DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ
PC574
MONOLITHIC BIPOLAR INTEGRATED CIRCUIT
VOLTAGE STABILIZER FOR ELECTRONIC TUNER
The
µ
PC574 is a monolithic integrated voltage stabilizer especially designed as voltage supplier for electronic
tuners.
FEATURES
• Low temperature coefficient
• Low dynamic resistance
• Typical reference voltage of 33 V
EQUIVALENT CIRCUIT
2
R
4
PIN CONFIGURATION (Marking Side)
µ
PC574J: 2-pin plastic SIP (TO-92)
D
1
D
2
D
3
D
4
D
5
Q
3
R
3
Q
2
Q
1
R
2
R
1
1
1
1. Anode
2. Cathode
2
ORDERING INFORMATION
Part Number
Package
2-pin plastic SIP (TO-92)
µ
PC574J
The information in this document is subject to change without notice.
Document No. S13200EJ4V0DS00 (4th edition)
(Previous No. IC-1006)
Date Published January 1998 N CP(K)
Printed in Japan
The mark
shows major revised points.
©
1998
µ
PC574
ABSOLUTE MAXIMUM RATINGS (T
A
= 25
°
C, unless otherwise specified.)
Parameter
Zener Current
Power Dissipation
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
I
Z
P
D
T
A
T
stg
Ratings
10
200 (T
A
= 75°C)
–20 to +75
–40 to +125
Unit
mA
mW
°C
°C
Caution Exposure to Absolute Maximum Ratings for extended periods may affect device reliability;
exceeding the ratings could cause permanent damage. The parameters apply independently. The
device should be operated within the limits specified under DC and AC Characteristics.
ELECTRICAL CHARACTERISTICS (T
A
= 25
°
C, unless otherwise specified.)
Parameter
Stabilized Voltage
Stabilized Voltage Temperature
Drift
Dynamic Resistance
Symbol
V
Z
I
Z
= 5 mA
I
Z
= 5 mA, T
A
= –20 to +75°C
Conditions
MIN.
31
–1.0
0
TYP.
MAX.
35
+1.0
Unit
V
mV/°C
Ω
∆
V
Z
/
∆
T
r
Z
I
Z
= 5 mA, f = 1 kHz, I
AC
= 0.5 mA
10
25
2
µ
PC574
TYPICAL CHARACTERISTIC (T
A
= 25
°
C, unless otherwise specified.)
Power Dissipation vs.
Ambient Temperature
80
60
Dynamic Resistance vs.
Zener Current
Free Air
P
D
- Power Dissipation - mW
400
r
Z
- Dynamic Resistance -
Ω
40
I
AC
=
I
Z
10
f = 1 kHz
300
20
200
10
8
6
4
100
2
–20
0
25
50
75
T
A
- Operating Ambient Temperature - °C
0
2
4
6
8
I
Z
- Zener Current - mA
10
∆
V
Z
/
∆
T - Stabilized Voltage Temperature Drift - mV/°C
Stabilized Voltage Temperature
Drift vs. Zener Current
Stabilized Voltage Variation
vs. Time
+4
+3
+2
+1
0
–1
–2
–3
–4
0
2
4
6
8
I
Z
- Zener Current - mA
10
∆
V
Z
- Stabilized Voltage Variation - mV
+80
+60
+40
+20
0
–20
–40
–60
–80
0
5
10 15 20304050 1
s.
t - Time
5
10 20 30
min.
I
Z
= 5 mA XY – Recoder Free Air
I
Z
= 5 mA
+–
V
Z
= 33.11 V
V
REF
(
∆
V
Z
/V
Z
)
×
100 - Stabilized Voltage Variation - %
Stabilized Voltage Variation &
Supply Voltage Variation vs.
Zener Current
+1.0
+0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
2
=
1
10
+0.4
V
B
V
574J
V
Z
k
Ω
2
R
S
+0.6
=2
R
S
A
I
Z
+30
+20
+10
0
–10
∆
V
Z
= V
Z
(I
Z
) – V
Z
(5)
–20
T
A
= –20 °C
T
A
= +25 °C
–30
T
A
= +75 °C
4
6
8
I
Z
- Zener Current - mA
10
∆
V
B
- Supply Voltage Variation - V
+0.8
R
S
0k
Ω
Reference I
Z
= 5 mA
3
µ
PC574
MEASURING CIRCUITS
(i) Measuring Circuit for Stabilized Voltage V
Z
I
Z
= 5 mA
A
2
R
B
µ
PC574
E
B
1
V
Digital Volt Meter
(ii) Measuring Circuit for Dynamic Resistance r
Z
I
Z
10
I
Z
A
2
C
0.1
µ
F
E
B
1
+
50
µ
F
R
B
I
AC
=
100
Ω
VV
2
VV
1
µ
PC574
f = 1 kHz
V
Z
I
Z
0.5 mA
5 mA
r
Z
=
VV
1
0.5 mA
VV
1
4
µ
PC574
TYPICAL APPLICATION
R
i
Ach
Bch
Ych
Zch
2
V
i
µ
PC574
1
C
15 kΩ
15 kΩ
15 kΩ
15 kΩ
Channel setting
Variable resistor
to tuning diodes (VARACTOR)
in case of Ych ON
5
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