CS2844/3845 SERIES
Electrical Characteristics: -25
≤
T
A
≤
85˚C for CS2844/2845, 0
≤T
A
≤
70˚C for CS3844/3845. V
CC
= 15V (Note 1); R
T
= 10kΩ,
C
T
= 3.3nF for sawtooth mode., unless otherwise stated.
CS2844/CS2845
MIN TYP MAX
CS3844/CS3845
MIN TYP MAX UNITS
PARAMETER
TEST CONDITIONS
s
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short Circuit
s
Oscillator Section
Initial Accuracy
Voltage Stability
Temperature Stability
Amplitude
s
Error Amp Section
Input Voltage
Input Bias Current
A
VOL
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
V
OUT
HIGH
V
OUT
LOW
s
Current Sense Section
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
s
Output Section
Output Low Level
Output High Level
Rise Time
Fall Time
I
SINK
=20mA
I
SINK
=200mA
I
SOURCE
=20mA
I
SOURCE
=200mA
T
J
=25˚C, C
L
=1nF (Note 2)
T
J
=25˚C, C
L
=1nF (Note 2)
13.0
12.0
0.1
1.5
13.5
13.5
50
50
150
150
0.4
2.2
13.0
12.0
0.1
1.5
13.5
13.5
50
50
150
150
0.4
2.2
V
V
V
V
ns
ns
(Notes 3 & 4)
V
COMP
=5V (Note 3)
12≤V
CC
≤25V
(Note 3)
V
Sense
=0V
T
J
=25˚C (Note 2)
2.85
0.9
3.00
1.0
70
-2
150
-10
300
3.15
1.1
2.85
0.9
3.00
1.0
70
-2
150
-10
300
3.15 V/V
1.1
V
dB
µA
ns
V
COMP
=2.5V
V
FB
=0V
2≤V
OUT
≤4V
(Note 2)
12≤V
CC
≤25V
V
FB
=2.7V, V
COMP
=1.1V
V
FB
=2.3V, V
COMP
=5V
V
FB
=2.3V, R
L
=15kΩ to Gnd
V
FB
=2.7V, R
L
=15kΩ to V
REF
65
0.7
60
2
-0.5
5
2.45
2.50
-0.3
90
1.0
70
6
-0.8
6
0.7
1.1
2.55
-1.0
65
0.7
60
2
-0.5
5
2.42
2.50
-0.3
90
1.0
70
6
-0.8
6
0.7
1.1
2.58 V
-2.0
µA
dB
MHz
dB
mA
mA
V
V
Sawtooth Mode, T
J
=25˚C
12≤V
CC
≤25V
Sawtooth Mode T
MIN
≤T
A
≤T
MAX
(Note 2)
V
OSC
(peak to peak)
47
52
0.2
5
1.7
57
1.0
47
52
0.2
5
1.7
57
1.0
kHz
%
%
V
T
J
=25˚C, I
REF
=1mA
12≤V
CC
≤25V
1≤I
REF
≤20mA
(Note 2)
Line, Load, Temp. (Note 2)
10Hz≤ f≤10kHz, T
J
=25˚C (Note 2)
T
A
=125˚C, 1000 Hrs. (Note 2)
T
A
=25˚C
-30
4.90
50
5
-100
25
-180
-30
4.95
5.00
6
6
0.2
5.05
20
25
0.4
5.10
4.82
50
5
-100
25
4.90
5.00
6
6
0.2
5.10 V
20
25
0.4
mV
mV
mV/˚C
µV
mV
-180 mA
5.18 V
2
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
