component
UC2856QDWRQ1
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# UC2856QDWRQ1++**Texas Instruments** · DC-DC Converters · SOIC-16-300mil++UC2856QDWRQ1 from Texas Instruments, in a SOIC-16-300mil. 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 | CL SS | input | Current-limit adjust and soft-start terminal; the current drawn into this pin determines whether the shutdown circuit latches or auto-restarts (Figure 7 and footnotes 5 and 6 of the electrical table). |+| 2 | VREF | power_out | 5.1-V reference output (5.05 V to 5.15 V at IO = 1 mA, TJ = 25°C); short-circuit current is -25 mA to -65 mA with VREF = 0 V. |+| 3 | CS− | input | Inverting input of the current-sense amplifier; input common-mode range is 0 V to 3 V. |+| 4 | CS+ | input | Non-inverting input of the current-sense amplifier; input common-mode range is 0 V to 3 V. |+| 5 | EA+ | input | Non-inverting input of the error amplifier; common-mode range is 0 V to VIN - 2 V. |+| 6 | EA− | input | Inverting input of the error amplifier; common-mode range is 0 V to VIN - 2 V. |+| 7 | COMP | output | Error amplifier output and compensation node; the error amplifier can source up to 0.5 mA. |+| 8 | CT | passive | Oscillator timing capacitor connection; the output deadtime is determined by the size of CT. |+| 9 | RT | passive | Oscillator timing resistor connection; oscillator frequency is set by RT and CT (characterized with RT = 10 kΩ and CT = 1 nF). |+| 10 | SYNC | bidirectional | TTL-compatible oscillator sync pin: as an output it provides VOH of 2.4 V minimum at -1 mA and VOL of 0.4 V maximum at 1 mA, and it is 3-stated when used as a sync input. |+| 11 | AOUT | output | Totem-pole output driver A; absolute maximum output current is 0.5 A DC or 2 A pulse (0.5 ms). |+| 12 | GND | power_in | Ground reference for all device voltages; all voltages are specified with respect to GND. |+| 13 | VC | power_in | Collector supply for the output stages; absolute maximum collector supply voltage is 40 V. |+| 14 | BOUT | output | Totem-pole output driver B; absolute maximum output current is 0.5 A DC or 2 A pulse (0.5 ms). |+| 15 | VIN | power_in | Supply voltage input; absolute maximum is 40 V, and the undervoltage lockout startup threshold is 8 V typical. |+| 16 | SHUTDOWN | input | Shutdown input with a 1.0 V threshold (0.95 V to 1.05 V) and an input voltage range of 0 V to 5 V; absolute maximum is -0.3 V to 10 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16-300mil |+| Category | Power Management (PMIC) |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `UC2856QDWRQ1`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)+- 3D model files: `uc2856qdwrq1-etched.step` / `uc2856qdwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc2856qdwrq1.step` / `uc2856qdwrq1.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/uc2856-q1) (19 pp, sha256 `51576f2bd2b22621`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/uc2856qdwrq1-datasheet.pdf)
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the current drawn into this pin determines whether the shutdown circuit latches or auto-restarts (Figure 7 and footnotes 5 and 6 of the electrical table)."+ },+ {+ "number": "2",+ "name": "VREF",+ "type": "power_out",+ "description": "5.1-V reference output (5.05 V to 5.15 V at IO = 1 mA, TJ = 25°C); short-circuit current is -25 mA to -65 mA with VREF = 0 V."+ },+ {+ "number": "3",+ "name": "CS−",+ "type": "input",+ "description": "Inverting input of the current-sense amplifier; input common-mode range is 0 V to 3 V."+ },+ {+ "number": "4",+ "name": "CS+",+ "type": "input",+ "description": "Non-inverting input of the current-sense amplifier; input common-mode range is 0 V to 3 V."+ },+ {+ "number": "5",+ "name": "EA+",+ "type": "input",+ "description": "Non-inverting input of the error amplifier; common-mode range is 0 V to VIN - 2 V."+ },+ {+ "number": "6",+ "name": "EA−",+ "type": "input",+ "description": "Inverting input of the error amplifier; common-mode range is 0 V to VIN - 2 V."+ },+ {+ "number": "7",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output and compensation node; the error amplifier can source up to 0.5 mA."+ },+ {+ "number": "8",+ "name": "CT",+ "type": "passive",+ "description": "Oscillator timing capacitor connection; the output deadtime is determined by the size of CT."+ },+ {+ "number": "9",+ "name": "RT",+ "type": "passive",+ "description": "Oscillator timing resistor connection; oscillator frequency is set by RT and CT (characterized with RT = 10 kΩ and CT = 1 nF)."+ },+ {+ "number": "10",+ "name": "SYNC",+ "type": "bidirectional",+ "description": "TTL-compatible oscillator sync pin: as an output it provides VOH of 2.4 V minimum at -1 mA and VOL of 0.4 V maximum at 1 mA, and it is 3-stated when used as a sync input."+ },+ {+ "number": "11",+ "name": "AOUT",+ "type": "output",+ "description": "Totem-pole output driver A; absolute maximum output current is 0.5 A DC or 2 A pulse (0.5 ms)."+ },+ {+ "number": "12",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference for all device voltages; all voltages are specified with respect to GND."+ },+ {+ "number": "13",+ "name": "VC",+ "type": "power_in",+ "description": "Collector supply for the output stages; absolute maximum collector supply voltage is 40 V."+ },+ {+ "number": "14",+ "name": "BOUT",+ "type": "output",+ "description": "Totem-pole output driver B; absolute maximum output current is 0.5 A DC or 2 A pulse (0.5 ms)."+ },+ {+ "number": "15",+ "name": "VIN",+ "type": "power_in",+ "description": "Supply voltage input; absolute maximum is 40 V, and the undervoltage lockout startup threshold is 8 V typical."+ },+ {+ "number": "16",+ "name": "SHUTDOWN",+ "type": "input",+ "description": "Shutdown input with a 1.0 V threshold (0.95 V to 1.05 V) and an input voltage range of 0 V to 5 V; absolute maximum is -0.3 V to 10 V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Pin numbers were derived by matching the top-view pin label order (page 1) with the block-diagram pi; The datasheet's Shutdown table row for minimum/maximum latching current into CL SS has unclear min/t; The datasheet gives the DW package as a 16-pin SOIC with a 7.5 mm wide body (7.5 x 10.3 mm outline);"+ ],+ "pages_sent": 19,+ "cost_usd": 0.0743,+ "at": "2026-10-08T15:49:57"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc2856-q1",+ "pages": 19,+ "sha256": "51576f2bd2b22621",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "uc2856qdwrq1.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "uc2856qdwrq1-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "9ddbcbea550bc2f44551c885750e9a7eb42598388d07f18e14e74a7a181b681c",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}