NTE1531
Integrated Circuit
Voltage Regulator for Electronic Tuning System
Description:
The NTE1531 is a voltage regulator for use with a varactor tuner or electronic tuning control.
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Maximum Input Voltage (+B
1
, +B
2
, CLK), V
B1
, V
B2
, V
CLK
max
21V
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation, P
D
max
1W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opg
20
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operation Conditions: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Min
Typ
Max
Unit
V
ref
Output Current
I
ref
10
0
mA
V
DD
Output Current
I
DD
30
0
mA
INHI Output Current
I
INHI
0.5
0
mA
BUC Output Current
I
BUC
0.8
0
mA
+B
1
, +B
2
Input Voltage
V
B1
, V
B2
9
16
V
Operational Characteristics: (T
A
= +25
C, unless otherwise specified)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
V
DD
Voltage
V
DD(1)
+B1 = +B2 = 9V, I
DD
= 30mA,
I
ref
= 10mA, V
ref
= 8V,
T
A
= 20
to +70
C
V
ref
0.3
8.5
V
V
DD(2)
+B
1
= +B
2
= 16V, I
DD
= 30mA,
I
ref
= 10mA, V
ref
= 8V,
T
A
= 20
to +70
C
V
ref
0.3
10
V
V
DD
Voltage
(At BackUp Time)
V
DD(3)
+B
2
= 9 to 16V, I
DD
= 4mA,
+B
1
opened.
4.5
5.5
V
V
DD
Voltage
V
DD(4)
V
CLK
= +B
2
= 9V, I
DD
= 18mA,
I
ref
= 10mA, V
ref
= 8V,
T
A
= 20
to +70
C, +B
1
opened.
V
ref
0.3
8.5
V
Operational Characteristics (Cont'd): (T
A
= +25
C, unless otherwise specified)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
V
DD
Voltage
V
DD(5)
V
CLK
= +B
2
= 16V, I
DD
= 18mA, I
ref
= 10mA, V
ref
= 8V,
T
A
= 20
to +70
C, +B
1
opened.
V
ref
0.3
10
V
Radio BackUp
Signal Voltage
V
BUC
+B
1
= +B
2
= 9.15 to 16V, V
ref
= 8V 0.78V
DD
V
DD
V
Clock BackUp
Signal Voltage
V
INHI
+B
1
= +B
2
= 9.15 to 16V, V
ref
= 8V 0.78V
DD
V
DD
V
Radio BackUp Signal
Rise Voltage
V
TH BUC UP
+B
1
= +B
2
, V
ref
= 8V, I
ref
= 10mA
8.9
9.3
V
Radio BackUp Signal
Hysteresis
V
TH BUC DN
+B
1
= +B
2
, V
ref
= 8V, I
ref
= 10mA
50
200
mV
BUC Delay Time
at +B Step Input
t
D
+B
1
= +B
2
= 13.2V,
C = 22
F, R = 22k ohm
85
400
ms
Current Dissipation
I
CC(1)
+B
1
= +B
2
= 13.2V,
I
DD
= 30mA, I
ref
= 10mA
70
mA
I
CC(2)
+B
2
= 13.2V, no load, +B
1
opened.
0.63
1.4
mA
V
ref
Thermal Drift
|
V
ref
|
T
A
= 10 to +60
C,
V
ref
= 8V (25
C)
60
0
60
mV
Logic Table:
B1
B2
CLK
V
DD
V
ref
BUC
INHI
Condition
L
H
L
5V
0V
L
L
When backup of time
H
H
L
9V
8V
H
H
radio on
L
H
H
9V
8V
L
H
read out time when radio off
H
H
H
9V
8V
H
H
read out time when radio on
NOTE: This device is for REPLACEMENT ONLY! No application notes are available.
Block Diagram
Control LSI
Control Signal
Generator
Counter IC
Control Signal
Generator
Logic
Circuit
Comparator
V
DD
Generator
for BackUp
Time
Delay
V
DD
Generator
V
ref
Generator
Reference
Voltage
Generator
Comparator
14
13
12
1
4
2
3
10
N.C.
V
ref
V
DD
C2
V1
Det
C3
C1
GND
B
2
CLK
B
1
INHI
BUC
9
8
5
11
6
7
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