MOTOROLA TL431IP, TL431ILPRP, TL431ILPRA, TL431ID, TL431ILP Datasheet

Programmable

Precision References

The TL431, A, B integrated circuits are three±terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.

•Programmable Output Voltage to 36 V

•Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)

•Low Dynamic Output Impedance, 0.22 Ω Typical

•Sink Current Capability of 1.0 mA to 100 mA

•Equivalent Full±Range Temperature Coefficient of 50 ppm/°C Typical

•Temperature Compensated for Operation over Full Rated Operating Temperature Range

•Low Output Noise Voltage

ORDERING INFORMATION

		Operating
	Device	Temperature Range	Package
	TL431CLP, ACLP, BCLP		TO±92
	TL431CP, ACP, BCP	TA = 0° to +70°C	Plastic
	TL431CDM, ACDM, BCDM		Micro±8
	TL431CD, ACD, BCD		SOP±8
	TL431ILP, AILP, BILP		TO±92
	TL431IP, AIP, BIP	TA = ±40° to +85°C	Plastic
	TL431IDM, AIDM, BIDM		Micro±8
	TL431ID, AID, BID		SOP±8

Order this document by TL431/D

TL431, A, B

Series

PROGRAMMABLE

PRECISION REFERENCES

SEMICONDUCTOR

TECHNICAL DATA

LP SUFFIX
PLASTIC PACKAGE
CASE 29	Pin 1.	Reference
(TO±92)
	2.	Anode
1	3.	Cathode
	2
	3
	P SUFFIX
	PLASTIC PACKAGE
8	CASE 626
1
	DM SUFFIX
8	PLASTIC PACKAGE

1CASE 846A (Micro±8)

Cathode	1					8	Reference
N/C	2					7	N/C
N/C	3					6	Anode
N/C	4					5	N/C

(Top View)

	D SUFFIX
	PLASTIC PACKAGE		8
	CASE 751
	(SOP±8)			1
	Cathode	1	8	Reference
	Anode	2	7	Anode
		3	6
	N/C	4	5	N/C
		(Top View)

SOP±8 is an internally modified SO±8 package. Pins 2, 3, 6 and 7 are electrically common to the die attach flag. This internal lead frame modification decreases power dissipation capability when appropriately mounted on a printed circuit board. SOP±8 conforms to all external dimensions of the standard SO±8 package.

Motorola, Inc. 1999

Rev 7

TL431, A, B Series

	Symbol
	Cathode
	(K)
	Reference
	(R)
	Anode
	(A)
Representative Block Diagram
Reference		Cathode
(R)	+	(K)
	±
	2.5 Vref
	Anode (A)

Representative Schematic Diagram

Component values are nominal

Cathode (K)

	Reference	800	800
	(R)		20 pF
		3.28 k	150
			4.0 k
		20 pF
			10 k
	2.4 k	7.2 k
			1.0 k
		800

						Anode (A)
	This device contains 12 active transistors.
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless
otherwise noted.)
Rating		Symbol	Value		Unit
Cathode to Anode Voltage		VKA	37		V
Cathode Current Range, Continuous		IK	±100 to +150		mA
Reference Input Current Range, Continuous		Iref	±0.05 to +10		mA
Operating Junction Temperature		TJ	150		°C
Operating Ambient Temperature Range		TA			°C
TL431I, TL431AI, TL431BI			±40 to +85
TL431C, TL431AC, TL431BC			0 to +70
Storage Temperature Range		Tstg	±65 to +150		°C
Total Power Dissipation @ TA = 25°C		PD			W
Derate above 25°C Ambient Temperature
D, LP Suffix Plastic Package			0.70
P Suffix Plastic Package			1.10
DM Suffix Plastic Package			0.52
Total Power Dissipation @ TC = 25°C		PD			W
Derate above 25°C Case Temperature
D, LP Suffix Plastic Package			1.5
P Suffix Plastic Package			3.0

NOTE: ESD data available upon request.

