COS29302 from COSINE, in a TO-263-5L. 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	EN	input	Enable input: logic-high turns the regulator on and logic-low shuts it down; CMOS/TTL compatible, with VIL max 0.8 V and VIH min 2.4 V.
2	IN	power_in	Supplies current to the output power device; input range is 4 V to 36 V per features, with absolute maximum +40 V and recommended supply +4.5 V to +26 V.
3	GND	power_in	Ground reference; the thermal tab must be connected to this same potential or left floating, and must not be tied to any other potential.
4	OUT	power_out	Regulator output voltage; a minimum 10 µF output capacitor is required at full load for stability.
5	ADJ	input	Adjustable feedback input connecting to the resistor divider from OUT to GND to set output voltage; bias current max 100 pA, and the resistor from VOUT to ADJ should not exceed 10 kΩ.
6	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	COSINE
Package	TO-263-5L
Category	Power Supply Chip
Pins	6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Output Voltage (IOUT=10mA)	VOUT	-1		1	%	IOUT =10mA	4
Output Voltage (10mA to IFL, VOUT+1V <= VIN <= 26V)	VOUT	-2		2	%	10mA ≤ IOUT ≤ IFL, ( VOUT + 1V) ≤ VIN≤26V	4
Line Regulation			0.3	1	%	IOUT=10mA, ( VOUT + 1V) ≤ VIN≤26V	4
Load Regulation			0.2	3	%	10mA≦IOUT≦1.5A	4
Output Voltage Temperature Coefficient	ΔVo/ΔT		20	100	ppm/°C		4
Dropout Voltage (IOUT=100mA)			80	175	mV	ΔVOUT = -1%, IOUT=100mA	4
Dropout Voltage (IOUT=3A)			370	600	mV	ΔVOUT = -1%, IOUT=3A	4
Current Limit	ILIM		4	4.8	A	VOUT=0V	4
Ground Current in Shutdown			5	75	nA		4
Reference Voltage		1.22	1.24	1.252	V		4
Adjust Pin Bias Current				100	pA		4
Input Logic Voltage Low (OFF)				0.8	V		4
Input Logic Voltage High (ON)		2.4			V		4
Enable Pin Input Current (VEN=0.8V)				24	pA	VEN=0.8V	4
Enable Pin Input Current (VEN=26V)				3	nA	VEN=26V	4
Regulator Output Current in Shutdown				18	µA	-40°C≤TJ≤ +125°C	4
Maximum Input Voltage	VIN			40	V		3
Enable Input Voltage		-0.3			V	Upper limit printed as VIN (see review_required)	3
Storage Temperature Range		-55		150	°C		3
Operating Junction Temperature	TJ	-40		125	°C		3
ESD Susceptibility, HBM				2000	V	HBM	3
Input Supply Voltage	VIN	4.5		26	V		3
Operating Ambient Temperature		-40		85	°C		3
Package Thermal Resistance, Junction-to-case (TO-263)	RθJC		3		°C/W	TO-263 package, junction-to-case	3

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts	copper		Internally connected directly to the device pin3 (GND). The thermal tab must be connected to a copper area on the PCB at the same	2

CAD (KiCad official)

Symbol: COS29302
Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
3D model: TO-263-5L (KiCad packages3D, STEP)
3D model files: cos29302-etched.step / cos29302-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cos29302.step / cos29302.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: COSINE datasheet (7 pp, sha256 ca28f741d9dc4058, retrieved 2026-11-05, 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

COS29302

Verified COS29302

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README