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