RECOMMENDED OPERATING CONDITIONS

Condition	Symbol	Min	Max	Unit
Cathode to Anode Voltage	VKA	Vref	36	V
Cathode Current	IK	1.0	100	mA

THERMAL CHARACTERISTICS

		D, LP Suffix	P Suffix	DM Suffix
Characteristic	Symbol	Package	Package	Package	Unit
Thermal Resistance, Junction±to±Ambient	RθJA	178	114	240	°C/W
Thermal Resistance, Junction±to±Case	RθJC	83	41	±	°C/W

2	MOTOROLA ANALOG IC DEVICE DATA

TL431, A, B Series

ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)

					TL431I			TL431C
Characteristic	Symbol
				Min	Typ	Max	Min	Typ	Max	Unit
Reference Input Voltage (Figure 1)		Vref								V
VKA = Vref, IK = 10 mA
TA = 25°C				2.44	2.495	2.55	2.44	2.495	2.55
TA = Tlow to Thigh (Note 1)				2.41	±	2.58	2.423	±	2.567
Reference Input Voltage Deviation Over		Vref		±	7.0	30	±	3.0	17	mV
Temperature Range (Figure 1, Notes 1, 2)
VKA= Vref, IK = 10 mA
Ratio of Change in Reference Input Voltage		DVref								mV/V
to Change in Cathode to Anode Voltage
	DVKA
IK = 10 mA (Figure 2),
VKA = 10 V to Vref				±	±1.4	±2.7	±	±1.4	±2.7
VKA = 36 V to 10 V				±	±1.0	±2.0	±	±1.0	±2.0
Reference Input Current (Figure 2)		Iref								μA
IK = 10 mA, R1 = 10 k, R2 = ∞
TA = 25°C				±	1.8	4.0	±	1.8	4.0
TA = Tlow to Thigh (Note 1)				±	±	6.5	±	±	5.2
Reference Input Current Deviation Over		Iref		±	0.8	2.5	±	0.4	1.2	μA
Temperature Range (Figure 2, Note 1, 4)
IK = 10 mA, R1 = 10 k, R2 = ∞
Minimum Cathode Current For Regulation		Imin		±	0.5	1.0	±	0.5	1.0	mA
VKA = Vref (Figure 1)
Off±State Cathode Current (Figure 3)		Ioff		±	260	1000	±	260	1000	nA
VKA = 36 V, Vref = 0 V
Dynamic Impedance (Figure 1, Note 3)		|ZKA|		±	0.22	0.5	±	0.22	0.5	Ω
VKA = Vref, IK = 1.0 mA to 100 mA
f ≤ 1.0 kHz

NOTES: 1. Tlow = ±40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM
= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,
TL431ACDM, TL431BCDM
Thigh= +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM
= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM, TL431BCDM
2. The deviation parameter Vref is defined as the difference between the maximum and minimum values obtained over the full operating ambient
temperature range that applies.
Vref max	Vref = Vref max
	±Vref min
Vref min	TA = T2 ± T1

T1 Ambient Temperature

T2

The average temperature coefficient of the reference input voltage, αVref is defined as:

D Vref

X 106

Vref

ppm

Vref @ 25_C

+

D Vref x 106

_

+

D

TA

D

TA

(Vref

_

C

@ 25 C)

αVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)

	Example : DVref + 8.0 mV and slope is positive,				0.008 x 106
	Vref @ 25_C + 2.495 V, DTA + 70_C
					a Vref + 70 (2.495) + 45.8 ppm _C
	3. The dynamic impedance ZKA is defined as |Z	| +	D VKA
			D IK
	KA

When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |ZKA | [ |ZKA| 1 ) R1R2

MOTOROLA ANALOG IC DEVICE DATA	3

TL431, A, B Series

ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)

TL431AI

TL431AC

TL431BI

Characteristic

Symbol

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Unit

Reference Input Voltage (Figure 1)

Vref

V

VKA = Vref, IK = 10 mA

TA = 25°C

2.47

2.495

2.52

2.47

2.495

2.52

2.483

2.495

2.507

TA = Tlow to Thigh

2.44

±

2.55

2.453

±

2.537

2.475

2.495

2.515

Reference Input Voltage Deviation Over

Vref

±

7.0

30

±

3.0

17

±

3.0

17

mV

Temperature Range (Figure 1, Notes 1, 2)

VKA= Vref, IK = 10 mA

Ratio of Change in Reference Input Voltage

DVref

mV/V

to Change in Cathode to Anode Voltage

DVKA

IK = 10 mA (Figure 2),

VKA = 10 V to Vref

±

±1.4

±2.7

±

±1.4

±2.7

±

±1.4

±2.7

VKA = 36 V to 10 V

±

±1.0

±2.0

±

±1.0

±2.0

±

±1.0

±2.0

Reference Input Current (Figure 2)

