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KA33V
Voltage Stabilizer
Features
* Low Temperature Coefficient * Low Dynamic Resistance * Typical Reference Voltage of 33V
Description
The KA33V is a monolithic integrated voltage stabilizer especially designed as voltage supplier for electronic tuners.
TO-92
1
1. Anode 2. Cathode
Schematic Diagram
2 C a th o d e R4
D1 D2 D3 D4 D5
Q3 R3

Q2
R2
R1 1 Anode
Rev. 1.0.1
(c)2001 Fairchild Semiconductor Corporation
KA33V
Absolute Maximum Ratings (TA= 25C)
Parameter Zener Current Power Dissipation (TA = 75C) Operating Ambient Temperature Range Storage Temperature Range Symbol IZ PD TOPR TSTG Value 10 200 -20 ~ 75 -40 ~ 125 Unit mA mW C C
Electrical Characteristics (TA = 25C)
Parameter Stabilized Voltage Stabilized Voltage-Temperature Drift Dynamic Resistance Symbol VZ VZ/T RZ Conditions IZ = 5mA IZ = 5mA TA = -20 to 75C IZ = 5mA, f = 1KHz Min. 31 -1 0 10 Typ. Max. 35 1 25 Unit V mV/C -
2
KA33V
Measuring Circuits
IZ = 5mA A
RB
2
KA33V
EB 1
v
Volt Meter
Figure 1. Measuring Circuit for Stabilized Voltage VZ
Iz A

+ 50 F
IAC =
Iz 10
100
RB 2 VV2
C 0.1 F
KA33V
VV1
~
f = 1KHz
EB
1
Fig. 3 IZ
Vz
rZ =
VV1 1 0.5mA
0 5mA
0.5mA
5mA
W1
Figure 2. Measuring Circuit for Dynamic Resistance
3
KA33V
Typical Application
Ach

Bch
Ych
Zch
Ri 2 C C hannel s e ttin g v a r ia b l e r e s is t o r 15K 15K 15K
KA33V
Vi
1
c

c
t o t u n in g d io d e s ( v a r a c t o r ) in c a s e o f Y c h o n
1) UHF Tuner

TR1
D5 A n te n n a
TR2
D1
D2

D3
D4
TR 1 : R F A M P : K SC 1393 K S C 1 0 7 0 ( U n d e r d e v e lo p m e n t) TR 2 : O SC : S KC 1730 D 1 - D 4 : 1 S 2 2 0 D 5 : M IX E R : 1 S S 1 6
AFC te r m in a l
2) VHF Tuner

TR 1
TR 3
TR 1 : R M AM P : KSC 1393 T R 2 : M IX E R TR3 : OSC : K S C 1 39 4 : KSC 1730
L o w /H ig h C h a n n e l S w itc h in g te rm in a l. A F C te rm in a l
D 1, D 4 : 1S 2209 D 2, D 3 : 1S 2207
A n te n n a
D1
D2
D3
D4
TR 2

4
KA33V
Power-temperature Derating Durve Typical Characteristic Curves
(TA = 25C)
Figure7. Allowable Dissipation vs. Amblent Temperature
Figure8. Dynamic Resistance vs. Zener Current
Figure9. Stabilized Voltage Temperature Drift vs. Zener Current
Figure10. Stabilized Voliage Variation vs. Time
Figure11. Stabilized Voltage Variation & Supply Voltage Variation vs. Zener Current
5
KA33V
Mechanical Dimensions
Package Dimensions in millimeters
TO-92
6
KA33V
Ordering Information
Product Number KA33V Package TO-92 Operating Temperature
7
KA33V
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 9/25/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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