component
LM5576MH
Public Made by Adomby adom
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 @@+# LM5576MH++**Texas Instruments** · DC-DC Converters · HTSSOP-20-EP++LM5576MH 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 | VCC | power_out | Bias regulator output nominally regulated to 7.15V (range 6.85V to 7.45V) requiring 0.1µF to 1µF ceramic decoupling capacitor; external supply voltage 7.5V to 14V optional to reduce IC power dissipation. |+| 2 | SD | input | Shutdown/UVLO input enabling low-power mode for voltages >0.7V, standby mode 0.7V to 1.225V, and normal operation >1.225V, with internal 5µA pullup enabling full operation if pin left open. |+| 3 | VIN | power_in | Input power supply pin rated for 6V to 75V operation providing primary connection to internal voltage regulator and buck switch. |+| 4 | VIN | power_in | Input power supply pin rated for 6V to 75V operation providing secondary connection for power distribution. |+| 5 | SYNC | bidirectional | Oscillator synchronization input/output where external clock with open-drain output can pull low to synchronize internal oscillator, or multiple LM5576 devices synchronize by connecting SYNC pins together. |+| 6 | COMP | output | Error amplifier output for connection of type II compensation network (resistor-capacitor elements) between COMP and FB pins. |+| 7 | FB | input | Feedback input to error amplifier inverting input with 1.225V regulation threshold; output voltage set by external resistor divider as VOUT = 1.225V × (1 + R5/R6). |+| 8 | RT | input | Oscillator frequency programming input; external resistor connected between this pin and AGND sets internal oscillator frequency from 50kHz to 500kHz. |+| 9 | RAMP | output | Ramp control signal output; external capacitor to AGND (recommended 50pF to 2000pF) sets ramp slope for simulated current mode control. |+| 10 | AGND | power_in | Analog ground reference providing internal bias point for low-level signal circuits including oscillator, error amplifier, and synchronization functions. |+| 11 | SS | output | Soft start output pin with internal 10µA current source charging external capacitor to set error amplifier ramp time; held low during standby, VCC UVLO, and thermal shutdown. |+| 12 | OUT | power_out | Regulated output voltage connection directly to regulated output power with nominal voltage set by external resistor network as VOUT = 1.225V × (1 + R5/R6). |+| 13 | PGND | power_in | Power ground providing low-side return path for buck switch, gate driver circuits, and current sense resistor. |+| 14 | PGND | power_in | Power ground providing secondary connection for power return distribution and gate driver low-side reference. |+| 15 | IS | input | Current sense input connected to recirculation diode cathode; internal sense resistor detects diode current at end of off-time for simulated current ramp generation. |+| 16 | IS | input | Current sense input providing second connection for recirculation diode current measurement and direct current slope compensation feedback. |+| 17 | SW | output | Switch node output serving as source terminal of internal 75V, 170mΩ N-channel buck MOSFET connecting to external Schottky diode cathode and buck inductor. |+| 18 | SW | output | Switch node output providing second connection for internal N-channel buck switch source terminal; voltage switches between approximately -0.5V (off-time) and VIN (on-time). |+| 19 | PRE | input | Bootstrap capacitor pre-charge input with open-drain output connecting to SW pin to aid bootstrap capacitor charging at light load conditions; internal MOSFET conducts 265ns per cycle. |+| 20 | BST | input | Bootstrap input where external ceramic capacitor (0.022µF recommended) between BST and SW pins charges from VCC through internal diode during buck switch off-time for gate driver supply. |+| 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: `LM5576MH`+- 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: `lm5576mh-etched.step` / `lm5576mh-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5576mh.step` / `lm5576mh.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/lm5576) (38 pp, sha256 `6560aa111915f5a2`, 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 0.3`, 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/lm5576mh-datasheet.pdf)
page.jsonadded+235@@ -0,0 +1,235 @@+{+ "slug": "lm5576mh",+ "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)",+ "lm5576mh",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm5576mh.kicad_sym",+ "lm5576mh.kicad_mod",+ "lm5576mh.glb",+ "lm5576mh.step",+ "lm5576mh.lbr",+ "docs/hero.png",+ "docs/lm5576mh-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM5576MH",+ "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/lm5576",+ "parts": {+ "symbol": "lm5576mh.kicad_sym",+ "footprint": "lm5576mh.kicad_mod",+ "model_3d": "lm5576mh-etched.glb",+ "model_3d_plain": "lm5576mh.glb",+ "model_3d_step": "lm5576mh-etched.step",+ "model_3d_step_plain": "lm5576mh.step",+ "lbr": "lm5576mh.lbr"+ },+ "distributor_links": {+ "lcsc": "C182428",+ "digikey": "LM5576MH-ND",+ "mouser": "926-LM5576MH"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T18:42:55Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "LM5576MH-ND",+ "status": "found",+ "lifecycle": "Obsolete"+ },+ "mouser": {+ "pn": "926-LM5576MH",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "VCC",+ "type": "power_out",+ "description": "Bias regulator output nominally regulated to 7.15V (range 6.85V to 7.45V) requiring 0.1µF to 1µF ceramic decoupling capacitor; external supply voltage 7.5V to 14V optional to reduce IC power dissipation."