM3 | input | Current-limit setting for Buck 3; a resistor from this pin to ground sets the peak current limit on the output inductor. |+| 2 | SS3 | input | Soft-start pin for Buck 3; a small ceramic capacitor on this pin sets the converter soft-start time. |+| 3 | COMP3 | output | Buck 3 compensation pin; a series RC circuit on this pin completes the converter compensation network. |+| 4 | FB3 | input | Buck 3 feedback input; connect a divider set to 0.8 V from the converter output to ground. |+| 5 | SYNC | input | Synchronous clock input for the oscillator; connect to GND when not used. |+| 6 | ROSC | input | Oscillator set pin; the resistor sets the internal clock frequency, and if external synchronization is used it should be set to about 70% of the external clock frequency. |+| 7 | FB1 | input | Buck 1 feedback pin; connect a divider set to 0.8 V from the converter output to ground. |+| 8 | COMP1 | output | Buck 1 compensation pin; a series RC circuit on this pin completes the converter compensation network. |+| 9 | SS1 | input | Soft-start pin for Buck 1; a small ceramic capacitor on this pin sets the converter soft-start time. |+| 10 | RLIM1 | input | Current-limit setting pin for Buck 1; a resistor from this pin to ground sets the peak current limit on the output inductor. |+| 11 | EN1 | input | Enable pin for Buck 1; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up. |+| 12 | BST1 | input | Bootstrap pin for Buck 1; fit a 47-nF ceramic capacitor from this pin to the switching node. |+| 13 | VIN1 | power_in | Input supply for Buck 1; fit a 10-µF ceramic capacitor close to this pin. |+| 14 | LX1 | output | Switching node for Buck 1. |+| 15 | LX1 | output | Switching node for Buck 1. |+| 16 | LX2 | output | Switching node for Buck 2. |+| 17 | LX2 | output | Switching node for Buck 2. |+| 18 | VIN2 | power_in | Input supply for Buck 2; fit a 10-µF ceramic capacitor close to this pin. |+| 19 | BST2 | input | Bootstrap pin for Buck 2; fit a 47-nF ceramic capacitor from this pin to the switching node. |+| 20 | EN2 | input | Enable pin for Buck 2; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up. |+| 21 | RLIM2 | input | Current-limit setting for Buck 2; a resistor from this pin to ground sets the peak current limit on the output inductor. |+| 22 | SS2 | input | Soft-start pin for Buck 2; a small ceramic capacitor on this pin sets the converter soft-start time. |+| 23 | COMP2 | output | Buck 2 compensation pin; a series RC circuit on this pin completes the converter compensation network. |+| 24 | FB2 | input | Buck 2 feedback input; connect a divider set to 0.8 V from the converter output to ground. |+| 25 | LOW_P | input | Active-high low-power operation mode input for the TPS65251. |+| 26 | GND | power_in | Ground pin. |+| 27 | PGOOD | output | Power-good open-drain output, asserted after all converters are sequenced and within regulation; active-high by default, with polarity factory-selectable. |+| 28 | V7V | power_out | Internal supply; connect a 10-µF ceramic capacitor from this pin to ground. |+| 29 | V3V | power_out | Internal supply; connect a 3.3- to 10-µF ceramic capacitor from this pin to ground. |+| 30 | AGND | power_in | Analog ground; connect all GND pins and the power pad together. |+| 31 | GND | power_in | Ground pin. |+| 32 | VIN | power_in | Input supply pin (one of three VIN pins that share the input supply). |+| 33 | VIN | power_in | Input supply pin (one of three VIN pins that share the input supply). |+| 34 | VIN | power_in | Input supply pin (one of three VIN pins that share the input supply). |+| 35 | GND | power_in | Ground pin. |+| 36 | LX3 | output | Switching node for Buck 3. |+| 37 | LX3 | output | Switching node for Buck 3. |+| 38 | VIN3 | power_in | Input supply for Buck 3; fit a 10-µF ceramic capacitor close to this pin. |+| 39 | BST3 | input | Bootstrap pin for Buck 3; fit a 47-nF ceramic capacitor from this pin to the switching node. |+| 40 | EN3 | input | Enable pin for Buck 3; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up. |+| 41 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-40-EP(6x6) |+| Category | Power Management (PMIC) |+| Pins | 41 |++## CAD (KiCad official)++- Symbol: `TPS65251-1RHAR`+- Footprint: `Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm`+- 3D model: VQFN-40-EP(6x6) (KiCad packages3D, STEP)+- 3D model files: `tps65251-1rhar-etched.step` / `tps65251-1rhar-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps65251-1rhar.step` / `tps65251-1rhar.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tps65251-3) (47 pp, sha256 `ccc6de3dc205a000`, retrieved 2026-10-08, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/tps65251-1rhar-datasheet.pdf)
