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ZHT431C01 Datasheet(PDF) 2 Page - Zetex Semiconductors

Part # ZHT431C01
Description  ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
PDF  7 Pages
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Manufacturer  ZETEX [Zetex Semiconductors]
Direct Link  http://www.diodes.com/
Logo ZETEX - Zetex Semiconductors

ZHT431C01 Datasheet(HTML) 2 Page - Zetex Semiconductors

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ZHT431
ABSOLUTE MAXIMUM RATING
Cathode Voltage (VZ)
20V
Cathode Current
150mA
Operating Temperature
-55 to 125°C
Storage Temperature
-55 to 150°C
Recommended Operating Conditions
Min
Max
Cathode Voltage
Vref
20V
Cathode Current
50
µA 100mA
Power Dissipation (Tamb=25°C)
(Tjmax = 150°C)
SOT23
330mW
TO92
780mW
SOT223
2W
SO8
780mW
SOT89
1.5W
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tamb=25°C
PARAMETER
SYMBOL
VALUE
UNITS CONDITIONS
MIN
TYP MAX
Reference Voltage
2%
1%
Vref
2.45
2.475
2.50
2.50
2.55
2.525
VIL=10mA (Fig1), VZ=Vref
Deviation of Reference Input
Voltage over Temperature
Vdev
10
30
mV
IL=10mA, VZ=Vref
Ta=full range (Fig1)
Ratio of the change in
Reference Voltage to the
Change in Cathode
Voltage
∆Vref
∆V
Z
-1.85 -2.7
mV/V
VZ from Vref to 10V
IZ=10mA (Fig2)
-1.0
-2.0
mV/V
VZ from 10V to 20V
IZ=10mA (Fig2)
Reference Input Current
Iref
0.12 1.0
µA
R1=10k, R2=O/C, lL=10mA
(Fig2)
Deviation of Reference Input
Current over Temperature
∆I
ref
0.04 0.2
µA
R1=10k, R2=O/C, IL=10mA
Ta=full range (Fig2)
Minimum Cathode
Current for Regulation
IZmin
35
50
µA
VZ=Vref (Fig1)
Off-state Current
IZoff
0.1
µA
VZ=20V, Vref=0V(Fig3) †
Dynamic Output
Impedance
RZ
0.75
Ω
VZ=Vref (Fig1), 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:
Vref
(ppm
⁄ °C)=
Vdev x 1000000
Vref
(T1−T2)
The dynamic output impedance, Rz, is defined as:
RZ
=
∆VZ
∆IZ
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:
R’
=Rz (1+
R1
R2
)
Vmax
Vmin
T1
T2
Vdev = Vmax - Vmin
Temperature
4-29



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