+ },+ {+ "number": "2",+ "name": "SD",+ "type": "input",+ "description": "Shutdown/UVLO input enabling low-power mode for voltages >0.7V, standby mode 0.7V to 1.225V, and normal operation >1.225V, with internal 5µA pullup enabling full operation if pin left open."+ },+ {+ "number": "3",+ "name": "VIN",+ "type": "power_in",+ "description": "Input power supply pin rated for 6V to 75V operation providing primary connection to internal voltage regulator and buck switch."+ },+ {+ "number": "4",+ "name": "VIN",+ "type": "power_in",+ "description": "Input power supply pin rated for 6V to 75V operation providing secondary connection for power distribution."+ },+ {+ "number": "5",+ "name": "SYNC",+ "type": "bidirectional",+ "description": "Oscillator synchronization input/output where external clock with open-drain output can pull low to synchronize internal oscillator, or multiple LM5576 devices synchronize by connecting SYNC pins together."+ },+ {+ "number": "6",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output for connection of type II compensation network (resistor-capacitor elements) between COMP and FB pins."+ },+ {+ "number": "7",+ "name": "FB",+ "type": "input",+ "description": "Feedback input to error amplifier inverting input with 1.225V regulation threshold; output voltage set by external resistor divider as VOUT = 1.225V × (1 + R5/R6)."+ },+ {+ "number": "8",+ "name": "RT",+ "type": "input",+ "description": "Oscillator frequency programming input; external resistor connected between this pin and AGND sets internal oscillator frequency from 50kHz to 500kHz."+ },+ {+ "number": "9",+ "name": "RAMP",+ "type": "output",+ "description": "Ramp control signal output; external capacitor to AGND (recommended 50pF to 2000pF) sets ramp slope for simulated current mode control."+ },+ {+ "number": "10",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground reference providing internal bias point for low-level signal circuits including oscillator, error amplifier, and synchronization functions."+ },+ {+ "number": "11",+ "name": "SS",+ "type": "output",+ "description": "Soft start output pin with internal 10µA current source charging external capacitor to set error amplifier ramp time; held low during standby, VCC UVLO, and thermal shutdown."+ },+ {+ "number": "12",+ "name": "OUT",+ "type": "power_out",+ "description": "Regulated output voltage connection directly to regulated output power with nominal voltage set by external resistor network as VOUT = 1.225V × (1 + R5/R6)."+ },+ {+ "number": "13",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground providing low-side return path for buck switch, gate driver circuits, and current sense resistor."+ },+ {+ "number": "14",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground providing secondary connection for power return distribution and gate driver low-side reference."+ },+ {+ "number": "15",+ "name": "IS",+ "type": "input",+ "description": "Current sense input connected to recirculation diode cathode; internal sense resistor detects diode current at end of off-time for simulated current ramp generation."+ },+ {+ "number": "16",+ "name": "IS",+ "type": "input",+ "description": "Current sense input providing second connection for recirculation diode current measurement and direct current slope compensation feedback."+ },+ {+ "number": "17",+ "name": "SW",+ "type": "output",+ "description": "Switch node output serving as source terminal of internal 75V, 170mΩ N-channel buck MOSFET connecting to external Schottky diode cathode and buck inductor."+ },+ {+ "number": "18",+ "name": "SW",+ "type": "output",+ "description": "Switch node output providing second connection for internal N-channel buck switch source terminal; voltage switches between approximately -0.5V (off-time) and VIN (on-time)."+ },+ {+ "number": "19",+ "name": "PRE",+ "type": "input",+ "description": "Bootstrap capacitor pre-charge input with open-drain output connecting to SW pin to aid bootstrap capacitor charging at light load conditions; internal MOSFET conducts 265ns per cycle."+ },+ {+ "number": "20",+ "name": "BST",+ "type": "input",+ "description": "Bootstrap input where external ceramic capacitor (0.022µF recommended) between BST and SW pins charges from VCC through internal diode during buck switch off-time for gate driver supply."+ },+ {+ "number": "21",+ "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-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 27,+ "cost_usd": 0.282,+ "at": "2026-10-01T18:42:41"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm5576",+ "pages": 38,+ "sha256": "6560aa111915f5a2",+ "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]"+ }+}