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LM5122QMHX
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Texas Instruments DC-DC Converters, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+58@@ -0,0 +1,58 @@+# LM5122QMHX++**Texas Instruments** · DC-DC Converters · TSSOP-20-EP++LM5122QMHX from Texas Instruments, in a TSSOP-20-EP. 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 | SYNCOUT | output | Clock output providing 180° phase shift for multiphase operation that may be left floating when unused. |+| 2 | OPT | input | Clock synchronization selection pin controlling master/slave configuration, must not be left floating. |+| 3 | CSN | input | Inverting input of current sense amplifier connected to the negative side of the sense resistor. |+| 4 | CSP | input | Non-inverting input of current sense amplifier connected to the positive side of the sense resistor. |+| 5 | VIN | power_in | Supply voltage input to internal VCC regulator accepting input voltages from 4.5V to 65V. |+| 6 | UVLO | input | Undervoltage lockout programming pin with shutdown (below 0.4V), standby (0.4V to 1.2V), and startup (above 1.2V) threshold modes. |+| 7 | SS | input | Soft-start programming pin with internal 10-μA current source controlling output voltage ramp rate during startup. |+| 8 | SYNCIN/RT | input | Oscillator synchronization input and timing resistor pin for frequency programming and external clock synchronization up to 2 MHz. |+| 9 | AGND | power_in | Analog ground connection providing return path for internal voltage reference and analog circuits. |+| 10 | FB | input | Feedback inverting input with 1.2V regulation threshold; sets output voltage via external resistor divider and enables slave mode if above 2.7V at power-on. |+| 11 | COMP | output | Error amplifier output node for connection of Type 2 compensation network to feedback pin. |+| 12 | SLOPE | input | Slope compensation programming pin with amplitude set by external resistor to AGND for prevention of sub-harmonic oscillation. |+| 13 | MODE | input | Switching mode selection with internal pullup/pulldown resistors that enable forced PWM mode (above 1.2V) or diode-emulation mode (below 1.2V). |+| 14 | RES | output | Restart timer pin with external capacitor for hiccup-mode off-time and restart delay programming during overload conditions. |+| 15 | PGND | power_in | Power ground connection pin for low-side gate driver that must connect directly to the low-side MOSFET source terminal. |+| 16 | LO | output | Low-side N-channel MOSFET gate driver output with 3A peak source/sink current capability requiring short low-inductance connection to gate. |+| 17 | VCC | power_in | Bias supply output from internal 7.6V regulator powering controller and drivers, decouple to PGND with low-ESR ceramic capacitor. |+| 18 | SW | bidirectional | Boost converter switching node connecting bootstrap capacitor and both MOSFET switches via short low-inductance paths for noise minimization. |+| 19 | HO | output | High-side N-channel MOSFET gate driver output with 3.2A peak source/sink current at 7.6V requiring short low-inductance connection to gate. |+| 20 | BST | power_in | Bootstrap gate-drive supply pin charged by internal 200-μA pump that maintains high-side driver supply for 100% duty-cycle bypass operation. |+| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20-EP |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `LM5122QMHX`+- Footprint: `Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm`+- 3D model: TSSOP-20-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `lm5122qmhx-etched.step` / `lm5122qmhx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5122qmhx.step` / `lm5122qmhx.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/lm5122-q1) (50 pp, sha256 `89895d7bdb8309ba`, retrieved 2026-10-01, 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 0.2`, 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/lm5122qmhx-datasheet.pdf)
page.jsonadded+231@@ -0,0 +1,231 @@+{+ "slug": "lm5122qmhx",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm5122qmhx",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm5122qmhx.kicad_sym",+ "lm5122qmhx.kicad_mod",+ "lm5122qmhx.glb",+ "lm5122qmhx.step",+ "lm5122qmhx.lbr",+ "docs/hero.png",+ "docs/lm5122qmhx-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM5122QMHX",+ "manufacturer": "Texas Instruments",+ "package": "TSSOP-20-EP",+ "pin_count": 21,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm5122-q1",+ "parts": {+ "symbol": "lm5122qmhx.kicad_sym",+ "footprint": "lm5122qmhx.kicad_mod",+ "model_3d": "lm5122qmhx-etched.glb",+ "model_3d_plain": "lm5122qmhx.glb",+ "model_3d_step": "lm5122qmhx-etched.step",+ "model_3d_step_plain": "lm5122qmhx.step",+ "lbr": "lm5122qmhx.lbr"+ },+ "distributor_links": {+ "lcsc": "C527477"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T17:12:16Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": null,+ "status": "no match"+ },+ "mouser": {+ "pn": null,+ "status": "no match"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "SYNCOUT",+ "type": "output",+ "description": "Clock output providing 180° phase shift for multiphase operation that may be left floating when unused."