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ZHT431 Datasheet(PDF) 2 Page - Diodes Incorporated

Part # ZHT431
Description  ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
PDF  8 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZHT431 Datasheet(HTML) 2 Page - Diodes Incorporated

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ZHT431
ZHT431
Document number: DS32157 Rev. 11 - 2
2 of 8
www.diodes.com
November 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)
Parameter
Rating
Unit
Cathode Voltage (VZ)
20
V
Cathode Current
150
mA
Operating Temperature
-55 to 125
°C
Storage Temperature
-55 to 150
°C
Power Dissipation
(Tamb = 25°C, TJMAX = 150°C)
330
mW
Recommended Operating Conditions
Parameter
Min
Max
Units
Cathode Voltage VREF
-
20
V
Cathode Current
0.05
100
mA
Electrical Characteristics (Test conditions unless otherwise specified: Tamb = 25°C)
Symbol
Parameter
Values
Units
Conditions
Min.
Typ.
Max.
VREF
Reference Voltage
2%
1%
0.5%
2.45
2.475
2.4875
2.50
2.50
2.50
2.55
2.525
2.5125
V
IL=10mA (Fig.1),
VZ=VREF
VDEV
Deviation of reference input voltage
over temperature
10
30
mV
IL=10mA, VZ=VREF
Tamb=full range (Fig1)
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.
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 Tamb=full range
(Fig.2)
IZmin
Minimum cathode current for regulation
35
50
µA
VZ=VREF (Fig.1)
IZoff
Off-state current
0.1
µA
VZ=20V, VREF=0V(Fig.3)
RZ
Dynamic output impedance
0.75
V
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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