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Generated by kicad-footprint-generator · KiCad file format 20260206

Name	Last commit message	Last updated
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uc3856dwtr-etched.step	uc3856dwtr: factory component page (tier=lcsc) · Ray	1mo ago
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UC3856DWTR

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc3856dwtr.step / uc3856dwtr.glb are 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, primary claude-sonnet-5-5 (vision), consensus claude-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).

Datasheet PDF