©2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Low Temperature Co efficient
• Low Dynamic Resistance
• Typic a l Ref ere n c e Voltage of 33V
Description
The KA33V is a monolithic integrated voltage stabilizer
especially designed as voltage supplier for electronic tuners.
Schematic Diagram
R4
D1
D2
D3
D4
D5
Q3
Q2
R3
R2 R1
2 Cathode
1 Anode
●●●
●
●
●
KA33V
Voltage Stabilizer
TO-92
1. Anode 2. Cath ode
1
KA33V
2
Absolute Maximum Ratings (TA= 25°
°°
°C)
Electrical Characteristics (TA = 25°
°°
°C)
Parameter Symbol Value Unit
Zener Current IZ10 mA
Power Dissipation (TA = 75°C) PD200 mW
Operating Ambient Temperature Range TOPR -20 ~ 75 °C
Storage Temperature Range TSTG -40 ~ 125 °C
Parameter Symbol Conditions Min. Typ. Max. Unit
Stabilized Voltage VZIZ = 5mA 31 35 V
Stabilized Voltage-Temperature Drift ∆VZ/∆TIZ = 5mA
TA = -20 to 75°C-1 0 1 mV/°C
Dynamic Resistance RZIZ = 5mA, f = 1KHz - 10 25 -
KA33V
3
Mea suring Circui t s
Figure 1. Measuring Circuit for Stabilized Voltage VZ
Figure 2. Measuring Circu it for Dynami c Resis tance
KA33V v
RB
EB
1
Volt Meter
A
2
IZ = 5mA
●
●● ●●
●
A
KA33V
●
●
EB
0.1μFC
2
1
VV1
VV2
~
50μF 100
f = 1KHz
+
RB
Iz IAC = Iz
10
05mA
rZ = VV1
0.5mA 5mA
Vz
IZ
Fig. 3
0.5mA
1
W1
KA33V
4
Typical Application
1) UHF Tune r
2) VHF Tuner
KA33V
15KΩ15KΩ15KΩ
Vi
c
Ri ●
●
●
●
●
●●●
●●
2
1
C
c
Ach Bch Ych Zch
Channel
setting
variable
resistor
＊ to tuning diodes (varactor) in case of Ych on
Antenna
D1
TR1
D2 D3
D5
D4
TR2
TR1 : RF AMP: KSC1393
K S C1 0 7 0 (Un d e r d e velop me n t)
TR2 : OSC: SKC1730
D 1 - D4 : 1S 220 D5: M IXE R: 1SS16
●
●
●
●
●●
●
●
●
●
●
●
●
●
●
AFC
terminal
Antenna
D1
TR1
D2 D3 D4
TR3
●
●
●
●
●●
●
●
●
●
●
●
●
●
●
TR2
TR1 : RM AMP : KSC1393
T R2 : MIX ER : K S C1 3 9 4
T R3 : OS C : KS C1 73 0
D1, D4 : 1S2209
D2, D3 : 1S2207
AFC term inal
Low /High Ch annel
S wit c hin g te r mina l.
KA33V
5
Power-temperature Derating Durve Typical Characteristic Curves
(TA = 25°C)
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
KA33V
6
Mechanical Dimensions
Package Dimensions in millimeters
TO-92
KA33V
7
Ordering Information
Product Number Package Operating Temperature
KA33V TO-92
KA33V
9/25/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semicond uctor Corporation
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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.
2. A critical component in any component of a life support
device or syst em who se failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effec tiv ene ss.
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