ZTLV431BFFTA datasheet(3/8 Pages) ZETEX

Part #	ZTLV431BFFTA

Description	1.24V Cost effective shunt regulator

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Manufacturer	ZETEX [Zetex Semiconductors]

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ZTLV431

Issue 4 - April 2007

3

www.zetex.com

Electrical characteristics (electrical characteristics over recommended operating

conditions, TA = 25°C, KKA = VREF, IKA = 10mA unless otherwise stated)

Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference

input voltage over the full temperature range.

The average temperature coefficient of the reference input voltage, VREF is defined as:

The dynamic output impedance, ZKA, is defined as:

When the device is programmed with two externalresistors, R1

and R2, (fig 2) , the dynamic output impedance of the overall

circuit, Z’, is defined as:

Symbol

Parameter

Conditions

Min.

Typ.

Max. Units

VREF

Reference voltage

ZTLV431A

1.228

1.24

1.252

V

ZTLV431B

1.234

1.24

1.246

TA = -40 to 85°C

ZTLV431A

1.215

1.265

ZTLV431B

1.224

1.259

TA = -40 to 125°C

ZTLV431A

1.209

1.271

ZTLV431B

1.221

1.265

VREF(dev)

Deviation of reference

voltage over full

temperature range

TA = 0 to 70°C

4

12

mV

TA = -40 to 85°C

6

20

TA = -40 to 125°C

11

31

Ratio of change in

reference voltage to

the change in cathode

voltage

VKA from VREF to

IKA = 10mA

6V

-1.5

-2.7

mV/V

10V

-1.5

-2.7

IREF

Reference input current

IKA = 10mA, R1 = 10k ., R2 = OC

0.1

0.5

µA

IREF(dev)

IREF deviation over full

temperature range

IKA = 10mA,

R1 = 10k ,

R2 = OC

TA = 0 to 70°C

0.05

0.3

µA

TA = -40 to 85°C

0.1

0.4

TA = -40 to 125°C

0.15

0.5

IKMIN

Minimum cathode

current for regulation

VKA = VREF

TA = -40 to 125°C

55

100

µA

IK(OFF)

Off-state current

VKA = 10V, VREF =0V

10

30

µA

zKA

Dynamic output

impedance

VKA = VREF, f = <1kHz,

IK = 0.1 to 15mA

0.25

0.4

ΔV

REF

ΔV

KA

-----------------

Vmax

Vmin

T1

T2

Vdev =Vmax -Vmin

Temperature

V

REF

ppm

°C

-------------⎠

⎞

⎝

⎛

V

DEV x 1000000

V

REF T

1

T

2

–

()

------------------------------------------

=

Z

KA

ΔV

K

ΔI

K

----------

=

Z

′

Z

KA x 1

R1

R2

-------

+

()

=

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