ULVH431G-AE3-R datasheet(4/6 Pages) UTC

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ULVH431

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 6

www.unisonic.com.tw

QW-R103-115.b



ELECTRICAL CHARACTERISTICS (TA=25°C free-air temperature, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

ULVH431-A 1.234

1.24

1.246

ULVH431-1

1.228

1.24

1.252

ULVH431-2

1.252

1.265

Reference Voltage

VREF

VKA=VREF,

IK=10mA

TA=25°C

ULVH431-3

1.215

1.228

VREF Deviation Over Full

Temperature Range (Note 2)

VREF(dev)

VKA=VREF, IK=10mA

(Note 1 and Figure 1)

Ratio of VREF Change to

Cathode Voltage Change

REF

∆

IK=10mA (see Figure 2), VKA=VREF~18V

-1.5

-2.7

mV/V

Reference Terminal Current

Iref

IK=10mA, R1=10kΩ, R2=OPEN

(see Figure 2)

0.1

0.5

µA

Iref Deviation Over Full

Temperature Range (Note 2)

Iref(dev)

IK=10mA, R1=10kΩ, R2=Open

(see Note 1 and Figure 2)

0.15

0.5

µA

Minimum Cathode Current for

Regulation

IK(min)

VKA=VREF (see Figure 1)

100

µA

Off-State Cathode Current

IK(off)

VREF=0, VKA=18V (see Figure 3)

0.02

0.1

µA

Dynamic Impedance (Note 3)

|zKA|

VKA=VREF, f≤1kHz, IK=0.1mA~50mA

(see Figure 1)

0.25

0.4

Ω

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

2. The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and

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

coefficient of the reference input voltage, αVREF, is defined as:

REF

(

)

ppm

REF

)

dev

(

REF

∆

)

(

where ∆TA is the rated operating free-air temperature range of the device.

αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively,

occurs at the lower temperature.

3. The dynamic impedance is defined as:

∆

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

the circuit is defined as:

)

(

≈

∆

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