+ },+ {+ "number": "2",+ "name": "OPT",+ "type": "input",+ "description": "Clock synchronization selection pin controlling master/slave configuration, must not be left floating."+ },+ {+ "number": "3",+ "name": "CSN",+ "type": "input",+ "description": "Inverting input of current sense amplifier connected to the negative side of the sense resistor."+ },+ {+ "number": "4",+ "name": "CSP",+ "type": "input",+ "description": "Non-inverting input of current sense amplifier connected to the positive side of the sense resistor."+ },+ {+ "number": "5",+ "name": "VIN",+ "type": "power_in",+ "description": "Supply voltage input to internal VCC regulator accepting input voltages from 4.5V to 65V."+ },+ {+ "number": "6",+ "name": "UVLO",+ "type": "input",+ "description": "Undervoltage lockout programming pin with shutdown (below 0.4V), standby (0.4V to 1.2V), and startup (above 1.2V) threshold modes."+ },+ {+ "number": "7",+ "name": "SS",+ "type": "input",+ "description": "Soft-start programming pin with internal 10-μA current source controlling output voltage ramp rate during startup."+ },+ {+ "number": "8",+ "name": "SYNCIN/RT",+ "type": "input",+ "description": "Oscillator synchronization input and timing resistor pin for frequency programming and external clock synchronization up to 2 MHz."+ },+ {+ "number": "9",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground connection providing return path for internal voltage reference and analog circuits."+ },+ {+ "number": "10",+ "name": "FB",+ "type": "input",+ "description": "Feedback inverting input with 1.2V regulation threshold; sets output voltage via external resistor divider and enables slave mode if above 2.7V at power-on."+ },+ {+ "number": "11",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output node for connection of Type 2 compensation network to feedback pin."+ },+ {+ "number": "12",+ "name": "SLOPE",+ "type": "input",+ "description": "Slope compensation programming pin with amplitude set by external resistor to AGND for prevention of sub-harmonic oscillation."+ },+ {+ "number": "13",+ "name": "MODE",+ "type": "input",+ "description": "Switching mode selection with internal pullup/pulldown resistors that enable forced PWM mode (above 1.2V) or diode-emulation mode (below 1.2V)."+ },+ {+ "number": "14",+ "name": "RES",+ "type": "output",+ "description": "Restart timer pin with external capacitor for hiccup-mode off-time and restart delay programming during overload conditions."+ },+ {+ "number": "15",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground connection pin for low-side gate driver that must connect directly to the low-side MOSFET source terminal."+ },+ {+ "number": "16",+ "name": "LO",+ "type": "output",+ "description": "Low-side N-channel MOSFET gate driver output with 3A peak source/sink current capability requiring short low-inductance connection to gate."+ },+ {+ "number": "17",+ "name": "VCC",+ "type": "power_in",+ "description": "Bias supply output from internal 7.6V regulator powering controller and drivers, decouple to PGND with low-ESR ceramic capacitor."+ },+ {+ "number": "18",+ "name": "SW",+ "type": "bidirectional",+ "description": "Boost converter switching node connecting bootstrap capacitor and both MOSFET switches via short low-inductance paths for noise minimization."+ },+ {+ "number": "19",+ "name": "HO",+ "type": "output",+ "description": "High-side N-channel MOSFET gate driver output with 3.2A peak source/sink current at 7.6V requiring short low-inductance connection to gate."+ },+ {+ "number": "20",+ "name": "BST",+ "type": "power_in",+ "description": "Bootstrap gate-drive supply pin charged by internal 200-μA pump that maintains high-side driver supply for 100% duty-cycle bypass operation."+ },+ {+ "number": "21",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "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": [],+ "pages_sent": 50,+ "cost_usd": 0.4014,+ "at": "2026-10-01T17:11:53"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm5122-q1",+ "pages": 50,+ "sha256": "89895d7bdb8309ba",+ "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]"+ }+}