Calogic TL431D, TL431S, TL431LP Datasheet

CORPORATION

Precision Adjustable

Shunt Reference

TL431

FEATURES

•• Trimmed 1% Bandgap Reference

•• Nominal Temperat ur e Range Extended to 105

•• Temperature-Compensated: 30ppm/

o

C

•• Internal Amplifier w it h 150mA C a pability

•• Low Output Noise

•• Low Frequency Dynam ic Output Imp edan ce

PIN CONFIGU R ATI O N (Top View)

TO-92 (LP)

CATHODE

ANODE

CATHODE

ANODE

ANODE

DESCRIPTION

o

C

The TL431 is an adjustable shunt regulator designed to ac t as
an open-loop error amplifier with a 2.5V temperature
compensated reference. Its highly accurate 1% bandgap
reference is perfect for applications requiring stability and
accuracy over temp er atur e and life.

Sharp turn-on cha racteristics and a low temperature coefficient
make the TL431 an excellent replacement for many zener
diode applications, programmable to any value greater than

2.5V and up to 36V by using two external resistors. As a
combination error amplifier and reference, it can be used to
manage control loops such as sw itchin g power sup plies.

ORDERING INFORMATION
Part Package Temperature Range

o

TL431LP TO-92 0 to 105
TL431D 8-Pin Plastc SOIC 0 to 105
TL431S SOT-89 0 to 105

SOIC (D)

1

2

3

8

REFERENCE

7

ANODE

6

ANODE

SOT-89 (S)

CATHODE

ANODE

C

o

C

o

C

REFERENCE

1G-33

N/C

4

5

N/C

1G-34

REFERENCE

1G-35

CALOG IC CORPOR AT ION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

TL431

CORPORATION

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNITS

V

KA

I

AK

I

KA

I

REF

P

D

T

J

T

STG

T

L

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permane nt damag e to the device. This is a stress r ating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification
is not implied. Exposure to ab solut e ma ximu m rati ng conditi on s for ext ende d peri od s may affe ct reliab ili ty.

RECOMMENDED CONDITIONS

SYMBOL P ARAMETER RATING UNIT

V

KA

I

K

Cathode-Anode Reverse Breakdown 37 V
Anode-Cathode Forward Current 1 A
Operating Cathode Current 250 mA
Reference Inp ut Current 10 mA
Continuou s Power at 25oC

TO-92
8L SOIC
SOT-89

775
750

1000
Junction Temperature 150
Storage Temperature –65 to 150
Lead Temperature, Soldering 10 Seconds 300

TYPICAL THERMAL RESISTANCE

Cathode Voltage V

to 20 V

REF

Cathode Current 10 mA

PACKAGE θ

TO-92 160
SOIC 175
SOT-89 110

JA

o

C/W 80oC/W 6.3mW/oC

o

C/W 45oC/W 5.7mW/oC

o

C/W 8oC/W 9.1mW/oC

θ

JC

mW
mW
mW

o

C

o

C

o

C

TYPICAL DERATING

FUNCTIONAL BLOCK DIAGRAM

CATHODE (K)

REFERENCE (R)

+
–

2.5V

ANODE (A)

1G-36

CALOG IC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, T elephone: 510-656-2900, FAX: [phone]