component
LM27402MHX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+54@@ -0,0 +1,54 @@+# LM27402MHX++**Texas Instruments** · DC-DC Converters · HTSSOP-16-EP++LM27402MHX from Texas Instruments, in a HTSSOP-16-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 | CS+ | input | Current sense positive input and noninverting input to the current-sense comparator. |+| 2 | CS- | input | Current sense negative input and inverting input to the current-sense comparator with 10-µA nominal offset current. |+| 3 | SS/TRACK | bidirectional | Soft-start or tracking input with +3-µA charging current for external capacitor; can be controlled by external voltage source; voltage must not exceed VDD. |+| 4 | FB | input | Feedback input and inverting input to the error amplifier for output voltage setting and control loop compensation. |+| 5 | COMP | output | Output of the internal error amplifier compared to internal ramp at PWM comparator to establish duty cycle command. |+| 6 | FADJ | input | Frequency adjust input; switching frequency programmable between 200 kHz and 1.2 MHz via external resistor to GND. |+| 7 | SYNC | input | Frequency synchronization input for external clock; frequency must exceed FADJ setting; must not exceed VDD and tie to GND if unused. |+| 8 | EN | input | Enable input; apply voltage above 1.17 V typically to enable switching when VIN and VDD exceed UVLO thresholds; 100 mV hysteresis; 2-µA pullup to VDD; must not exceed VDD. |+| 9 | PGOOD | tri_state | Open-drain power good monitor output goes low during overcurrent, short-circuit, UVLO, output overvoltage/undervoltage, overtemperature, or unregulated output; includes 20-μs deglitch filter; voltage should not exceed 5.5 V. |+| 10 | VIN | power_in | Input voltage supply rail with operating range 3 V to 20 V; provides feedforward modulation and internal bias supply generation; requires 1-μF ceramic capacitor to GND. |+| 11 | GND | power_in | Common ground connection providing power and signal return for analog functions, low-side MOSFET gate, soft-start capacitor, and frequency adjust resistor. |+| 12 | VDD | power_out | Internal sub-regulated 4.5-V bias supply for high-side MOSFET switching via CBOOT; 1-µF ceramic capacitor required to GND; cannot connect to separate rail; can connect to VIN only if VIN ≤ 5.5 V. |+| 13 | LG | output | Low-side MOSFET gate drive output. |+| 14 | SW | power_out | Power stage switch-node connection and return path for the high-side gate driver; switching node between high-side MOSFET and inductor. |+| 15 | HG | output | High-side MOSFET gate drive output. |+| 16 | CBOOT | power_out | High-side gate driver supply rail; requires 100-nF ceramic capacitor to SW and Schottky diode from VDD; provides gate drive voltage for high-side MOSFET. |+| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | HTSSOP-16-EP |+| Category | Power Management (PMIC) |+| Pins | 17 |++## CAD (KiCad official)++- Symbol: `LM27402MHX`+- Footprint: `Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm`+- 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)+- 3D model files: `lm27402mhx-etched.step` / `lm27402mhx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm27402mhx.step` / `lm27402mhx.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/lm27402) (54 pp, sha256 `603650c2a0683cad`, retrieved 2026-10-07, 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/lm27402mhx-datasheet.pdf)
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can be controlled by external voltage source; voltage must not exceed VDD."+ },+ {+ "number": "4",+ "name": "FB",+ "type": "input",+ "description": "Feedback input and inverting input to the error amplifier for output voltage setting and control loop compensation."+ },+ {+ "number": "5",+ "name": "COMP",+ "type": "output",+ "description": "Output of the internal error amplifier compared to internal ramp at PWM comparator to establish duty cycle command."+ },+ {+ "number": "6",+ "name": "FADJ",+ "type": "input",+ "description": "Frequency adjust input; switching frequency programmable between 200 kHz and 1.2 MHz via external resistor to GND."+ },+ {+ "number": "7",+ "name": "SYNC",+ "type": "input",+ "description": "Frequency synchronization input for external clock; frequency must exceed FADJ setting; must not exceed VDD and tie to GND if unused."+ },+ {+ "number": "8",+ "name": "EN",+ "type": "input",+ "description": "Enable input; apply voltage above 1.17 V typically to enable switching when VIN and VDD exceed UVLO thresholds; 100 mV hysteresis; 2-µA pullup to VDD; must not exceed VDD."+ },+ {+ "number": "9",+ "name": "PGOOD",+ "type": "tri_state",+ "description": "Open-drain power good monitor output goes low during overcurrent, short-circuit, UVLO, output overvoltage/undervoltage, overtemperature, or unregulated output; includes 20-μs deglitch filter; voltage should not exceed 5.5 V."+ },+ {+ "number": "10",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage supply rail with operating range 3 V to 20 V; provides feedforward modulation and internal bias supply generation; requires 1-μF ceramic capacitor to GND."+ },+ {+ "number": "11",+ "name": "GND",+ "type": "power_in",+ "description": "Common ground connection providing power and signal return for analog functions, low-side MOSFET gate, soft-start capacitor, and frequency adjust resistor."+ },+ {+ "number": "12",+ "name": "VDD",+ "type": "power_out",+ "description": "Internal sub-regulated 4.5-V bias supply for high-side MOSFET switching via CBOOT; 1-µF ceramic capacitor required to GND; cannot connect to separate rail; can connect to VIN only if VIN ≤ 5.5 V."+ },+ {+ "number": "13",+ "name": "LG",+ "type": "output",+ "description": "Low-side MOSFET gate drive output."+ },+ {+ "number": "14",+ "name": "SW",+ "type": "power_out",+ "description": "Power stage switch-node connection and return path for the high-side gate driver; switching node between high-side MOSFET and inductor."+ },+ {+ "number": "15",+ "name": "HG",+ "type": "output",+ "description": "High-side MOSFET gate drive output."+ },+ {+ "number": "16",+ "name": "CBOOT",+ "type": "power_out",+ "description": "High-side gate driver supply rail; requires 100-nF ceramic capacitor to SW and Schottky diode from VDD; provides gate drive voltage for high-side MOSFET."+ },+ {+ "number": "17",+ "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": [+ "extractor flagged: Exposed pad (EP) for thermal management is part of HTSSOP-16-EP package but is not assigned a number",+ "exposed pad 17 added from the footprint"+ ],+ "pages_sent": 8,+ "cost_usd": 0.1107,+ "at": "2026-10-07T02:02:40"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm27402",+ "pages": 54,+ "sha256": "603650c2a0683cad",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 17,+ "described": 17,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lm27402mhx.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "7982746831c0bd23f4690608869ad67776faae5c762fb0376666126a3998921b",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm27402mhx-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "bab2f435a35f5e0c73f61623924533014ce91af0d4775a900df70321a69979d8",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}