Electrical Characteristics: -25° ≤ TA ≤ 85˚C for CS2842A/2843A, 0° ≤ TA ≤ 70˚C for CS3842A/3843A. VCC = 15V (Note 1);
RT = 680Ω, CT = .022µF for triangular mode, RT = 10kΩ, CT = 3.3nF for sawtooth mode (see Figure 3), unless otherwise stated.
CS2842A/CS2843A
CS3842A/CS3843A
PARAMETER
TEST CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
ꢀ Reference Section
Output Voltage
TJ = 25˚C, IOUT = 1mA
4.95 5.00 5.05 4.90 5.00 5.10
V
Line Regulation
12 ≤ VIN ≤ 25V
6
20
6
20
25
mV
mV
Load Regulation
1 ≤ IOUT ≤ 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, 1kHrs. (Note 2)
TA = 25˚C
4.90
-30
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
Sawtooth Mode (see Fig. 3), TJ = 25˚C 47
Triangular Mode (see Fig. 3), TJ = 25˚C 47
52
52
57
57
47
44
52
52
57
60
kHz
kHz
Voltage Stability
Temp. Stability
12 ≤ VCC ≤ 25V
0.2
1.0
0.2
1.0
%
Sawtooth Mode TMIN ≤ TA ≤ TMAX
(Note 2)
5
5
%
Triangular Mode TMIN ≤ TA ≤ TMAX
(Note 2)
8
8
%
V
Amplitude
OSC peak to peak
1.7
8.3
1.7
8.3
Discharge Current
TJ = 25˚C
TMIN ≤ TA ≤ TMAX
7.5
7.2
9.3
9.5
7.5
7.2
9.3 mA
9.5 mA
ꢀ Error Amp Section
Input Voltage
VCOMP = 2.5V
VFB = 0
2.45 2.50 2.55 2.42 2.50 2.58 V
Input Bias Current
AVOL
-0.3
90
1.0
70
6
-1.0
-0.3
90
1.0
70
6
-2.0 µA
dB
2 ≤ VOUT ≤ 4V
(Note 2)
65
0.7
60
2
65
0.7
60
2
Unity Gain Bandwidth
PSRR
MHz
12 ≤ VCC ≤ 25V
dB
mA
mA
V
Output Sink Current
Output Source Current
VOUT High
VFB = 2.7V, VCOMP = 1.1V
VFB = 2.3V, VCOMP = 5V
-0.5
5
-0.8
6
-0.5
5
-0.8
6
VFB = 2.3V, RL = 15kΩ to ground
VFB = 2.7V, RL = 15kΩ to VREF
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
V
COMP = 5V (Note 3)
0.9
1.0
70
1.1
0.9
1.0
70
1.1
V
12 ≤ VCC ≤ 25V (Note 3)
VSense = 0
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
2
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
