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TL430

ADJUSTABLE SHUNT REGULATORS

 

 

SLVS050B – JUNE 1976 – REVISED JULY 1999

1

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

D

Temperature Compensated

D

Programmable Output Voltage

D

Low Output Resistance

D

Low Output Noise

D

Sink Capability up to 100 mA

     

description

The TL430 is a 3-terminal adjustable shunt

regulator, featuring excellent temperature

stability, wide operating current range, and low

output noise. The output voltage can be set by two

external resistors to any desired value between

3 V and 30 V. The TL430 can replace zener diodes

in many applications, providing improved

performance.

The TL430C is characterized for operation from

0

°

C to 70

°

C.

symbol

REF

CATHODE

ANODE

AVAILABLE OPTIONS

PACKAGED DEVICES

CHIP FORM

TA

PLASTIC

(LP)

CHIP FORM

(Y)

0

°

C to 70

°

C

TL430CLP

TL430Y

The LP package is available taped and reeled. Add R suffix to device

type (e.g., TL430CLPR). Chip forms are tested at 25

°

C.

Copyright 

©

 1999, Texas Instruments Incorporated

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.

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.

LP PACKAGE

(TOP VIEW)

REF

ANODE

CATHODE

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TL430

ADJUSTABLE SHUNT REGULATORS

 

 

SLVS050B – JUNE 1976 – REVISED JULY 1999

2

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

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

Regulator voltage (see Note 1) 

30 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Continuous regulator current 

150 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Package thermal impedance, 

θ

JA

 (see Notes 2 and 3):

156

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 

260

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Storage temperature range, T

stg

  – 65

°

C to 150

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

† Stresses beyond those listed under “absolute maximum ratings” 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 “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. All voltage values are with respect to the anode terminal.

2. Maximum power dissipation is a function of TJ(max), 

θ

JA, and TA. The maximum allowable power dissipation at any allowable

ambient temperature is PD = (TJ(max) – TA)/

θ

JA. 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

Regulator voltage, VZ

Vref

30

V

Regulator current, IZ

2

100

mA

Operating free-air temperature range, TA

TL430C

0

70

°

C

electrical characteristics over recommended operating conditions, T

A

 = 25

°

C (unless otherwise

noted)

PARAMETER

TEST

TEST CONDITIONS

TL430C

UNIT

PARAMETER

FIGURE

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI(ref)

Reference input voltage

1

VZ = VI(ref),

IZ = 10 mA

2.5

2.75

3

V

α

VI(ref)

Temperature coefficient of reference input

voltage

1

VZ = VI(ref),

TA = 0

°

C to 70

°

C

IZ = 10 mA,

120

ppm/

°

C

II(ref)

Reference input current

2

IZ = 10 mA,

R2 = 

R1 = 10 k

,

3

10

µ

A

IZK

Regulator current near lower knee of

regulation range

1

VZ = VI(ref)

0.5

2

mA

IZK

Regulator current at maximum

1

VZ = VI(ref)

50

mA

IZK

g

limit of regulation range

2

VZ = 5 V to 30 V,

See Note 4

100

mA

rz

Differential regulator resistance 

(see Note 5)

1

VZ = VI(ref),

IZ = (52 – 2) mA

1.5

3

W

VZ = 3 V

50

Vn

Noise voltage

2

f = 0.1 Hz to 10 Hz

VZ = 12 V

200

µ

V

VZ = 30 V

650

NOTES:

4. The average power dissipation, VZ 

 IZ 

 duty cycle, must not exceed the maximum continuous rating in any 10-ms interval.

