TEA1791AT from NXP Semicon, in a SO-8. 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	SRSENSE	input	Synchronous timing input that activates the SR driver at −310 mV typical, regulates at −55 mV and deactivates at −12 mV, with a continuous voltage limit of 120 V.
2	GND	power_in	Ground reference pin; all voltages in the datasheet are measured with respect to this pin.
3	n.c.	unconnected	Not connected.
4	DRIVER	output	Driver output for the external SR MOSFET, with a typical output voltage limit of 10 V (12 V maximum) and a duty-cycle-limited current rating of −0.8 A to +3 A (duty cycle below 10 %).
5	n.c.	unconnected	Not connected.
6	n.c.	unconnected	Not connected.
7	n.c.	unconnected	Not connected.
8	VCC	power_in	Supply voltage pin; the IC leaves undervoltage lockout above 8.5 V typical and re-enters it below 8.0 V typical, with a continuous supply limit of −0.4 V to +38 V.

Key specifications

Parameter	Value
Manufacturer	NXP Semicon
Package	SO-8
Category	Power Management ICs
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
start-up voltage	Vstartup	8.2	8.5	8.8	V		6
driver activation voltage	Vact(drv)	-340	-310	-280	mV		6
driver regulation voltage	Vreg(drv)	-65	-55	-45	mV		6
minimum synchronous rectification active time	tact(sr)(min)	0.7	0.93	1.16	μs	Short time	6
minimum synchronous rectification active time	tact(sr)(min)	0.75	0.99	1.23	μs	Long time	6
source current	Isource	-0.3	-0.25	-0.2	A	VCC = 15 V; voltage on pin DRIVER = 2 V	6
sink current	Isink	1	1.4		A	VCC = 15 V; voltage on pin DRIVER = 2 V	6
sink current	Isink	2.2	2.7		A	voltage on pin DRIVER = 9.5 V	6
maximum output voltage	Vo(max)		10	12	V	VCC = 15 V	6
supply voltage	VCC	-0.4		38	V	continuous	5
voltage on pin SRSENSE	VSRSENSE			120	V	continuous	5
current on pin DRIVER	IDRIVER	-0.8		3	A	duty cycle < 10 %	5
current on pin SRSENSE	ISRSENSE	-3			mA		5
total power dissipation	Ptot			0.45	W	Tamb < 80 °C	5
storage temperature	Tstg	-55		150	°C		5
junction temperature	Tj	-40		150	°C		5
electrostatic discharge voltage	VESD			2000	V	human body model	5
electrostatic discharge voltage	VESD			200	V	machine model	5
electrostatic discharge voltage	VESD			500	V	charged device model	5
thermal resistance from junction to ambient	Rth(j-a)		150		K/W	in free air	5
thermal resistance from junction to case	Rth(j-c)		95		K/W		5

CAD (KiCad official)

Symbol: TEA1791AT
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)
3D model files: tea1791at-etched.step / tea1791at-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tea1791at.step / tea1791at.glb are the bare package body.

Provenance

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

Datasheet: NXP Semicon datasheet (13 pp, sha256 a8b88e411de2c7cd, retrieved 2026-10-30, tier: manufacturer)
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

TEA1791AT

Verified TEA1791AT

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README