CS2842A, CS3842A, CS2843A, CS3843A
http://onsemi.com
3
MAXIMUM RATINGS*
Rating
Value
Unit
Supply Voltage (ICC < 30 mA)
Self Limiting
Supply Voltage (Low Impedance Source)
30
V
Output Current
±1.0
A
Output Energy (Capacitive Load)
5.0
μJ
Analog Inputs (VFB, Sense)
0.3 to + 5.5
V
Error Amp Output Sink Current
10
mA
Package Thermal Resistance, PDIP8
JunctiontoCase, RθJC
JunctiontoAmbient, RθJA
52
100
°CW
Package Thermal Resistance, SO8
JunctiontoCase, RθJC
JunctiontoAmbient, RθJA
45
165
°CW
Package Thermal Resistance, SO14
JunctiontoCase, RθJC
JunctiontoAmbient, RθJA
30
125
°CW
Lead Temperature Soldering:
Wave Solder (through hole styles only) (Note
1)Reflow (SMD styles only) (Note
2)260 peak
230 peak
°C
1. 10 second maximum.
2. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
ELECTRICAL CHARACTERISTICS (25° ≤ TA ≤ 85° for CS2842A/CS2843A, 0° ≤ TA ≤ 70° for CS3842A/CS3843A.
VCC = 15 V*; RT = 680 Ω, CT = 0.022 μF for triangular mode, RT = 10 kΩ, CT = 3.3 nF for sawtooth mode (see Figure 7); unless otherwise stated.)
Characteristic
Test Conditions
CS2842A/CS2843A
CS3842A/CS3843A
Unit
Min
Typ
Max
Min
Typ
Max
Reference Section
Output Voltage
TJ = 25°C, IOUT = 1.0 mA
4.95
5.00
5.05
4.90
5.00
5.10
V
Line Regulation
12 ≤ VIN ≤ 25 V
6.0
20
6.0
20
mV
Load Regulation
1.0 ≤ IOUT ≤ 20 mA
6.0
25
6.0
25
mV
Temperature Stability
0.2
0.4
0.2
0.4
mV/°C
Total Output Variation
Line, Load, Temperature (Note
3.)4.90
5.10
4.82
5.18
V
Output Noise Voltage
10 Hz ≤ f ≤ 10 kHz, TJ = 25°C (Note 3.) 50
50
μV
Long Term Stability
TA = 125°C, 1.0 kHrs. (Note 3.) 5.0
25
5.0
25
mV
Output Short Circuit
TA = 25°C
30
100
180
30
100
180
mA
Oscillator Section
Initial Accuracy
Sawtooth Mode (see Figure 7), TJ = 25°C Triangular Mode (see Figure 7), TJ = 25°C 47
52
57
47
44
52
57
60
kHz
Voltage Stability
12 ≤ VCC ≤ 25 V
0.2
1.0
0.2
1.0
%
Temperature Stability
Sawtooth Mode TMIN ≤ TA ≤ TMAX (Note 3.) Triangular Mode TMIN ≤ TA ≤ TMAX (Note 3.) 5.0
8.0
5.0
8.0
%
Amplitude
OSC peak to peak
1.7
1.7
V
Discharge Current
TJ = 25°C
TMIN ≤ TA ≤ TMAX
7.5
7.2
8.3
9.3
9.5
7.5
7.2
8.3
9.3
9.5
mA
3. These parameters, although guaranteed, are not 100% tested in production.
*Adjust VCC above the start threshold before setting at 15 V.