Wing Shing TL431CPK Datasheet

TL431A Adjustable Precision Shunt Regulator

TO-92

REF

ANODE

CATHODE

SOT-89

REF

ANODE

CATHODE

TL431CLP

TL431CPK

FEATURES

• Programmable Output Voltage to 36V

• Low Dynamic Output Impedance 0.2Ω

• Sink Current Capability of 0.1 mA to 100 mA

• Equivalent Full-Range Temperature Coefficient of 50 ppm/

• Temperatu r e Compensated for Operation over Full Rated

Operating Temperatur e Range

• Low Output Noise Voltage

• Fast Turn on Response

DESCRIPTION

The TL431A is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between Vref (approximately 2.5 volts) and 36 volts with two external resistors. These
devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacement for zener diodes in many applications.
The TL431A is characterized for operation from -0

o

C to +70oC.

SYMBOL FUNCTIONAL BLOCK DIAGRAM

o

C

SCHEMATIC DIAGRAM

Wing Shing Computer Components Co., (H.K.)Ltd. Tel:[phone] Fax:[phone]
Homepage: http://www.wingshing.com E-mail: [e-mail]

1

TL431A Adjustable Precision Shunt Regulator

A

A

A

ABSOLUTE MAXIMUM RATINGS

(Operating temperature range applies unless otherwise specified)

Characteristic Symbol Value Unit

Cathode Voltage V
Cathode Current Range (Continuous) I
Reference Input Current Range I
Operating Temperatur e Range T
Storage Temperature Ran g e T

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Test Condition Min Typ Max Unit

Cathode Voltage V
Cathode Current I

KA

K

ELECTRICAL CHARACTERISTICS

(TA = 25oC, unless otherwise specified)

Characteristic Symbol Test Condition Min Typ Max Unit

Reference Input Voltage V
Deviation of Reference Input Voltage

Over-Temperature (Note 1)

Ratio of Change in Reference Input
Voltage to the Change in

Cathode Voltage
Reference Input Current I
Deviation of Reference Input Current

Over Full Temperature Range

Minimum Cath od e Current for
Regulation

Off-State Cathode C urrent I
Dynamic Impedance (Note2) Z

V

REF(dev)

∆∆V

V

REF

I

REF(dev)

I

K(min)

K(off)

REF

KA

REF

KA

IK = 10mA

IK = 10mA, R1 = 10KΩ, R2 = ∞
IK = 10mA, R1 = 10KΩ, R2 = ∞

VKA = V

KA

K

REF

A

stg

VKA = V
VKA = V

, IK = 10mA 2.475 2.495 2.515 V

REF

, IK = 10mA

REF

≤ TA ≤ T

T

min

Ta = Full Range

VKA = V

VKA = 36V,

REF

VREF

, IK = 10mA to 100mA
f ≤ 1.0KHz

37 V

-100 ~ +150 mA

0.05 ~ +10 mA
0 ~ +70

-65 ~ +150

V

REF

36 V

1.0 100 mA

317 mV

max

∆V

∆K

KA =

KA =

10V-V

REF

36V- 10V

-1.4 -2.7

-1.0 -2.0
1,8 4

0.4 1.2

REF

0.5 1.0 mA

= 0 0.26 1.0

0.22 0.4

o

o

C
C

mV/V

µA
µA

µA

Ω

Note: 1. The deviation parameters V

REF(dev)

and I

are defined as the differences between the maximum and minimum values ob tained over t he rated

REF(dev)

temperature range.
V

REF(dev)

= V

(max) - V

REF

REF

(min)

The equivalent full-range temperature coefficient of the reference
input voltage, αV

αV

( )

REF

ppm

C°

is defined as:

REF

( )

V@C

=

REF(dev)

V

REF

∆

°

Ta

× 10

6

Where ∆T

is the rated operating free-air temperature range of

A

the device.
αV

maximum V

can be positive or negative depending on whether minimum V

REF

respectively, occurs at the

REF

REF

or

lower temperature.

2. The dynamic impedance is defined as:

KA

∆

V

=

KA

Z

Wing Shing Computer Components Co., (H.K.)Ltd. Tel:[phone] Fax:[phone]
Homepage: http://www.wingshing.com E-mail: [e-mail]

K

∆

I

2