ULVH431

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 6

www.unisonic.com.tw

QW-R103-115.b



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

ULVH431-A 1.234

1.24

1.246

V

ULVH431-1

1.228

1.24

1.252

V

ULVH431-2

1.252

1.265

V

Reference Voltage

ULVH431-3

1.215

1.228

V

Temperature Range (Note 2)

(Note 1 and Figure 1)

11

31

mV

Cathode Voltage Change

KA

REF

V

∆

V

∆

-1.5

-2.7

mV/V

Reference Terminal Current

(see Figure 2)

0.1

0.5

µA

Temperature Range (Note 2)

(see Note 1 and Figure 2)

0.15

0.5

µA

Minimum Cathode Current for

Regulation

60

100

µA

Off-State Cathode Current

0.02

0.1

µA

Dynamic Impedance (Note 3)

(see Figure 1)

0.25

0.4

Ω

Notes: 1. Full temperature ranges are: -40°C~125°C for ULVH431.

minimum values obtained over the rated temperature range. The average full-range temperature

REF

V

α

(

)

C

°

ppm

=

A

6

A

REF

)

dev

(

REF

T

∆

10

×

)

)

C

°

25

=

T

(

V

V

(

occurs at the lower temperature.

3. The dynamic impedance is defined as:

K

KA

ka

I

∆

V

∆

=

z

When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of

the circuit is defined as:

)

2

R

1

R

+

1

(

×

z

≈

I

∆

V

∆

=

z

ka

ka