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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206

Name	Last commit message	Last updated
docs	az431az-atre1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	1mo ago
viewers	pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (pad-position, synthesised, bottom-right) · Ray	2mo ago
az431az-atre1-etched.fit.json	az431az-atre1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	1mo ago
az431az-atre1-etched.glb	az431az-atre1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	1mo ago
az431az-atre1-etched.step	az431az-atre1: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	1mo ago
az431az-atre1.glb	Publish 0.1.0 · Ray	2mo ago
az431az-atre1.kicad_mod	Publish 0.1.0 · Ray	2mo ago
az431az-atre1.kicad_sym	Publish 0.1.0 · Ray	2mo ago
az431az-atre1.lbr	rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray	2mo ago
az431az-atre1.step	Publish 0.1.0 · Ray	2mo ago
package.json	Publish 0.2.0 · Ray	2mo ago
pads.json	pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (pad-position, synthesised, bottom-right) · Ray	2mo ago
page.json	az431az-atre1: specified limits as data (metadata.characteristics, 24 rows from the datasheet) · Ray	20d ago
README.md	az431az-atre1: specified limits as data (metadata.characteristics, 24 rows from the datasheet) · Ray	20d ago

AZ431AZ-ATRE1

Diodes Incorporated · Voltage Reference · TO-92-2.54mm

AZ431AZ-ATRE1 from Diodes Incorporated, in a TO-92-2.54mm. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	REF	input	Reference input to the internal error amplifier. Regulation forces this pin to the internal 2.5 V VREF (0.4% tol) versus ANODE, typically driven from an external resistor divider between CATHODE and ANODE to program the output. Max continuous input current 10 mA; typical IREF ~0.7 uA.
2	CATHODE	passive	Shunt cathode (K). Sinks the regulation current to hold VKA at the programmed voltage set by the REF divider. Absolute max VKA = 40 V, recommended 2.5 V to 36 V; cathode current range -100 mA to +150 mA (recommended 1 mA to 100 mA for regulation). Dynamic impedance ~0.15 Ω typical.
3	ANODE	passive	Shunt anode (A), the common reference return for both the cathode current and the REF input divider. Typically tied to circuit ground in a shunt-regulator configuration.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	TO-92-2.54mm
Category	PMIC
Pins	3

Ordering variants

AZ431AZ-ATRE1
AZ431AZ-ATRE1AZ431AR
AZ431AZ-ATRE1AZ431AN

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Cathode Voltage	VKA			40	V		4
Cathode Current Range (Continuous)	IKA	-100		150	mA		4
Reference Input Current Range	IREF			10	mA		4
Power Dissipation	PD			770	mW	Z, R Package	4
Junction Temperature	TJ			150	°C		4
Storage Temperature Range	TSTG	-65		150	°C		4
ESD (Human Body Model)	ESD			2000	V	Human Body Model	4
Cathode Voltage (recommended)	VKA			36	V	Min = VREF	4
Cathode Current (recommended)	IKA	1		100	mA		4
Operating Ambient Temperature Range	TA	-40		125	°C		4
Reference Voltage	VREF	2.49	2.5	2.51	V	0.4% variant; VKA = VREF, IKA = 10mA	5
Deviation of Reference Voltage Over Full Temperature Range	VREF		4.5	8	mV	VKA = VREF, IKA = 10mA, 0 to +70°C	5
Deviation of Reference Voltage Over Full Temperature Range	VREF		4.5	10	mV	VKA = VREF, IKA = 10mA, -40 to +85°C	5
Deviation of Reference Voltage Over Full Temperature Range	VREF		4.5	16	mV	VKA = VREF, IKA = 10mA, -40 to +125°C	5
Ratio of Change in Reference Voltage to Change in Cathode Voltage	VREF/VKA		-1	-2.7	mV/V	IKA = 10mA, VKA = 10V to VREF	5
Ratio of Change in Reference Voltage to Change in Cathode Voltage	VREF/VKA		-0.5	-2	mV/V	IKA = 10mA, VKA = 36V to 10V	5
Reference Current	IREF		0.7	4	µA	IKA = 10mA, R1 = 10kΩ, R2 = ∞	5
Deviation of Reference Current Over Full Temperature Range	IREF		0.4	1.2	µA	IKA = 10mA, R1 = 10kΩ, R2 = ∞, TA = -40 to +125°C	5
Minimum Cathode Current for Regulation	IKA(Min)		0.4	1	mA	VKA = VREF	5
Off-state Cathode Current	IKA(Off)		0.05	1	µA	VKA = 36V, VREF = 0	5
Dynamic Impedance	ZKA		0.15	0.5	Ω	VKA = VREF, IKA = 1 to 100mA, f ≤ 1.0kHz	5
Thermal Resistance (Junction to Ambient)	θJA		165		°C/W	TO92; junction to ambient (absolute maximum table)	4
Thermal Resistance (Junction to Case)	θJC		81.63		°C/W	TO92	5
Full-range Temperature Coefficient			20		ppm/°C	Typical, per Features list	1

CAD (KiCad official)

Symbol: AZ431AZ-ATRE1
Footprint: Package_TO_SOT_THT:TO-92_Inline
3D model: TO-92-2.54mm (KiCad packages3D, STEP)
3D model files: az431az-atre1-etched.step / az431az-atre1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); az431az-atre1.step / az431az-atre1.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`az431az-atre1.step`	27 KB	You want the bare part, or you mark your own boards.
`az431az-atre1-etched.step`	1.4 MB	You want the part with `AZ431AZ-ATRE1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 393 faces against 19 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Diodes Incorporated datasheet (19 pp, sha256 af7f4848d81a3997, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF