Texas Instruments TLV431ILP, TLV431ILPR, TLV431IDBV, TLV431CLPR, TLV431CLP Datasheet

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TLV431, TLV431A

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS139C ± JULY 1996 ± REVISED JULY 1999

D Low-Voltage Operation . . . Down to 1.24 V		D PACKAGE
D 1% Reference-Voltage Tolerance (TLV431A)			(TOP VIEW)

D Adjustable Output Voltage, VO = Vref to 6 V	CATHODE		1	8	REF

D Low Operational Cathode Current . . . 80 µA Typ	ANODE		2	7	ANODE

D 0.25-Ω Typical Output Impedance	ANODE		3	6	ANODE

	NC		4	5	NC
D Package Options Include Plastic Small-Outline


(D), SOT-23 (DBV), and Cylindrical (LP)	NC ± No internal connection
Packages

description	DBV PACKAGE
			(TOP VIEW)

The TLV431 and TLV431A are low-voltage three-terminal adjustable voltage references with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between Vref (1.24 V) and 6 V with two external resistors (see Figure 2). The TLV431 and TLV431A operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

NC 1 5 ANODE

NC 2

CATHODE 3 4 REF

NC ± No internal connection

LP PACKAGE

When used with an optocoupler, the TLV431 and TLV431A are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLV431 and TLV431A excellent replacements for low-voltage zener diodes in many applications, including onboard regulation and adjustable power supplies.

(TOP VIEW)

CATHODE

ANODE

REF

The TLV431C and TLV431AC devices are characterized for operation from 0°C to 70°C. The TLV431I and TLV431AI devices are characterized for operation from ±40°C to 85°C.

AVAILABLE OPTIONS

	PACKAGED DEVICES			CHIP
TA	TO-92	SOIC	SOT-23	FORM
	(LP)	(D)	(DBV)	(Y)

0°C to 70°C	TLV431CLP	Ð	TLV431CDBV
0°C to 70°C	TLV431ACLP	Ð	TLV431ACDBV
	TLV431ACLP	Ð	TLV431ACDBV	TLV431Y

±40°C to 85°C	TLV431ILP	TLV431ID	TLV431IDBV
	TLV431ILP	TLV431ID	TLV431IDBV
	TLV431AILP	TLV431AID	TLV431AIDBV
	TLV431AILP	TLV431AID	TLV431AIDBV

The LP package is available taped and reeled. Add the suffix R to the device type (e.g., TLV431ACLPR). The D and DBV are available only taped and reeled (e.g., TLV431IOR). Chip forms are tested at 25°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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Texas Instruments TLV431ILP, TLV431ILPR, TLV431IDBV, TLV431CLPR, TLV431CLP Datasheet

TLV431, TLV431A

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS139C ± JULY 1996 ± REVISED JULY 1999

logic symbol

REF

ANODE CATHODE

logic diagram (positive logic)

CATHODE

REF				+
REF				+
				±

Vref = 1.24 V

ANODE

equivalent schematic

CATHODE

REF

ANODE

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TLV431, TLV431A

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS139C ± JULY 1996 ± REVISED JULY 1999

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²

Cathode voltage, VKA (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . 7 V
Continuous cathode current range, IK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±20 mA to 20 mA
Reference current range, Iref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.05 mA to 3 mA
Package thermal impedance, θJA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 97°C/W
DBV package . . . . . . . . . . . . . . . . .	. . . . . . . 347°C/W
LP package . . . . . . . . . . . . . . . . . . .	. . . . . . . 156°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . 260°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. ±65°C to 150°C

²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. Voltage values are with respect to the anode terminal unless otherwise noted.

2.Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) ± TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.

