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LM5122MH
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Texas Instruments DC-DC Converters, HTSSOP-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 @@+# LM5122MH++**Texas Instruments** · DC-DC Converters · HTSSOP-20-EP++LM5122MH from Texas Instruments, in a HTSSOP-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 pin providing 180° phase shift (3.3-4.3V high level) for interleaved multi-phase boost converter operation; can be left floating when not used. |+| 2 | OPT | input | Master/slave configuration and SYNCOUT enable control input; voltage >2.7V enables master2 mode and disables SYNCOUT; must not be left floating. |+| 3 | CSN | input | Inverting input to 10V/V current sense amplifier; connect to negative terminal of current sense resistor. |+| 4 | CSP | input | Non-inverting input to 10V/V current sense amplifier with 75-mV cycle-by-cycle current limit threshold; operating range 3-65V common-mode. |+| 5 | VIN | power_in | Input supply voltage source (3V at soft-start, 4.5-65V operating range) for internal VCC regulator and power stage with 9μA shutdown current. |+| 6 | UVLO | input | Programmable undervoltage lockout with three operational modes: <0.4V shutdown, 0.4-1.2V standby with VCC regulator active, >1.2V startup and normal operation; internal 10μA hysteresis current. |+| 7 | SS | input | Soft-start capacitor programming input with internal 10μA charging current source and pulldown discharge switch for gradual voltage ramp control. |+| 8 | SYNCIN/RT | input | Resistor-programmed oscillator frequency input (1.2V reference, 400-975kHz adjustable range) and external synchronization clock input accepting 100ns minimum pulse width. |+| 9 | AGND | power_in | Analog ground connection serving as return path for internal voltage reference, error amplifier, and analog sensing circuits. |+| 10 | FB | input | Feedback input to error amplifier with 1.2V regulation threshold; resistor divider programs output voltage; FB >2.7V at startup enables slave-mode. |+| 11 | COMP | output | Error amplifier output (0.25V low to 3.4V high depending on VCC supply) for Type 2 feedback compensation network connection to FB pin. |+| 12 | SLOPE | input | Slope compensation resistor programming input (1.2V reference, 1.4-1.9V signal amplitude) for sub-harmonic oscillation elimination at duty cycles above 50%. |+| 13 | MODE | input | Switching mode control with 1.2V threshold; >1.2V enables forced-PWM with reverse conduction allowed, <1.2V enables diode-emulation mode with optional skip-cycle. |+| 14 | RES | output | Restart timer capacitor programming pin with 1.2V restart threshold and 30μA fault-state charging current for hiccup-mode overload protection; connect to AGND if not used. |+| 15 | PGND | power_in | Power ground connection for low-side MOSFET gate driver; must be directly connected to low-side MOSFET source terminal for proper adaptive dead-time operation. |+| 16 | LO | output | Low-side N-channel MOSFET gate driver output with 0.1-0.25V on-state voltage drop, 3.2A peak sink current, and 50-145ns adaptive dead-time delay. |+| 17 | VCC | power_in | Regulated 7.6V bias supply output with 50-62mA current sourcing limit, 0.25-0.5V dropout from VIN, and 3.9-4.1V rising undervoltage threshold for driver operation. |+| 18 | SW | bidirectional | Boost converter switching node (-5V to +105V voltage rating) where bootstrap capacitor, high-side MOSFET source, and low-side MOSFET drain connect through low inductance paths. |+| 19 | HO | output | High-side N-channel MOSFET gate driver output with 0.15-0.24V source voltage drop, 3.2A peak source current, and operation from 3.8-14V bootstrap supply. |+| 20 | BST | power_in | Bootstrap supply node (3.8-14V operating range, 5.3-9V SW-referenced regulation) for high-side gate driver, charged via external diode with internal 200μA charge pump for bypass mode. |+| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | HTSSOP-20-EP |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `LM5122MH`+- Footprint: `Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm`+- 3D model: HTSSOP-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: `lm5122mh-etched.step` / `lm5122mh-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5122mh.step` / `lm5122mh.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) (57 pp, sha256 `7bd611bdc5bece00`, 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-4-6` (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/lm5122mh-datasheet.pdf)
