UNISONIC TECHNOLOGIES CO TL431A Technical data

UTC TL431A LINEAR INTEGRATED CIRCUIT

PROGRAMMABLE PRECISION
REFERENCE

DESCRIPTION

The UTC TL431A 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 Vref(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 0.2Ω.

*Sink current capability of 1 to 100mA.
*Equivalent full-range temperature coefficient of 50ppm/ °C
typical for operation over full rated operating temperature
range.

BLOCK DIAGRAM

CATHODE

REFERENCE

1

1

SOT-89

2

1

3

SOT-23

SOP-8 1: Cathode 2,3,6,7: Anode 8: Ref.

4,5: N.C.
TO-92 1: Ref ; 2: Anode; 3: Cathode
SOT-89 1: Ref ; 2: Anode; 3: Cathode
SOT-23 1: Cathode; 2: Ref; 3: Anode

*Pb-free plating product number: TL431AK

REFERENCE

(R)

TO-92

SOP-8

CATHODE

(K)

2.5V Vref

ANODE

ANODE(A)

UTC UNISONIC TECHNOLOGIES CO., LTD. 1

QW-R103-007,D

UTC TL431A LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL VALUE UNIT

Cathode Voltage VKA 37 V
Cathode Current Range(Continuous) IKA -100 ~ +150 mA
Reference Input Current Range Iref -0.05 ~ +10 mA
Operating Junction Temperature Tj 150 °C
Operating Ambient Temperature Topr -40 ~ +85 °C
Storage Temperature Temperature Tstg -65 ~ +150 °C

RECOMMENDED OPERATING CONDITIONS

PARAMETER SYMBOL MIN TYP MAX UNIT

Cathode Voltage VKA VREF 36 V
Cathode Current IKA 1 100 mA

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

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Reference Input Voltage Vref VKA=VREF,IKA=10mA

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 Iref IKA=10mA,R1=10kΩ, R2=∞ 1.5 4 µA
Deviation of Reference Input Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
Off-State Cathode Current IKA(OFF) VKA=36V,VREF=0 0.05 1.0 µA
Dynamic Impedance ZKA VKA=VREF, IKA=1 to 100mA

Note:TMIN=0°C,TMAX=+70°C

(Operating temperature range applies unless otherwise specified))

∆Vref/∆T VKA=VREF,IKA=10mA

∆Vref /∆VKA IKA=10mA

∆Iref/∆T IKA=10mA,R1=10kΩ, R2=∞

IKA(min) VKA=VREF

TMIN<=TA<=TMAX

∆VKA=10V~VREF
∆VKA=36V~10V

TA=full Temperature

f≤1.0kHz

2.483 2.495 2.507 V

4.5 17 mV

-1.0

0.4 1.2 µA

0.45 1.0 mA

0.15 0.5 Ω

-0.5

-2.7

-2.0

mV/V

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R103-007,D