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ZHT431C02L

P1-P3P4-P6P7-P9P10-P11
Issue 7- July 2009 1 www.diodes.com
© Diodes Incorporated
A
Product Line o
f
Diodes Incorporated
ZHT431
Adjustable Precision Zener Shunt Regulator
Description
Ordering Information
The ZHT431 is a three terminal adjustable shunt
regulator offering excellent temperature stability
and output current handling capability up to
100mA. The device offers extended operating
temperature range working from -55 to +125°C.
The output voltage may be set to any chosen
voltage between 2.5 and 20 volts by selection of
two external divider resistors.
The devices can be used as a replacement for
zener diodes in many applications requiring an
improvement in zener performance.
Features
• Surface mount SOT223 and SOT23 packages
• 0.5%, 1% and 2% tolerance
• Maximum temperature coefficient 67 ppm/°C
• Temperature compensated for operation over
the full temperature range
• Programmable output voltage
• 50mA to 100mA current sink capability
• Low output noise
• Available in “Green” Molding Compound
(No Br, Sb) denoted by -7
• Wide temperature range -55 to +125°C
Applications
• Series and shunt regulator
• Voltage monitor
• Over voltage / under voltage protection
• Switch mode power supplies
Pinout Information
Order Reference Tolerance
(%)
Package Part mark Status Reel size
(inches)
Quantity
per reel
Tape
width
ZHT431C01L 1 TO92 ZHT43101 Obsolete Loose 4000 -
ZHT431C01STOB 1 TO92 ZHT43101 Obsolete 12.5 1500 -
ZHT431C01STZ 1 TO92 ZHT43101 Obsolete Concertina 1500 -
ZHT431C02L 2 TO92 ZHT43102 Obsolete Loose 4000 -
ZHT431C02STOB 2 TO92 ZHT43102 Obsolete 12.5 1500 -
ZHT431C02STZ 2 TO92 ZHT43102 Obsolete Concertina 1500 -
ZHT431F01TA 1 SOT23 43C Active 7 3000 8mm
ZHT431F01-7 1 SOT23 43C Active 7 3000 8mm
ZHT431FMTA 0.5 SOT23 43P Active 7 3000 8mm
ZHT431F02TA 2 SOT23 43D Active 7 3000 8mm
ZHT431G01TA 1 SOT223 ZHT43101 Active 7 1000 12mm
ZHT431G02TA 2 SOT223 ZHT43102 Active 7 1000 12mm
V
Z
GND
SOT223
Pinout - Top view
V
REF
GND
GND
V
REF
V
Z
SOT23
Pinout - Top view
ZHT431
Issue 7- July 2009 2 www.diodes.com
© Diodes Incorporated
Schematic Diagram
Absolute Maximum Rating
Cathode voltage (V
Z
)20V Power dissipation (T
amb
=25°C)
Cathode current 150mA (T
jmax
= 150°C)
Operating temperature -55 to 125°C SOT23 330mW
Storage temperature -55 to 150°C SOT223 2W
Recommended Operating Conditions
Min. Max.
Cathode voltage V
REF
20V
Cathode current 50µA 100mA
ZHT431
Issue 7- July 2009 3 www.diodes.com
© Diodes Incorporated
Electrical Characteristics Test Conditions (unless otherwise stated):T
amb
=25°C
Deviation of reference input voltage, V
DEV
, 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, V
REF
is defined as:
The dynamic output impedance, R
Z
, is defined as:
When the device is programmed with two externalresistors, R1 and R2,
(fig 2) , the dynamic outputimpedance of the overall circuit, R’, is
defined as:
Symbol Parameter Value Units Conditions
Min. Typ. Max.
V
REF
Reference voltage 2% 2.45 2.50 2.55 V I
L
=10mA (Fig.1),
V
Z
=V
REF
1% 2.475 2.50 2.525 V
0.5% 2.4875 2.50 2.5125 V
V
DEV
Deviation of reference input
voltage over temperature
10 30 mV I
L
=10mA, V
Z
=V
REF
T
amb
=full range (Fig1)
Ratio of the change in
reference voltage to the
change in cathode voltage
-1.85 -2.7 mV/V V
Z
from V
REF
to 10V
I
Z
=10mA (Fig.2)
-1.0 -2.0 mv/V V
Z
from 10V to 20V
I
Z
=10mA (Fig.2)
I
REF
Reference input current 0.12 1.0 mA R1=10k, R2=O/C,
l
L
=10mA (Fig.2)
DI
REF
Deviation of reference input
current over temperature
0.04 0.2 mA R1=10k, R2=O/C,
I
L
=10mA T
amb
=full range
(Fig.2)
I
Zmin
Minimum cathode current for
regulation
35 50 mA V
Z
=V
REF
(Fig.1)
I
Zoff
Off-state current 0.1 mA V
Z
=20V, V
REF
=0V(Fig.3)
R
Z
Dynamic output impedance 0.75 V V
Z
=V
REF
(Fig.1), f=0Hz,
I
C
=1mA to 100mA
ΔV
REF
ΔV
Z
-----------------
V
max
V
min
T1 T2
V
dev
=V
max
-V
min
Temperature
V
REF
ppm
°C
-----------
⎠
⎞
⎝
⎛
V
DEV
x1000000
V
REF
T1 T2–()
--------------------------------------
=
R′ R
Z
1
R1
R2
-------+()=
P1-P3P4-P6P7-P9P10-P11

ZHT431C02L

Mfr. #:
Buy ZHT431C02L
Manufacturer:
Diodes Incorporated
Description:
Voltage References High Temp 431 Prog
Lifecycle:
New from this manufacturer.
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