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Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "tps65251-1rhar",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "tps65251-1rhar.kicad_sym",+ "tps65251-1rhar.kicad_mod",+ "tps65251-1rhar.glb",+ "tps65251-1rhar.step",+ "tps65251-1rhar.lbr",+ "docs/hero.png",+ "docs/tps65251-1rhar-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "tps65251-1rhar-hero.glb",+ "tps65251-1rhar-hero.overlay.json"+ ],+ "component": {+ "mpn": "TPS65251-1RHAR",+ "manufacturer": "Texas Instruments",+ "package": "VQFN-40-EP(6x6)",+ "pin_count": 41,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/tps65251-3",+ "parts": {+ "symbol": "tps65251-1rhar.kicad_sym",+ "footprint": "tps65251-1rhar.kicad_mod",+ "model_3d": "tps65251-1rhar-hero.glb",+ "model_3d_plain": "tps65251-1rhar.glb",+ "model_3d_step": "tps65251-1rhar-etched.step",+ "model_3d_step_plain": "tps65251-1rhar.step",+ "lbr": "tps65251-1rhar.lbr"+ },+ "distributor_links": {+ "lcsc": "C702320",+ "digikey": "296-49345-2-ND",+ "mouser": "595-TPS65251-1RHAR"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T19:08:05Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-49345-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-TPS65251-1RHAR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "RLIM3",+ "type": "input",+ "description": "Current-limit setting for Buck 3; a resistor from this pin to ground sets the peak current limit on the output inductor."+ },+ {+ "number": "2",+ "name": "SS3",+ "type": "input",+ "description": "Soft-start pin for Buck 3; a small ceramic capacitor on this pin sets the converter soft-start time."+ },+ {+ "number": "3",+ "name": "COMP3",+ "type": "output",+ "description": "Buck 3 compensation pin; a series RC circuit on this pin completes the converter compensation network."+ },+ {+ "number": "4",+ "name": "FB3",+ "type": "input",+ "description": "Buck 3 feedback input; connect a divider set to 0.8 V from the converter output to ground."+ },+ {+ "number": "5",+ "name": "SYNC",+ "type": "input",+ "description": "Synchronous clock input for the oscillator; connect to GND when not used."+ },+ {+ "number": "6",+ "name": "ROSC",+ "type": "input",+ "description": "Oscillator set pin; the resistor sets the internal clock frequency, and if external synchronization is used it should be set to about 70% of the external clock frequency."+ },+ {+ "number": "7",+ "name": "FB1",+ "type": "input",+ "description": "Buck 1 feedback pin; connect a divider set to 0.8 V from the converter output to ground."+ },+ {+ "number": "8",+ "name": "COMP1",+ "type": "output",+ "description": "Buck 1 compensation pin; a series RC circuit on this pin completes the converter compensation network."+ },+ {+ "number": "9",+ "name": "SS1",+ "type": "input",+ "description": "Soft-start pin for Buck 1; a small ceramic capacitor on this pin sets the converter soft-start time."+ },+ {+ "number": "10",+ "name": "RLIM1",+ "type": "input",+ "description": "Current-limit setting pin for Buck 1; a resistor from this pin to ground sets the peak current limit on the output inductor."+ },+ {+ "number": "11",+ "name": "EN1",+ "type": "input",+ "description": "Enable pin for Buck 1; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up."+ },+ {+ "number": "12",+ "name": "BST1",+ "type": "input",+ "description": "Bootstrap pin for Buck 1; fit a 47-nF ceramic capacitor from this pin to the switching node."+ },+ {+ "number": "13",+ "name": "VIN1",+ "type": "power_in",+ "description": "Input supply for Buck 1; fit a 10-µF ceramic capacitor close to this pin."+ },+ {+ "number": "14",+ "name": "LX1",+ "type": "output",+ "description": "Switching node for Buck 1."+ },+ {+ "number": "15",+ "name": "LX1",+ "type": "output",+ "description": "Switching node for Buck 1."+ },+ {+ "number": "16",+ "name": "LX2",+ "type": "output",+ "description": "Switching node for Buck 2."+ },+ {+ "number": "17",+ "name": "LX2",+ "type": "output",+ "description": "Switching node for Buck 2."+ },+ {+ "number": "18",+ "name": "VIN2",+ "type": "power_in",+ "description": "Input supply for Buck 2; fit a 10-µF ceramic capacitor close to this pin."