3.The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.

recommended operating conditions

		MIN	MAX	UNIT

Cathode voltage, VKA		Vref	6	V
Cathode current, IK		0.1	15	mA
Operating free-air temperature range, TA	TLV431C, TLV431AC	0	70	°C

	TLV431I, TLV431AI	±40	85
	TLV431I, TLV431AI	±40	85

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DVKA

TLV431, TLV431A

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS139C ± JULY 1996 ± REVISED JULY 1999

electrical characteristics at 25°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLV431C

TLV431I

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

TA = 25°C

1.222

1.24

1.258

1.222

1.24

1.258

Vref

Reference voltage

VKA = Vref,

TA = full range

IK = 10 mA

(see Note 4 and

1.21

1.27

1.202

1.278

Figure 1)

Vref deviation

VKA = Vref, IK = 10 mA,

Vref(dev)

over full temperature range

(see Note 4 and Figure 1)

(see Note 5)

Vref

Ratio of Vref change

IK = 10 mA,

VKA = Vref to 6 V,

±1.5

±2.7

±1.5

±2.7

mV/V

VKA

in cathode voltage change

(see Figure 2)

Iref

Reference terminal current

IK = 10 mA, R1 = 10 kΩ, R2 = open

0.15

0.5

0.15

0.5

µA

(see Figure 2)

Iref deviation

IK = 10 mA, R1 = 10 kΩ, R2 = open

µA

Iref(dev)

over full temperature range

0.05

0.3

0.1

0.4

(see Note 4 and Figure 2)

(see Note 5)

IK(min)

Minimum cathode current

VKA = Vref

(see Figure 1)

µA

for regulation

IK(off)

Off-state cathode current

VKA = 6 V,

Vref = 0

0.001

0.1

0.001

0.1

µA

(see Figure 3)

Dynamic impedance

VKA = Vref, f ≤ 1 kHz,

IK = 0.1 mA to 15 mA

0.25

0.4

0.25

0.4

(see Note 6)

(see Figure 1)

NOTES: 4. Full range is ±40°C to 85°C for the TLV431I, and 0°C to 70°C for the TLV431C.

5.The deviation parameters Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage, aVref, is defined

as:

			Vref(dev)				106

	ppm		V	ref	at 25°C
			V		at 25°C
aVref
aVref	°C	+			DT	A
						A
where:
TA is the rated operating temperature range of the device.

aVref can be positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature.

6. The dynamic impedance is defined as: zKA + DIKA

When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:

z	DV	z	KA	1 ) R1
	KA + DI [		KA	R2

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DVKA

TLV431, TLV431A

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS139C ± JULY 1996 ± REVISED JULY 1999

electrical characteristics at 25°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLV431AC

TLV431AI

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

TA = 25°C

1.228

1.24

1.252

1.228

1.24

1.252

Vref

Reference voltage

VKA = Vref,

TA = full range,

IK = 10 mA,

(see Note 4 and

1.221

1.259

1.215

1.265

Figure 1)

Vref deviation

VKA = Vref, IK

= 10 mA

Vref(dev)

over full temperature range

(see Note 4 and Figure 1)

(see Note 5)

Vref

Ratio of Vref change

IK = 10 mA,

VKA = Vref to 6 V

±1.5

±2.7

±1.5

±2.7

mV/V

VKA

in cathode voltage change

(see Figure 2)

Iref

Reference terminal current

IK = 10 mA,

R1 = 10 kΩ

0.15

0.5

0.15

0.5

µA

(see Figure 2)

Iref deviation

IK = 10 mA, R1 = 10 kΩ, R2 = open

µA

Iref(dev)

over full temperature range

0.05

0.3

0.1

0.4

(see Note 4 and Figure 2)

(see Note 5)

IK(min)

Minimum cathode current

VKA = Vref

(see Figure 1)

µA

for regulation

IK(off)

Off-state cathode current

VKA = 6 V,

Vref = 0,

0.001

0.1

0.001

0.1

µA

(see Figure 3)

Dynamic impedance

VKA = Vref, f ≤ 1 kHz,

IK = 0.1 mA to 15 mA

0.25

0.4

0.25

0.4

(see Note 6)

(see Figure 1)

NOTES: 4. Full range is ±40°C to 85°C for the TLV431I, and 0°C to 70°C for the TLV431C.

as:

			Vref(dev)					106
	ppm			V	ref	at 25°C		106
aVref	ppm				ref
aVref	°C	+				DT	A
							A
where:
TA is the rated operating temperature range of the device.

aVref can be positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature.

6. The dynamic impedance is defined as: zKA + DIKA

When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:

z	DV	z	KA	1 ) R1
	KA + DI [		KA	R2

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