ZHT431 datasheet(2/9 Pages) DIODES

2 / 9 page

ZHT431

Document number: DS32157 Rev. 12 - 2

2 of 9

www.diodes.com

April 2018

ZHT431

Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated.)

Parameter

Rating

Unit

Cathode Voltage (VZ)

Cathode Current

150

Operating Temperature

-55 to +125

°C

Storage Temperature

-55 to +150

°C

Power Dissipation

(TA = +25°C, TJMAX = +150°C)

330

Recommended Operating Conditions

Parameter

Min

Max

Unit

Cathode Voltage VREF

—

Cathode Current

0.05

100

Electrical Characteristics (Test conditions unless otherwise specified: TA = +25°C.)

Symbol

VParameter

Values

Unit

Conditions

Min.

Typ.

Max.

VREF

Reference Voltage

0.5%

2.45

2.475

2.4875

2.50

2.55

2.525

2.5125

IL = 10mA (Fig.1),

VZ = VREF

VDEV

Deviation of Reference Input Voltage Over

Temperature

—

IL = 10mA, VZ = VREF

TA = Full Range (Fig.1)

ΔVREF

ΔVZ

Ratio of the Change in Reference Voltage to

the Change in Cathode Voltage

—

-1.85

-2.7

mV/V

VZ from VREF to 10V

IZ = 10mA (Fig.2)

—

-1.0

-2.0

mV/V

VZ from 10V to 20V

IZ = 10mA (Fig.2)

IREF

Reference Input Current

—

0.12

1.0

µA

R1 = 10k, R2 = O/C,

lL = 10mA (Fig.2)

ΔIREF

Deviation of Reference Input Current Over

Temperature

—

0.04

0.2

µA

R1 = 10k, R2 = O/C,

IL=10mA, TA = Full Range (Fig.2)

IZMIN

Minimum Cathode Current for Regulation

—

µA

VZ = VREF (Fig.1)

IZOFF

Off-state Current

—

0.1

µA

VZ = 20V, VREF = 0V (Fig.3)

Dynamic Output Impedance

—

0.75

VZ = VREF (Fig.1), f = 0Hz,

IC = 1mA to 100mA

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, RZ, is defined as:

When the device is programmed with two external resistors, R1 and R2,

(Fig.

2), the dynamic output impedance of the overall circuit, R’, is defined as:

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