+ },+ {+ "number": "19",+ "name": "BST2",+ "type": "input",+ "description": "Bootstrap pin for Buck 2; fit a 47-nF ceramic capacitor from this pin to the switching node."+ },+ {+ "number": "20",+ "name": "EN2",+ "type": "input",+ "description": "Enable pin for Buck 2; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up."+ },+ {+ "number": "21",+ "name": "RLIM2",+ "type": "input",+ "description": "Current-limit setting for Buck 2; a resistor from this pin to ground sets the peak current limit on the output inductor."+ },+ {+ "number": "22",+ "name": "SS2",+ "type": "input",+ "description": "Soft-start pin for Buck 2; a small ceramic capacitor on this pin sets the converter soft-start time."+ },+ {+ "number": "23",+ "name": "COMP2",+ "type": "output",+ "description": "Buck 2 compensation pin; a series RC circuit on this pin completes the converter compensation network."+ },+ {+ "number": "24",+ "name": "FB2",+ "type": "input",+ "description": "Buck 2 feedback input; connect a divider set to 0.8 V from the converter output to ground."+ },+ {+ "number": "25",+ "name": "LOW_P",+ "type": "input",+ "description": "Active-high low-power operation mode input for the TPS65251."+ },+ {+ "number": "26",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin."+ },+ {+ "number": "27",+ "name": "PGOOD",+ "type": "output",+ "description": "Power-good open-drain output, asserted after all converters are sequenced and within regulation; active-high by default, with polarity factory-selectable."+ },+ {+ "number": "28",+ "name": "V7V",+ "type": "power_out",+ "description": "Internal supply; connect a 10-µF ceramic capacitor from this pin to ground."+ },+ {+ "number": "29",+ "name": "V3V",+ "type": "power_out",+ "description": "Internal supply; connect a 3.3- to 10-µF ceramic capacitor from this pin to ground."+ },+ {+ "number": "30",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground; connect all GND pins and the power pad together."+ },+ {+ "number": "31",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin."+ },+ {+ "number": "32",+ "name": "VIN",+ "type": "power_in",+ "description": "Input supply pin (one of three VIN pins that share the input supply)."+ },+ {+ "number": "33",+ "name": "VIN",+ "type": "power_in",+ "description": "Input supply pin (one of three VIN pins that share the input supply)."+ },+ {+ "number": "34",+ "name": "VIN",+ "type": "power_in",+ "description": "Input supply pin (one of three VIN pins that share the input supply)."+ },+ {+ "number": "35",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin."+ },+ {+ "number": "36",+ "name": "LX3",+ "type": "output",+ "description": "Switching node for Buck 3."+ },+ {+ "number": "37",+ "name": "LX3",+ "type": "output",+ "description": "Switching node for Buck 3."+ },+ {+ "number": "38",+ "name": "VIN3",+ "type": "power_in",+ "description": "Input supply for Buck 3; fit a 10-µF ceramic capacitor close to this pin."+ },+ {+ "number": "39",+ "name": "BST3",+ "type": "input",+ "description": "Bootstrap pin for Buck 3; fit a 47-nF ceramic capacitor from this pin to the switching node."+ },+ {+ "number": "40",+ "name": "EN3",+ "type": "input",+ "description": "Enable pin for Buck 3; a low level disables the converter, an open pin is pulled up weakly to V3V for automatic enable, and a small ceramic capacitor to ground adds a delayed start-up."+ },+ {+ "number": "41",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The exposed power pad (listed in Table 5-1 as 'PAD', 'Power pad. Connect to ground.') has no printed; Pin types are mapped to KiCad ERC classes from the datasheet's I/O column: supply inputs (VIN1-3, VI; Table 5-1 lists multiple pins under one signal name (LX1 14/15, LX2 16/17, VIN 32-34, LX3 36/37). Ea",+ "exposed pad 41 added from the footprint"+ ],+ "pages_sent": 9,+ "cost_usd": 0.0876,+ "at": "2026-10-08T19:07:33"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/tps65251-3",+ "pages": 47,+ "sha256": "ccc6de3dc205a000",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 41,+ "described": 41,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "tps65251-1rhar.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 6,+ 1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "tps65251-1rhar-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 6,+ 1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "745895e1d3918d71dc2593e74372f471f9a82e4ee45d1a18ac328d7c3cb5e79d",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}