KA3842B/KA3843B/KA3844B/KA3845B
Electrical Characteristics
(V =15V, R =10KΩ, C =3.3nF, T = 0°C to +70°C, unless otherwise specified)
CC
T
T
A
Parameter
Symbol
Conditions
Min.
Typ. Max. Unit
REFERENCE SECTION
Reference Output Voltage
Line Regulation
V
T = 25°C, I
REF
= 1mA
4.90
5.00
6
5.10
20
V
REF
J
∆V
∆V
12V≤V ≤25V
CC
-
-
-
mV
mV
mA
REF
REF
SC
Load Regulation
1mA≤I
≤20mA
REF
6
25
Short Circuit Output Current
OSCILLATOR SECTION
Oscillation Frequency
I
T = 25°C
A
-100
-180
f
T = 25°C
J
47
-
52
0.05
1.6
57
1
KHz
%
Frequency Change with Voltage ∆f/∆V
CC
12V≤V ≤25V
CC
Oscillator Amplitude
ERROR AMPLIFIER SECTION
Input Bias Current
V
-
-
-
V
P-P
OSC
I
-
-
2.42
65
60
2
-0.1
2.50
90
-2
µA
V
BIAS
Input Voltage
V
V = 2.5V
1
2.58
I(E>A)
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
CURRENT SENSE SECTION
Gain
G
2V≤ V ≤4V
-
dB
dB
mA
mA
V
VO
O
PSRR
12V≤ V
≤25V
70
-
CC
I
V = 2.7V, V = 1.1V
7
-
-
SINK
2
1
I
V = 2.3V, V = 5V
-0.6
5
-1.0
6
SOURCE
2
1
V
V = 2.3V, R = 15KΩ to GND
-
OH
2
L
V
V = 2.7V, R = 15KΩ to Pin 8
-
0.8
1.1
V
OL
2
L
G
(Note 1 & 2)
2.85
3
1
3.15
1.1
-
V/V
V
V
Maximum Input Signal
Power Supply Rejection Ratio
Input Bias Current
V
V = 5V(Note 1)
1
0.9
I(MAX)
PSRR
12V≤ V
≤25V (Note 1)
-
-
70
-3
dB
µA
CC
I
-
-10
BIAS
OUTPUT SECTION
I
I
I
I
= 20mA
-
-
0.08
1.4
0.4
2.2
-
V
V
SINK
SINK
V
OL
Low Output Voltage
High Output Voltage
= 200mA
= 20mA
13
12
-
13.5
13.0
45
V
SOURCE
SOURCE
V
OH
= 200mA
-
V
Rise Time
Fall Time
t
T = 25°C, C = 1nF (Note 3)
150
150
ns
ns
R
J
L
t
T = 25°C, C = 1nF (Note 3)
-
35
F
J
L
UNDER-VOLTAGE LOCKOUT SECTION
KA3842B/KA3844B
KA3843B/KA3845B
KA3842B/KA3844B
KA3843B/KA3845B
14.5
7.8
16.0
8.4
17.5
9.0
V
V
V
V
Start Threshold
V
TH(ST)
8.5
10.0
7.6
11.5
8.2
Min. Operating Voltage
(After Turn On)
V
OPR(MIN)
7.0
3
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
