component
LM21212MH-2
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 @@+# LM21212MH-2++**Texas Instruments** · DC-DC Converters · HTSSOP-20-EP++LM21212MH-2 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 | FADJ | input | Frequency Adjust pin; switching frequency can be set between 300kHz and 1.55MHz by connecting a resistor between this pin and AGND. |+| 2 | SS/TRK | input | Soft-start control pin; an internal 2 µA current source charges an external capacitor connected between this pin and AGND to set the output voltage ramp rate during startup; can also be used to configure the tracking feature. |+| 3 | EN | input | Active high enable input for the device; if not used, the EN pin can be left open, which will go high due to an internal current source. |+| 4 | AVIN | power_in | Analog input voltage supply that generates the internal bias; it is recommended to connect PVIN to AVIN through a low pass RC filter to minimize the influence of input rail ripple and noise on the analog control circuitry. |+| 5 | PVIN | power_in | Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible. |+| 6 | PVIN | power_in | Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible. |+| 7 | PVIN | power_in | Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible. |+| 8 | PGND | power_in | Power ground pins for the internal power switches. |+| 9 | PGND | power_in | Power ground pins for the internal power switches. |+| 10 | PGND | power_in | Power ground pins for the internal power switches. |+| 11 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 12 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 13 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 14 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 15 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 16 | SW | output | Switch node pins; these pins should be tied together locally and connected to the filter inductor. |+| 17 | PGOOD | output | Open-drain power good indicator. |+| 18 | COMP | output | Compensation pin connected to the output of the voltage loop error amplifier. |+| 19 | FB | input | Feedback pin connected to the inverting input of the voltage loop error amplifier. |+| 20 | AGND | power_in | Quiet analog ground for the internal reference and bias circuitry. |+| 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: `LM21212MH-2`+- 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: `lm21212mh-2-etched.step` / `lm21212mh-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm21212mh-2.step` / `lm21212mh-2.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/lm21212-2) (39 pp, sha256 `ffdfc10f56f46bdb`, 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/lm21212mh-2-datasheet.pdf)
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switching frequency can be set between 300kHz and 1.55MHz by connecting a resistor between this pin and AGND."+ },+ {+ "number": "2",+ "name": "SS/TRK",+ "type": "input",+ "description": "Soft-start control pin; an internal 2 µA current source charges an external capacitor connected between this pin and AGND to set the output voltage ramp rate during startup; can also be used to configure the tracking feature."+ },+ {+ "number": "3",+ "name": "EN",+ "type": "input",+ "description": "Active high enable input for the device; if not used, the EN pin can be left open, which will go high due to an internal current source."+ },+ {+ "number": "4",+ "name": "AVIN",+ "type": "power_in",+ "description": "Analog input voltage supply that generates the internal bias; it is recommended to connect PVIN to AVIN through a low pass RC filter to minimize the influence of input rail ripple and noise on the analog control circuitry."+ },+ {+ "number": "5",+ "name": "PVIN",+ "type": "power_in",+ "description": "Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible."+ },+ {+ "number": "6",+ "name": "PVIN",+ "type": "power_in",+ "description": "Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible."+ },+ {+ "number": "7",+ "name": "PVIN",+ "type": "power_in",+ "description": "Input voltage to the power switches inside the device with input voltage range 2.95V to 5.5V; these pins should be connected together at the device with low ESR input capacitance located as close as possible."+ },+ {+ "number": "8",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground pins for the internal power switches."+ },+ {+ "number": "9",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground pins for the internal power switches."+ },+ {+ "number": "10",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground pins for the internal power switches."+ },+ {+ "number": "11",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "12",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "13",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "14",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "15",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "16",+ "name": "SW",+ "type": "output",+ "description": "Switch node pins; these pins should be tied together locally and connected to the filter inductor."+ },+ {+ "number": "17",+ "name": "PGOOD",+ "type": "output",+ "description": "Open-drain power good indicator."+ },+ {+ "number": "18",+ "name": "COMP",+ "type": "output",+ "description": "Compensation pin connected to the output of the voltage loop error amplifier."+ },+ {+ "number": "19",+ "name": "FB",+ "type": "input",+ "description": "Feedback pin connected to the inverting input of the voltage loop error amplifier."+ },+ {+ "number": "20",+ "name": "AGND",+ "type": "power_in",+ "description": "Quiet analog ground for the internal reference and bias circuitry."+ },+ {+ "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": [+ "exposed pad 21 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 8,+ "cost_usd": 0.0847,+ "at": "2026-10-07T09:00:38"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm21212-2",+ "pages": 39,+ "sha256": "ffdfc10f56f46bdb",+ "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"+ },+ "models_3d": [+ {+ "file": "lm21212mh-2.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.41,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "598a155dc88141c69502e349a3cc186d8acde2120cd2d440537391c793c730fb",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm21212mh-2-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.41,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "8230c36643fd633a64a32f6731adbf4fde4dea412cabd21f6ea12040101807cf",+ "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]"+ }+}