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TLV431BE5TA

Diodes Incorporated · Voltage Reference · SOT-25

TLV431BE5TA from Diodes Incorporated, in a SOT-25. 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	N/C	unconnected	The datasheet lists this pin as N/C with no function given, so it should be left unconnected.
2	N/C‡	unconnected	The die is attached to this pin and it is electrically connected to pin 5, so per the layout note it must be left floating or connected to pin 5 (anode).
3	CATHODE	passive	Cathode of the shunt regulator, rated 20 V maximum with continuous cathode current of -20 to +20 mA absolute maximum and 0.1 to 15 mA recommended operating range.
4	REF	input	Reference input that the regulator holds at VREF of 1.24 V typical, with reference input current limited to -0.05 to +3 mA absolute maximum.
5	ANODE	passive	Anode, which is the reference point for all voltages stated in the datasheet and is electrically connected to pin 2 through the die.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-25
Category	Power Management (PMIC)
Pins	5

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Reference Voltage (TLV431B, TA = +25°C)	VREF	1.234	1.24	1.246	V	VKA = VREF, TA = +25°C	3
Reference Voltage (TLV431B, TA = 0 to +70°C)	VREF	1.227		1.253	V	VKA = VREF, TA = 0 to +70°C	3
Reference Voltage (TLV431B, TA = -40°C to +85°C)	VREF	1.224		1.259	V	VKA = VREF, TA = -40°C to +85°C	3
Reference Voltage (TLV431B, TA = -40°C to +125°C)	VREF	1.221		1.265	V	VKA = VREF, TA = -40°C to +125°C	3
Deviation of Reference Voltage Over Full Temperature Range (0 to +70°C)	VREF(dev)		4	12	mV	VKA = VREF, TA = 0 to +70°C	3
Deviation of Reference Voltage Over Full Temperature Range (-40°C to +85°C)	VREF(dev)		6	20	mV	VKA = VREF, TA = -40°C to +85°C	3
Deviation of Reference Voltage Over Full Temperature Range (-40°C to +125°C)	VREF(dev)		11	31	mV	VKA = VREF, TA = -40°C to +125°C	3
Ratio of Change in Reference Voltage to Change in Cathode Voltage (6V)	ΔVREF/ΔVKA		-1.5	-2.7	mV/V	VKA for VREF to 6V	3
Ratio of Change in Reference Voltage to Change in Cathode Voltage (18V)	ΔVREF/ΔVKA		-1.5	-2.7	mV/V	VKA for VREF to 18V	3
Reference Input Current	IREF		0.15	0.5	µA	R1 = 10kΩ, R2 = OC	3
IREF Deviation Over Full Temperature Range (0 to +70°C)	IREF(dev)		0.05	0.3	µA	R1 = 10kΩ, R2 = OC, TA = 0 to +70°C	3
IREF Deviation Over Full Temperature Range (-40°C to +85°C)	IREF(dev)		0.1	0.4	µA	R1 = 10kΩ, R2 = OC, TA = -40°C to +85°C	3
IREF Deviation Over Full Temperature Range (-40°C to +125°C)	IREF(dev)		0.15	0.5	µA	R1 = 10kΩ, R2 = OC, TA = -40°C to +125°C	3
Minimum Cathode Current for Regulation (0 to +70°C)	IKMIN		55	80	µA	VKA = VREF, TA = 0 to +70°C	3
Minimum Cathode Current for Regulation (-40°C to +85°C)	IKMIN		55	80	µA	VKA = VREF, TA = -40°C to +85°C	3
Minimum Cathode Current for Regulation (-40°C to +125°C)	IKMIN		55	100	µA	VKA = VREF, TA = -40°C to +125°C	3
Off-State Current	IK(OFF)		0.001	0.1	µA	VKA = 18V, VREF = 0	3
Dynamic Output Impedance	ZKA		0.25	0.4	Ω	VKA = VREF, f = <1kHz, IK = 0.1mA to 15mA	3
Cathode Voltage	VKA			18	V		2
Cathode Current	IKA	0.1		15	mA		2
Operating Ambient Temperature Range	TA	-40		125	°C		2
Cathode Voltage	VKA			20	V	Voltages relative to ANODE pin	2
Continuous Cathode Current	IKA	-20		20	mA		2
Reference Input Current Range	IREF	-0.05		3	mA		2
ESD Susceptibility HBM (Human Body Model)				4	kV		2
ESD Susceptibility MM (Machine Model)				400	V		2
ESD Susceptibility CDM (Charged Device Model)				1	kV		2
Operating Junction Temperature	TJ	-40		150	°C		2
Storage Temperature	TSTG	-65		150	°C		2
Package Thermal Resistance Junction-to-Ambient, SOT25	JA		250		°C/W	TA = +25°C, TJ = +150°C	2
Package Power Dissipation, SOT25	PDIS		500		mW	TA = +25°C, TJ = +150°C	2

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		tin	 Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208  Weight: 0.009 grams (Approximate)	16

CAD (KiCad official)

Symbol: TLV431BE5TA
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-25 (KiCad packages3D, STEP)
3D model files: tlv431be5ta-etched.step / tlv431be5ta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlv431be5ta.step / tlv431be5ta.glb are the bare package body.

Provenance

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

Datasheet: Diodes Incorporated datasheet (17 pp, sha256 bfc6983112ce20da, retrieved 2026-10-18, 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