component
UC3856DWTR
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownUC3856DWTR
Texas Instruments · DC-DC Converters · SOIC-16-300mil
UC3856DWTR 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 / soft start pin; current into it above 3mA (min latching) latches the circuit into shutdown, below 0.8mA max does not latch. |
| 2 | VREF | power_out | 5.1V reference regulator output (5.00 to 5.20V on UC3856 at 1mA), short circuit current -25 to -65mA. |
| 3 | CS- | input | Current sense amplifier inverting input; absolute maximum -0.3V to +3V, common mode range 0 to 3V. |
| 4 | CS+ | input | Current sense amplifier non-inverting input; absolute maximum -0.3V to +3V, common mode range 0 to 3V. |
| 5 | EA+ | input | Error amplifier non-inverting input; range -0.3V to VIN, common mode 0 to VIN-2V. |
| 6 | EA- | input | Error amplifier inverting input; range -0.3V to VIN, common mode 0 to VIN-2V. |
| 7 | COMP | output | Error amplifier output; can source up to 0.5mA (absolute maximum -5mA). |
| 8 | CT | passive | Oscillator timing capacitor connection; CT sets output deadtime (Td = 250CT for large RT) and frequency fT = 2/(RT·CT). |
| 9 | RT | passive | Oscillator timing resistor connection; with CT sets oscillator frequency fT = 2/(RT·CT). |
| 10 | SYNC | bidirectional | Oscillator sync, low impedance TTL compatible output that is tri-state when used as a sync input; output current ±10mA max. |
| 11 | AOUT | output | Totem pole output A, 1.5A peak, 0.5A DC and 2.0A pulse (0.5µs) absolute maximum source or sink. |
| 12 | GND | power_in | Ground; all voltages are measured with respect to this pin. |
| 13 | VC | power_in | Collector supply for the output totem poles; absolute maximum +40V. |
| 14 | BOUT | output | Totem pole output B, 1.5A peak, 0.5A DC and 2.0A pulse (0.5µs) absolute maximum source or sink. |
| 15 | VIN | power_in | Supply voltage input; absolute maximum +40V, UVLO startup threshold 8.0V max with 0.7V hysteresis. |
| 16 | SHUTDOWN | input | Shutdown input with 1V threshold (0.95 to 1.05V); input range 0 to 5V, absolute maximum -0.3V to +10V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UC3856DWTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
uc3856dwtr-etched.step/uc3856dwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3856dwtr.step/uc3856dwtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (22 pp, sha256
ce7201c374ef8623, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-opus-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).