AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP432/AP432A Rev. 6

5 of 12

MARCH 2007

www.diodes.com

Parameter

Test conditions

Symbol

Min.

Typ.

Max.

Unit

AP432

1.227

1.252

Reference Voltage

AP432A

1.233

1.24

1.246

V

Deviation of Reference Input Voltage over

Temperature (Note 8)

Ta = full range

(Fig.1)

3.0

20

mV

Ratio of the Change in Reference Voltage to

the Change in Cathode Voltage

(Fig.2)

KA

REF

V

V

∆

∆

-1.4

-2.0

mV/V

Reference Input Current

R1 = 10KΩ,R2 = ∞

1.4

3.5

µA

Deviation of Reference Input Current over

Temperature

R1 = 10KΩ,R2 = ∞

Ta = Full range (Fig.2)

0.4

1.2

µA

Minimum Cathode Current for Regulation

0.15

0.3

mA

Off-state Current

0.1

1.0

µA

Dynamic Output Impedance (Note 9)

Frequency

KA

Z

0.2

0.5

Ω

Temperature

range. The average temperature coefficient of the reference input voltage

1

2

6

REF

DEV

REF

T

T

10

)

C)

(25

V

V

(

V

−

⋅

°

=

α

……………………..……………….. (

)

C

ppm

°

Where:

T2 – T1 = full temperature change.

KA

KA

KA

I

V

Z

∆

∆

=

When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall

circuit, is defined as:

)

R2

R1

(1

Z

i

v

Z

KA

'

KA

+

∆

∆

=

≈