文档库 最新最全的文档下载
当前位置:文档库 › TL431(utc)

TL431(utc)

TL431(utc)
TL431(utc)

UNISONIC TECHNOLOGIES CO., LTD

TL431LINEAR INTEGRATED CIRCUIT

PROGRAMMABLE PRECISION

REFERENCE

DESCRIPTION

The UTC TL431 is a three-terminal adjustable regulator with a

guaranteed thermal stability over applicable temperature ranges.

The output voltage may be set to any value between V REF

(approximately 2.5V) and 36V with two external resistors. It provides

very wide applications, including shunt regulator, series regulator,

switching regulator, voltage reference and others.

FEATURES

* Programmable output Voltage to 36V.

* Low dynamic output impedance 0.2?.

* Sink current capability of 1.0 to 100mA.

* Equivalent full-range temperature coefficient of 50ppm/ °C

typical for operation over full rated operating temperature range.

ORDERING INFORMATION

Ordering Number Pin Assignment

Package Packing Normal Lead Free Halogen Free12345678

Tape

Reel

SOT-89

R A K----- TL431-AB3-R TL431K-AB3-R TL431G-AB3-R

Reel

Tape TL431-AE2-R TL431K-AE2-R TL431G-AE2-R

SOT-23-3

K R A-----

Tape

SOT-23

Reel TL431-AE3-R TL431K-AE3-R TL431G-AE3-R

K R A-----

Reel

TL431NS-AE3-R TL431NSL-AE3-R TL431NSG-AE3-R R K A----- SOT-23 Tape

Reel

TL431NS-AE2-R TL431NSL-AE2-R TL431NSG-AE2-R R K A----- SOT-23-3 Tape

Tape

Reel

SOT-25

X X K R A--- TL431-AF5-R TL431K-AF5-R TL431G-AF5-R

K A A X X A A R SOP-8 Tape Reel TL431-S08-R TL431K-S08-R TL431G-S08-R

R A K----- TO-92 Tape

Box TL431-T92-B TL431K-T92-B TL431G-T92-B

R A K----- TO-92 Bulk TL431-T92-K TL431K-T92-K TL431G-T92-G

MARKING

431.

431N

431

BLOCK DIAGRAM

CATHODE (K)

ANODE(A) REFERENCE (R)

ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)

PARAMETER SYMBOL RATINGS UNIT

Cathode Voltage V KA 37 V Cathode Current Range(Continuous) I KA -100 ~ +150 mA Reference Input Current Range I REF -0.05 ~ +10 mA

TO-92 770 mW

SOT-89 800 mW

Power Dissipation SOT-23/SOT-23-3/SOT-25P D 300 mW

Operating Junction T J +150 °C Operating Ambient T OPR -40 ~ +85 °C Storage Temperature T STG -65 ~ +150 °C

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

RECOMMENDED OPERATING CONDITIONS

PARAMETER SYMBOL MIN TYP MAX UNIT

Cathode Voltage V KA V REF 36 V Cathode Current I KA 1 100 mA

ELECTRICAL CHARACTERISTICS (T C = 25°C, unless otherwise specified.)

TEST CIRCUIT

V KA

V KA =V REF ×(1+R 1/R 2)+I REF×R 1

For V KA =V REF

For V KA ≥V REF

For I KA(OFF)

APPLICATION CIRCUIT

V OUT =(1+R 1/R 2)×V REF V OUT =(1+R 1/R 2)×V REF

Minimum V OUT =V REF +5V V OUT =(1+R 1/R 2)×V REF

Shutdown Regulator

Output Control of a Three -Terminal Fixed Regulator

Higher-current Shunt Regulator

I OUT =V REF /R S I OUT =V REF /R CL

Constant-current Sink

Current Limiting or Current Source

■ TYPICAL CHARACTERISTICS

-11023

400

200

600

800

-2Cathode Voltage (V)

C a t h o d e C u r r e n t (μA

)

1

2

3

4

5

6

7

01234567

Time (μs)

I n p u t a n d O u t p u t V o l t a g e (V )

Pulse Response

C h a n

g e

I n R e f

e r

e

n c e I n p u t V o l t a g e (m V )

Change in Reference Input Voltage vs.

Cathode Current vs. Cathode Voltage

0510152025

303540

-1-1

Cathode Voltage (V)

-2

-1

1

2

3

-75-50-250255075100125Cathode Voltage (V)C a t h o d e C u r r e n t (m A )

Cathode Current vs. Cathode Voltage

150

-5-10-15-20-25-30-35-40

Frequency, f (Hz)

020

40

60Frequency Response

1K

10K

100K

1M

10M

10

3050-40-20

2550100125150750.8

1.6

2.4

3.0Temperature, ()

Deviation of Reference Voltage

相关文档