SGS Thomson Microelectronics TL431IN, TL431ID, TL431CZ, TL431IZ, TL431AIZ Datasheet

TL431

PROGRAMMABLE VOLTAGE REFERENCE

.ADJUSTABLE OUTPUT VOLTAGE :

.2.5 to 36V

.SINK CURRENT CAPABILITY : 1 to 100mA

.TYPICAL OUTPUT IMPEDANCE : 0.22Ω 1% AND 2% VOLTAGE PRECISION

DESCRIPTION

The TL431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire temperature range of operation.

The output voltage may be set to any value between Vref (approximately 2.5V) and 36V with two external resistors.

The TL431 operates with a wide current range from 1 to 100mA with a typical dynamic impedance of 0.22Ω.

Z

TO92

(Plastic Package)

N

DIP8

(Plastic Package)

D

SO8

(Batwing Plastic Micropackage)

ORDER CODES

	Part number	Temperature Range		Package
			Z	N	D
	TL431C/AC	0oC, +70oC	•	•	•
	TL431I/AI	-40oC, +105oC	•	•	•

PIN CONNECTIONS

	TO92		DIP8					SO8
	(Top view)		(Top view)					(Top view)
		8	7	6	5		8	7	6	5
Ca th o d e Ano d e Re fere n c e					1	- Cathode				1	- Cathode
1	2	3
					2	- N.C.				2	- Anode
					3	- N.C.				3	- Anode
					4	- N.C.				4	- N.C.
					5	- N.C.				5	- N.C.
					6	- Anode				6	- Anode
					7	- N.C.				7	- Anode
					8	- Reference				8	- Reference
		1	2	3	4		1	2	3	4

November 1998

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TL431

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VKA	Cathode to Anode Voltage	37	V
IK	Continuous Cathode Current Range	-100 to +150	mA
Iref	Reference Input Current Range	-0.05 to +10	mA
Toper	Operating Free-air Temperature Range TL431C/AC	0 to +70	oC
	TL431I/AI	-40 to +105
Tstg	Storage Temperature Range	-65 to +150	oC

OPERATING CONDITIONS

Symbol	Parameter	Value	Unit
VKA	Cathode to Anode Voltage	Vref to 36	V
IK	Cathode Current	1 to 100	mA

ELECTRICAL CHARACTERISTICS

Tamb = 25oC (unless otherwise specified)

Symbol			Parameter			TL431C		TL431AC		Unit
						Min. Typ. Max. Min. Typ. Max.
Vref	Reference Input Voltage - (figure 1)				Tamb = 25oC					V
	VKA = Vref, IK = 10mA					2.44 2.495	2.55	2.47 2.495	2.52
			Tmin. ≤ Tamb	≤ Tmax.		2.423	2.567	2.453	2.537
Vref	Reference Input Voltage Deviation Over									mV
	Temperature Range - (figure 1, note1)
	VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.					3	17	3	15
Vref	Ratio of Change in Reference Input Voltage to									mV/V
VKA	Change in Cathode to Anode Voltage - (figure 2)					-1.4	-2.7	-1.4	-2.7
	IK = 10mA		VKA = 10V to Vref
			VKA = 36V to 10V			-1	-2	-1	-2
Iref	Reference Input Current - (figure 2)									μA
	IK = 10mA, R1 = 10kΩ, R2 = ∞
			Tamb = 25oC			1.8	4	1.8	4
			Tmin. ≤ Tamb ≤ Tmax.				5.2		5.2
Iref	Reference Input Current Deviation Over									μA
	Temperature Range - (figure 2)
	IK = 10mA, R1 = 10kΩ, R2 = ∞					0.4	1.2	0.4	1.2
			Tmin. ≤ Tamb	≤ Tmax.
Imin	Minimum Cathode Current for Regulation - (figure 1)									mA
	VKA = Vref					0.5	1	0.5	0.6
Ioff	Off-State Cathode Current - (figure 3)					2.6	1000	2.6	1000	nA
|ZKA|	Dynamic Impedance - (figure 1, note 2)									Ω
	VKA = Vref,	IK = 1 to 100mA, f		≤ 1kHz		0.22	0.5	0.22	0.5
Notes : 1.	Vref is defined as the difference between the maximum and minimum values obtained over the full temperature
	range.
	Vref = Vref max. - Vref min		V re f ma x.
			Vre fm in.
				T1	T2	Tempe ra tur e
2.	The dynamic Impedance is defined as |ZKA| =				VKA
					IK

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										TL431
ELECTRICAL CHARACTERISTICS
Tamb = 25oC (unless otherwise specified)
Symbol			Parameter			TL431I		TL431AI		Unit
						Min. Typ. Max. Min. Typ. Max.
Vref	Reference Input Voltage - (figure 1)				Tamb = 25oC					V
	VKA = Vref, IK = 10mA					2.44 2.495	2.55	2.47 2.495	2.52
			Tmin. ≤ Tamb	≤ Tmax.		2.41	2.58	2.44	2.55
Vref	Reference Input Voltage Deviation Over									mV
	Temperature Range - (figure 1, note1)
	VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.					7	30	7	30
Vref	Ratio of Change in Reference Input Voltage to									mV/V
VKA	Change in Cathode to Anode Voltage - (figure 2)					-1.4	-2.7	-1.4	-2.7
	IK = 10mA		VKA = 10V to Vref
			VKA = 36V to 10V			-1	-2	-1	-2
Iref	Reference Input Current - (figure 2)									μA
	IK = 10mA, R1 = 10kΩ, R2 = ∞
			Tamb = 25oC			1.8	4	1.8	4
			Tmin. ≤ Tamb ≤ Tmax.				6.5		6.5
Iref	Reference Input Current Deviation Over									μA
	Temperature Range - (figure 2)
	IK = 10mA, R1 = 10kΩ, R2 = ∞					0.8	2.5	0.8	1.2
			Tmin. ≤ Tamb	≤ Tmax.
Imin	Minimum Cathode Current for Regulation - (figure 1)									mA
	VKA = Vref					0.5	1	0.5	0.7
Ioff	Off-State Cathode Current - (figure 3)					2.6	1000	2.6	1000	nA
|ZKA|	Dynamic Impedance - (figure 1, note 2)									Ω
	VKA = Vref,	IK = 1 to 100mA, f		≤ 1kHz		0.22	0.5	0.22	0.5
Notes : 1.	Vref is defined as the difference between the maximum and minimum values obtained over the full temperature
	range.
	Vref = Vref max. - Vref min		V re f ma x.
			Vre fm in.
				T1	T2	Tempe ra tur e
2.	The dynamic Impedance is defined as |ZKA| =				VKA
					IK

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