page.jsonadded+231@@ -0,0 +1,231 @@+{+ "slug": "lm5122mh",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm5122mh",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm5122mh.kicad_sym",+ "lm5122mh.kicad_mod",+ "lm5122mh.glb",+ "lm5122mh.step",+ "lm5122mh.lbr",+ "docs/hero.png",+ "docs/lm5122mh-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM5122MH",+ "manufacturer": "Texas Instruments",+ "package": "HTSSOP-20-EP",+ "pin_count": 21,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm5122",+ "parts": {+ "symbol": "lm5122mh.kicad_sym",+ "footprint": "lm5122mh.kicad_mod",+ "model_3d": "lm5122mh-etched.glb",+ "model_3d_plain": "lm5122mh.glb",+ "model_3d_step": "lm5122mh-etched.step",+ "model_3d_step_plain": "lm5122mh.step",+ "lbr": "lm5122mh.lbr"+ },+ "distributor_links": {+ "lcsc": "C2859988"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T18:01:13Z",+ "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 pin providing 180° phase shift (3.3-4.3V high level) for interleaved multi-phase boost converter operation; can be left floating when not used."+ },+ {+ "number": "2",+ "name": "OPT",+ "type": "input",+ "description": "Master/slave configuration and SYNCOUT enable control input; voltage >2.7V enables master2 mode and disables SYNCOUT; must not be left floating."+ },+ {+ "number": "3",+ "name": "CSN",+ "type": "input",+ "description": "Inverting input to 10V/V current sense amplifier; connect to negative terminal of current sense resistor."+ },+ {+ "number": "4",+ "name": "CSP",+ "type": "input",+ "description": "Non-inverting input to 10V/V current sense amplifier with 75-mV cycle-by-cycle current limit threshold; operating range 3-65V common-mode."+ },+ {+ "number": "5",+ "name": "VIN",+ "type": "power_in",+ "description": "Input supply voltage source (3V at soft-start, 4.5-65V operating range) for internal VCC regulator and power stage with 9μA shutdown current."+ },+ {+ "number": "6",+ "name": "UVLO",+ "type": "input",+ "description": "Programmable undervoltage lockout with three operational modes: <0.4V shutdown, 0.4-1.2V standby with VCC regulator active, >1.2V startup and normal operation; internal 10μA hysteresis current."+ },+ {+ "number": "7",+ "name": "SS",+ "type": "input",+ "description": "Soft-start capacitor programming input with internal 10μA charging current source and pulldown discharge switch for gradual voltage ramp control."+ },+ {+ "number": "8",+ "name": "SYNCIN/RT",+ "type": "input",+ "description": "Resistor-programmed oscillator frequency input (1.2V reference, 400-975kHz adjustable range) and external synchronization clock input accepting 100ns minimum pulse width."+ },+ {+ "number": "9",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground connection serving as return path for internal voltage reference, error amplifier, and analog sensing circuits."+ },+ {+ "number": "10",+ "name": "FB",+ "type": "input",+ "description": "Feedback input to error amplifier with 1.2V regulation threshold; resistor divider programs output voltage; FB >2.7V at startup enables slave-mode."+ },+ {+ "number": "11",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output (0.25V low to 3.4V high depending on VCC supply) for Type 2 feedback compensation network connection to FB pin."+ },+ {+ "number": "12",+ "name": "SLOPE",+ "type": "input",+ "description": "Slope compensation resistor programming input (1.2V reference, 1.4-1.9V signal amplitude) for sub-harmonic oscillation elimination at duty cycles above 50%."+ },+ {+ "number": "13",+ "name": "MODE",+ "type": "input",+ "description": "Switching mode control with 1.2V threshold; >1.2V enables forced-PWM with reverse conduction allowed, <1.2V enables diode-emulation mode with optional skip-cycle."+ },+ {+ "number": "14",+ "name": "RES",+ "type": "output",+ "description": "Restart timer capacitor programming pin with 1.2V restart threshold and 30μA fault-state charging current for hiccup-mode overload protection; connect to AGND if not used."+ },+ {+ "number": "15",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground connection for low-side MOSFET gate driver; must be directly connected to low-side MOSFET source terminal for proper adaptive dead-time operation."+ },+ {+ "number": "16",+ "name": "LO",+ "type": "output",+ "description": "Low-side N-channel MOSFET gate driver output with 0.1-0.25V on-state voltage drop, 3.2A peak sink current, and 50-145ns adaptive dead-time delay."+ },+ {+ "number": "17",+ "name": "VCC",+ "type": "power_in",+ "description": "Regulated 7.6V bias supply output with 50-62mA current sourcing limit, 0.25-0.5V dropout from VIN, and 3.9-4.1V rising undervoltage threshold for driver operation."+ },+ {+ "number": "18",+ "name": "SW",+ "type": "bidirectional",+ "description": "Boost converter switching node (-5V to +105V voltage rating) where bootstrap capacitor, high-side MOSFET source, and low-side MOSFET drain connect through low inductance paths."+ },+ {+ "number": "19",+ "name": "HO",+ "type": "output",+ "description": "High-side N-channel MOSFET gate driver output with 0.15-0.24V source voltage drop, 3.2A peak source current, and operation from 3.8-14V bootstrap supply."+ },+ {+ "number": "20",+ "name": "BST",+ "type": "power_in",+ "description": "Bootstrap supply node (3.8-14V operating range, 5.3-9V SW-referenced regulation) for high-side gate driver, charged via external diode with internal 200μA charge pump for bypass mode."+ },+ {+ "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-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 57,+ "cost_usd": 0.6152,+ "at": "2026-10-01T18:00:50"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm5122",+ "pages": 57,+ "sha256": "7bd611bdc5bece00",+ "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]"+ }+}