5. The regulator resistance for VZ > VI(ref), rz, is given by:

rz

Ȁ +

rz

ǒ

1

)

R1

R2

Ǔ

background image

TL430

ADJUSTABLE SHUNT REGULATORS

 

 

SLVS050B – JUNE 1976 – REVISED JULY 1999

3

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended operating conditions, T

A

 = 25

°

C (unless otherwise

noted)

PARAMETER

TEST

TEST CONDITIONS

TL430Y

UNIT

PARAMETER

FIGURE

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI(ref)

Reference input voltage

1

VZ = VI(ref),

IZ = 10 mA

2.5

2.75

3

V

II(ref)

Reference input current

2

IZ = 10 mA,

R2 = 

R1 = 10 k

,

3

10

µ

A

IZK

Regulator current near lower knee of

regulation range

1

VZ = VI(ref)

0.5

2

mA

IZK

Regulator current at maximum limit of

1

VZ = VI(ref)

50

mA

IZK

g

regulation range

2

VZ = 5 V to 30 V,

See Note 4

100

mA

rz

Differential regulator resistance (see Note 5)

1

VZ = VI(ref), . . . 

IZ = (52 – 2) mA

1.5

3

W

VZ = 3 V

50

Vn

Noise voltage

2

f = 0.1 Hz to 10 Hz

VZ = 12 V

200

µ

V

VZ = 30 V

650

NOTES:

4. The average power dissipation, VZ 

 IZ 

 duty cycle, must not exceed the maximum continuous rating in any 10-ms interval.

5. The regulator resistance for VZ > VI(ref), rz, is given by:

rz

Ȁ +

rz

ǒ

1

)

R1

R2

Ǔ

PARAMETER MEASUREMENT INFORMATION

V

Z

+

V

I(ref)

ǒ

1

)

R1

R2

Ǔ

)

I

I(ref)

 

R1

VI(ref)

Input

VZ

IZ

II(ref)

IZ

VZ

Input

VI(ref)

R1

R2

TL430

TL430

Figure 1. Test Circuit for V

Z

 = V

I(ref)

Figure 2. Test Circuit for V

Z

 > V

I(ref)

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TL430

ADJUSTABLE SHUNT REGULATORS

 

 

SLVS050B – JUNE 1976 – REVISED JULY 1999

4

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

2.2

1.8

1.6

1.4

– Small-Signal Regulator Impedance –

2.6

2.8

f – Frequency – Hz

SMALL-SIGNAL REGULATOR IMPEDANCE

vs

FREQUENCY

3

2.4

2

80

40

20

0

0

1

2

I – Cathode Current – mA

120

140

V – Cathode Voltage – V

160

3

4

100

60

CATHODE CURRENT

vs

CATHODE VOLTAGE

10

102

103

105

104

106

z

z

VZ = VI(ref)

TA = 25

°

C

VZ = VI(ref)

TA = 25

°

C

IZM

IZ

IZK

Figure 3

Figure 4

APPLICATION INFORMATION

R1

R2

R

VI(ref)

VO

V+

V

O

[

ǒ

1

)

R1

R2

Ǔ

V

I(ref)

VO

V+

R1

R2

30 

V

O

[

ǒ

1

)

R1

R2

Ǔ

V

I(ref)

4.7 k

Figure 5. Shunt Regulator

Figure 6. Series Regulator

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TL430

ADJUSTABLE SHUNT REGULATORS

 

 

SLVS050B – JUNE 1976 – REVISED JULY 1999

5

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

APPLICATION INFORMATION

RCL

V+

IO

I

O

[

V

I(ref)

R

CL

VO

V+

GND

IN

OUT

R1

R2

V

O

+

ǒ

1

)

R1

R2

Ǔ

V

I(ref)

Min V

O

+

V

I(ref)

)

5 V

µ

A7805 Regulator

Figure 7. Current Limiter

Figure 8. Output Control of a 3-Terminal

Fixed Regulator

VO

R2

V+

R1

V

O

[

ǒ

1

)

R1

R2

Ǔ

V

I(ref)

VO

V+

R1

R2

Q1

V

limit

[

ǒ

1

)

R1

R2

Ǔ

ǒ

V

I(ref)

)

V

BE(Q1)

Ǔ

Figure 9. Higher-Current Applications

Figure 10. Crowbar

R1B

VCC

R1A

R2B

R2A

Low limit

[

V

I(ref)

ǒ

1

)

R1B

R2B

Ǔ

)

VD

High limit

[

V

I(ref)

ǒ

1

)

R1A

R2A

Ǔ

Figure 11. V

CC

 Monitor

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pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

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TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

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Copyright 

©

 1999, Texas Instruments Incorporated