Iref

μA

IK = 10 mA, R1 = 10 k, R2 = ∞

TA = 25°C

±

1.8

4.0

±

1.8

4.0

±

1.1

2.0

TA = Tlow to Thigh (Note 1)

±

±

6.5

±

±

5.2

±

±

4.0

Reference Input Current Deviation Over

Iref

±

0.8

2.5

±

0.4

1.2

±

0.8

2.5

μA

Temperature Range (Figure 2, Note 1)

IK = 10 mA, R1 = 10 k, R2 = ∞

Minimum Cathode Current For Regulation

Imin

±

0.5

1.0

±

0.5

1.0

±

0.5

1.0

mA

VKA = Vref (Figure 1)

Off±State Cathode Current (Figure 3)

Ioff

±

260

1000

±

260

1000

±

230

500

nA

VKA = 36 V, Vref = 0 V

Dynamic Impedance (Figure 1, Note 3)

|ZKA|

±

0.22

0.5

±

0.22

0.5

±

0.14

0.3

Ω

VKA = Vref, IK = 1.0 mA to 100 mA

f ≤ 1.0 kHz

NOTES: 1. Tlow = ±40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM
= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,
TL431ACDM, TL431BCDM
Thigh= +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM
= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM, TL431BCDM
2. The deviation parameter Vref is defined as the difference between the maximum and minimum values obtained over the full operating ambient
temperature range that applies.
Vref max	Vref = Vref max
	±Vref min
Vref min	TA = T2 ± T1

T1 Ambient Temperature

T2

The average temperature coefficient of the reference input voltage, αVref is defined as:

D Vref

X 106

Vref

ppm

Vref @ 25_C

+

D Vref x 106

_

+

D

TA

D

TA

(Vref

_

C

@ 25 C)

αVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)

	Example : DVref + 8.0 mV and slope is positive,				0.008 x 106
	Vref @ 25_C + 2.495 V, DTA + 70_C
					a Vref + 70 (2.495) + 45.8 ppm _C
	3. The dynamic impedance ZKA is defined as |Z	| +	D VKA
	KA		D IK

When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |ZKA | [ |ZKA| 1 ) R1R2

4	MOTOROLA ANALOG IC DEVICE DATA

TL431, A, B Series

Figure 1. Test Circuit for VKA = Vref

Figure 2. Test Circuit for VKA > Vref

Figure 3. Test Circuit for Ioff

Input	Input
	VKA
	IK
	R1	Iref
Vref	R2
		Vref

Figure 4. Cathode Current versus

Cathode Voltage

	150
		VKA = Vref
(mA)	100	TA = 25°C
		Input	VKA
CURRENT		IK
	50
, CATHODE	0
	±50
K
I
	±100	±1.0	0	1.0	2.0	3.0
	±2.0

VKA, CATHODE VOLTAGE (V)

VKA	Input	V
		KA
IK		Ioff
VKA + Vref 1 ) R2R1	) Iref S R1

			Figure 5. Cathode Current versus
	800			Cathode Voltage
			VKA = Vref
μA)	600	Input	TA = 25°C			IMin
				VKA
(				IK
CURRENT	400
CATHODE,	200
K	0
I
	±200		0	1.0	2.0	3.
	±1.0
				VKA, CATHODE VOLTAGE (V)

Figure 6. Reference Input Voltage versus

Ambient Temperature

	2600		VKA
(mV)	Input
	2580		IKV	= V
VOLTAGE			KA	ref		Vref Max = 2550 mV
	2560	V	IK = 10 mA
		ref
	2540
	2520
INPUT
	2500					Vref Typ = 2495 mV
, REFERENCE	2480
	2460
	2440					Vref Min = 2440 mV
	2420
ref
V	2400	±25	0	25	50	75	100	125
	±55
			TA, AMBIENT TEMPERATURE (°C)

Figure 7. Reference Input Current versus Ambient Temperature

( μA)	3.0
CURRENT	2.5
	2.0
INPUT	1.5
REFERENCE	1.0	Input	IK = 10 mA		VKA
			Iref	IK
		10k
	0.5
,
ref
I	0
		±25		0	25	50	75	100	12
	±55
			TA, AMBIENT TEMPERATURE (°C)

MOTOROLA ANALOG IC DEVICE DATA	5