AX431CA datasheet(2/7 Pages) ETC

Part #	AX431CA

Description	Adjustable Shunt Regulator

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Page No. : 2/7

AVANTICS - AX431 Series

Specification No.: 050308-FE0001

Functional Block Diagram & Symbol

Test Circuits

Electrical Characteristics (T

A=25

oC unless otherwise specified)

Characteristics

Symbol

Test Conditions

Min

Typ

Max

Unit

AX431AN/AM/AA/AS

2.445

2.495

2.545

AX431BN/BM/BA/BS

2.470

2.495

2.520

Reference Input

Voltage (Fig1)

AX431CN/CM/CA/CS

V

REF

V

K=VREF, IK=10mA

2.483

2.495

2.507

V

Deviation of Reference Input Voltage Over-

Temperature (Fig1)

V

REF(dev)

V

K=VREF, IK=10mA

T

min

≤Ta≤Tmax

-4

17

mV

I

K=10mA,

∆VK=10V to VREF

-

-1.4

-2.7

mV/V

Ratio of Change in Reference Input Voltage

to the Change in Cathode Voltage (Fig2)

∆VREF /

∆VK

I

K=10mA,

∆VK=36V to 10V

-

-1.0

-2.0

mV/V

Reference Input Current (Fig2)

I

REF

I

K=10mA, R1=10k

Ω,

R

2=

∞

-2

4

uA

Deviation of Reference Input Current Over

Full Temperature Range (Fig2)

I

REF(dev)

I

K=10mA, R1=10k

Ω,

R

2=

∞, Ta=Full Range

-0.4

1.2

uA

Minimum Cathode Current for Regulation (Fig1)

I

K(min)

V

K=VREF

-0.4

1.0

mA

Off-State Cathode Current (Fig3)

I

K(off)

V

K=36V, VREF=0

-

0.1

1.0

uA

Dynamic Output Impedance (Fig1)

Z

K

V

K=VREF, f

≤1kHz

I

K=1 to 100mA

-0.2

0.5

Ω

Functional Block Diagram

Symbol

Fig 1. V

K=VREF

Fig 2. V

K>VREF

Fig 3. Off-State Current

Reference

Anode

Cathode

IN

V

K

I

REF

V

REF

I

K

R

1

I

V

K

IN

I

REF

I

K

R

2

V

REF

Note: VK=VREF(1+R1/R2)+IREFxR1

IN

V

K

I

OFF

+

-

V

Anode

Reference

Cathode

REF

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