component
TPS51397ARJER
Public Made by Adomby adom
Texas Instruments DC-DC Converters, QFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+58@@ -0,0 +1,58 @@+# TPS51397ARJER++**Texas Instruments** · DC-DC Converters · QFN-20-EP(3x3)++TPS51397ARJER from Texas Instruments, in a QFN-20-EP(3x3). 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 | BST | power_out | Supply input for the gate drive voltage of the high-side MOSFET; connect a bootstrap capacitor between BST and SW, 0.1 μF recommended (VBST abs max 31 V). |+| 2 | VIN | power_in | Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND. |+| 3 | VIN | power_in | Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND. |+| 4 | VIN | power_in | Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND. |+| 5 | VIN | power_in | Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND. |+| 6 | SW | power_out | Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage. |+| 7 | PGND | power_in | Power ground terminal for the controller circuit and the internal circuitry. |+| 8 | PGND | power_in | Power ground terminal for the controller circuit and the internal circuitry. |+| 9 | PGOOD | output | Open-drain power-good indicator, asserted low if output voltage is out of PG threshold, over voltage, or during thermal shutdown, EN shutdown, or soft start. |+| 10 | NC | unconnected | Not connected internally; can be connected to the GND plane for better thermal performance. |+| 11 | SS | output | Soft-start time selection pin; an external capacitor sets the soft-start time, and with no capacitor it is about 1.2 ms. |+| 12 | EN | input | Enable input of the buck converter. |+| 13 | AGND | power_in | Ground of internal analog circuitry; connect to the GND plane with a short trace. |+| 14 | FB | input | Feedback sensing pin for the buck output voltage; connect to the resistor divider between output voltage and AGND (0.6 V reference). |+| 15 | MODE | input | Switching frequency and light load operation mode selection pin; connect to a resistor divider from VCC and AGND. |+| 16 | NC | unconnected | Not connected internally; can be connected to the GND plane for better thermal performance. |+| 17 | VCC | power_out | Powers the driver and control circuits; decouple with a minimum 1-μF ceramic capacitor as close to VCC as possible. |+| 18 | PGND | power_in | Power ground terminal for the controller circuit and the internal circuitry. |+| 19 | SW | power_out | Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage. |+| 20 | SW | power_out | Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage. |+| 21 | PGND | power_in | Thermal pad, power ground terminal for the controller circuit and the internal circuitry. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | QFN-20-EP(3x3) |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `TPS51397ARJER`+- Footprint: `Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm`+- 3D model: QFN-20-EP(3x3) (KiCad packages3D, STEP)+- 3D model files: `tps51397arjer-etched.step` / `tps51397arjer-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps51397arjer.step` / `tps51397arjer.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/tps51397a) (28 pp, sha256 `ace9eacb12e2228b`, retrieved 2026-10-03, 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-4-5-20251001` (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/tps51397arjer-datasheet.pdf)
page.jsonadded+238@@ -0,0 +1,238 @@+{+ "slug": "tps51397arjer",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, QFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "tps51397arjer",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "tps51397arjer.kicad_sym",+ "tps51397arjer.kicad_mod",+ "tps51397arjer.glb",+ "tps51397arjer.step",+ "tps51397arjer.lbr",+ "docs/hero.png",+ "docs/tps51397arjer-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "tps51397arjer-hero.glb",+ "tps51397arjer-hero.overlay.json"+ ],+ "component": {+ "mpn": "TPS51397ARJER",+ "manufacturer": "Texas Instruments",+ "package": "QFN-20-EP(3x3)",+ "pin_count": 21,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/tps51397a",+ "parts": {+ "symbol": "tps51397arjer.kicad_sym",+ "footprint": "tps51397arjer.kicad_mod",+ "model_3d": "tps51397arjer-hero.glb",+ "model_3d_plain": "tps51397arjer.glb",+ "model_3d_step": "tps51397arjer-etched.step",+ "model_3d_step_plain": "tps51397arjer.step",+ "lbr": "tps51397arjer.lbr"+ },+ "distributor_links": {+ "lcsc": 1518754,+ "digikey": "296-TPS51397ARJERTR-ND",+ "mouser": "595-TPS51397ARJER"+ },+ "distributor_check": {+ "checked_at": "2026-10-03T02:13:36Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-TPS51397ARJERTR-ND",+ "status": "found"+ },+ "mouser": {+ "pn": "595-TPS51397ARJER",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "BST",+ "type": "power_out",+ "description": "Supply input for the gate drive voltage of the high-side MOSFET; connect a bootstrap capacitor between BST and SW, 0.1 μF recommended (VBST abs max 31 V)."+ },+ {+ "number": "2",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND."+ },+ {+ "number": "3",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND."+ },+ {+ "number": "4",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND."+ },+ {+ "number": "5",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage supply pin for the control circuitry (4.5 V to 24 V recommended); connect input decoupling capacitors between VIN and PGND."+ },+ {+ "number": "6",+ "name": "SW",+ "type": "power_out",+ "description": "Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage."+ },+ {+ "number": "7",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground terminal for the controller circuit and the internal circuitry."+ },+ {+ "number": "8",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground terminal for the controller circuit and the internal circuitry."+ },+ {+ "number": "9",+ "name": "PGOOD",+ "type": "output",+ "description": "Open-drain power-good indicator, asserted low if output voltage is out of PG threshold, over voltage, or during thermal shutdown, EN shutdown, or soft start."+ },+ {+ "number": "10",+ "name": "NC",+ "type": "unconnected",+ "description": "Not connected internally; can be connected to the GND plane for better thermal performance."+ },+ {+ "number": "11",+ "name": "SS",+ "type": "output",+ "description": "Soft-start time selection pin; an external capacitor sets the soft-start time, and with no capacitor it is about 1.2 ms."+ },+ {+ "number": "12",+ "name": "EN",+ "type": "input",+ "description": "Enable input of the buck converter."+ },+ {+ "number": "13",+ "name": "AGND",+ "type": "power_in",+ "description": "Ground of internal analog circuitry; connect to the GND plane with a short trace."+ },+ {+ "number": "14",+ "name": "FB",+ "type": "input",+ "description": "Feedback sensing pin for the buck output voltage; connect to the resistor divider between output voltage and AGND (0.6 V reference)."+ },+ {+ "number": "15",+ "name": "MODE",+ "type": "input",+ "description": "Switching frequency and light load operation mode selection pin; connect to a resistor divider from VCC and AGND."+ },+ {+ "number": "16",+ "name": "NC",+ "type": "unconnected",+ "description": "Not connected internally; can be connected to the GND plane for better thermal performance."+ },+ {+ "number": "17",+ "name": "VCC",+ "type": "power_out",+ "description": "Powers the driver and control circuits; decouple with a minimum 1-μF ceramic capacitor as close to VCC as possible."+ },+ {+ "number": "18",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground terminal for the controller circuit and the internal circuitry."+ },+ {+ "number": "19",+ "name": "SW",+ "type": "power_out",+ "description": "Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage."+ },+ {+ "number": "20",+ "name": "SW",+ "type": "power_out",+ "description": "Switching node connection to the inductor and bootstrap capacitor; voltage swings from a diode voltage below ground up to the input voltage."+ },+ {+ "number": "21",+ "name": "PGND",+ "type": "power_in",+ "description": "Thermal pad, power ground terminal for the controller circuit and the internal circuitry."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 21 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 10,+ "cost_usd": 0.1808,+ "at": "2026-10-03T02:13:06"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/tps51397a",+ "pages": 28,+ "sha256": "ace9eacb12e2228b",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 21,+ "described": 21,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}