VISHAY
ZTK Series
Vishay Semiconductors
Voltage Stabilizers
Features
• Temperature-Compensated Stabilizing Circuits
• Monolithic linear integrated circuits with extremely
short thermal run-in time producing a constant
temperature-compensated voltage. They are par-
ticularly suitable for stabilizing the tuning voltage in
radio and TV tuners employing voltagevariable
capacitance diodes.
94 9367
Mechanical Data
Case:
DO-35 Glass Case
Weight:
approx. 0.13 g
Packaging codes/options:
TR/ 10K per 13 " reel (52 mm tape), 30 K/box
TAP/ 10K per Ammo tape, (52 mm tape), 30 K/box
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Operating Current (see Table
"Characteristics")
Junction temperature
Storage temperature range
T
J
T
S
150
- 20 to + 150
°C
°C
Test condition
Symbol
Value
Unit
Thermal Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Temperature Coefficient of the
operating voltage
Thermal Run-in-Time
Thermal resistance junction to
ambient air
1)
2)
Test condition
I
Z
= 5 mA ± 0.5 in the range of
T
amb
= 20 to 60 °C
Symbol
α
vz
t
th
T
θJA
Min
- 10
Typ.
-2
- 20
2)
Value
+ 5
1)
Unit
10
-5
/°C
s
400
°C/W
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case
At the end of this time
∆
V
Z
has reached 90 % of its final value
∆
V
Z
max.
∆V
Z
max = V
Z
(a) - V
Z
(0), where V
Z
(0) = V
Z
in the instant of
turn-on and V
Z
(a) = V
Z
at thermal equilibrium
Document Number 85812
Rev. 1.3, 27-Nov-03
www.vishay.com
1
ZTK Series
Vishay Semiconductors
Electrical Characteristics
Partnumber
Operating Voltage
V
Z
@ I
Z
= 5 mA
3)
V
ZTK6.8
ZTK9
ZTK11
ZTK18
ZTK22
ZTK27
ZTK33A
ZTK33B
ZTK33C
3)
4)
VISHAY
Dynamic resistance
r
zj
@ I
Z
= 5 mA
W
10(<25)
10(<25)
10(<25)
11(<25)
11(<25)
12(<25)
12(<25)
12(<25)
12(<25)
Permissable operating
I
Z
max @ T
amb
= 25 °C
4
Ω
36
27
1
13
1
8
7
7
7
6.4 to 7.1
8 to 10
10 to 12
16 to 20
20 to 24
24 to 30
30 to 32
32 to 34
34 to 36
Tested with pulses t
p
= 5 ms
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
18385
18387
Figure 1. Time dependence
Figure 3. Permissible operating current versus ambient
temperature
°
C
18386
18388
Figure 2. Dynamic resistance versus operating current
Figure 4. Change of temperature coefficient versus operating
current
www.vishay.com
2
Document Number 85812
Rev. 1.3, 27-Nov-03
ZTK Series
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of
Vishay Semiconductor GmbH
to
1. Meet all present and future national and international statutory requirements.
VISHAY
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH
has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH
can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
www.vishay.com
4
Document Number 85812
Rev. 1.3, 27-Nov-03
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