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参数资料
| 型号： | SG3842DM |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | ROHS COMPLIANT, PLASTIC, SOIC-8 |
| 文件页数： | 3/14页 |
| 文件大小： | 224K |
| 代理商： | SG3842DM |
C
U R R E N T
-M
O D E
PWM C
O N T R O L L E R
SG1842/SG1843 Series
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
3
Copyright 2000
Rev. 1.6 4/00
P
R O D U C T I O N
D
A T A
S
H E E T
E L E C T R I C A L C H A R A C T E R I S T I C S
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1842/SG1843 with -55°C
≤
T
≤
125°C, SG2842/
SG2843 with -25°C
≤
T
≤
85°C, SG3842/SG3843 with 0°C
≤
T
≤
70°C, V
= 15V (Note 7), R
= 10k
, and C
T
= 3.3nF. Low duty cycle pulse testing
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability (Note 4)
Total Output Variation (Note 4)
Output Noise Voltage (Note 4)
Long Term Stability (Note 4)
Output Short Circuit
Oscillator Section
Initial Accuracy
Voltage Stability
Temperature Stability (Note 4)
Amplitude
Discharge Current
Parameter
Symbol
Test Conditions
T
J
= 25°C, I
O
= 1mA
12
≤
V
IN
≤
25V
1
≤
I
O
≤
20mA
Line, Load, Temp.
10Hz
≤
f
≤
10kHz, T
J
= 25°C
T
A
= 125°C, 1000hrs
V
N
SG3842/43
Units
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
SG2842/43
4.95 5.00 5.05 4.95 5.00 5.05 4.90 5.00 5.10
6
20
6
6
25
6
0.2
0.4
0.2
4.90
5.10 4.90
50
50
5
25
5
-30
-100 -180
-30
-100 -180
V
20
25
0.4
5.10 4.82
6
6
20
25
0.4
5.18
mV
mV
mV/°C
V
μV
mV
mA
0.2
50
5
-100 -180
25
25
-30
T
J
= 25°C
12
≤
V
CC
≤
25V
T
MIN
≤
T
A
≤
T
MAX
V
RT/CT
(Peak to Peak)
T
J
= 25°C
T
MIN
≤
T
A
≤
T
MAX
Error Amp Section
Input Voltage
Input Bias Current
Open Loop Gain
Unity Gain Bandwidth (Note 4)
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
V
OUT
High
V
OUT
Low
V
COMP
= 2.5V
A
VOL
2
≤
V
O
≤
4V
T
J
= 25°C
12
≤
V
CC
≤
25V
V
VFB
= 2.7V, V
COMP
= 1.1V
V
VFB
= 2.3V, V
COMP
= 5V
V
VFB
= 2.3V, R
L
= 15K to gnd
V
VFB
= 2.7V, R
L
= 15K to V
REF
(Electrical Characteristics continue next page.)
PSRR
SG1842/43
47
52
0.2
5
1.7
8.3
57
1
47
52
0.2
5
1.7
8.4
57
1
47
52
0.2
5
1.7
8.4
57
1
kHz
%
%
V
mA
mA
7.8
7.0
8.8
9.0
7.5
7.2
9.3
9.5
7.5
7.2
9.3
9.5
2.45 2.50 2.55 2.45 2.50 2.55 2.42 2.50 2.58
-0.3
-1
-0.3
65
90
65
90
0.7
1
0.7
1
60
70
60
70
2
6
2
6
-0.5
-0.8
-0.5
-0.8
5
6
5
6
0.7
1.1
0.7
V
1
-0.3
90
1
70
6
-0.8
6
0.7
-2
μA
dB
MHz
dB
mA
mA
V
V
65
0.7
60
2
-0.5
5
1.1
1.1
Supply Voltage Range
Output Current (Peak)
Output Current (Continuous)
Analog Inputs (Pin 2, Pin 3)
Error Amp Output Sink Current
Oscillator Frequency Range
Oscillator Timing Resistor
Oscillator Timing Capacitor
Operating Ambient Temperature Range:
SG1842/43
SG2842/43
SG3842/43
Note 3. Range over which the device is functional.
R
T
C
T
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S
(Note 3)
Parameter
Symbol
Units
Recommended Operating Conditions
Min.
Typ.
Max.
30
±1
200
V
A
mA
V
mA
kHz
K
μF
0
2.6
5
0.1
0.52
0.001
500
150
1.0
-55
-25
0
125
85
70
°C
°C
°C
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