SG3844DM Microsemi Analog Mixed Signal Group, SG3844DM Datasheet - Page 3

• Manufacturer Part Number: SG3844DM
• Description: IC PWM CURRENT MODE 8SOIC
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG3844DM

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 8.2 V ~ 30 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC
• Frequency-max: 500kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 2000
Rev. 1.6c
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1844/SG1845 with -55°C ≤ T
SG2845 with -25°C ≤ T
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
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:
Note 3. Range over which the device is functional.
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 (Note 8)
Voltage Stability
Temperature Stability (Note 4)
Amplitude
Discharge Current
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
V
OUT
OUT
SG1844/45
SG2844/45
SG3844/45
High
Low
Parameter
A
≤ 85°C, SG3844/SG3845 with 0°C ≤ T
Parameter
R E C O M M E N D E D O P E R A T I N G C O N D I T I O N S
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
Symbol
( 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 c o n t i n u e n e x t p a g e . )
C
PSRR
A
V
VOL
U R R E N T
N
P
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
R O D U C T I O N
12V ≤ V
T
12 ≤ V
1 ≤ I
Line, Load, Temp.
10Hz ≤ f ≤ 10kHz, T
T
T
T
V
T
T
V
2 ≤ V
T
12 ≤ V
V
V
V
V
J
A
J
MIN
J
MIN
J
RT/CT
COMP
VFB
VFB
VFB
VFB
= 25°C
= 25°C, I
= 25°C
= 25°C
= 125°C, 1000hrs
≤ T
≤ T
= 2.7V, V
= 2.3V, V
= 2.3V, R
= 2.7V, R
O
Test Conditions
(Peak to Peak)
O
= 2.5V
≤ 20mA
IN
CC
A
A
≤ 4V
- M
CC
≤ 25V
≤ T
≤ T
≤ 25V
A
≤ 25V
≤ 70°C, V
O
MAX
MAX
O D E
= 1mA
COMP
COMP
L
L
= 15K to gnd
= 15K to V
= 1.1V
= 5V
CC
J
P W M C
= 25°C
Symbol
= 15V (Note 7), R
D
REF
R
C
T
T
A T A
4.95 5.00 5.05 4.95 5.00 5.05 4.90 5.00 5.10
4.90
2.45 2.50 2.55 2.45 2.50 2.55 2.42 2.50 2.58
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
-0.5
-30
7.8
6.8
0.7
47
65
60
2
5
O N T R O L L E R
SG1844/45
S
-100 -180
-0.3
-0.8
0.2
.02
1.7
8.3
0.7
50
52
90
70
Recommended Operating Conditions
T
6
6
5
5
1
6
6
H E E T
= 10kΩ, and C
SG1844/SG1845 Series
Min.
0.52
0.1
0.001
-55
-25
0
0
5.10 4.90
0.4
9.1
9.3
1.1
20
25
25
57
-1
1
-0.5
-30
7.5
7.2
0.7
47
65
60
2
5
SG2844/45
T
= 3.3nF. Low duty cycle pulse testing
-100 -180
-0.3
-0.8
0.2
0.2
1.7
8.4
0.7
50
52
90
70
Typ.
6
6
5
5
1
6
6
(Note 3)
200
±1
30
5
5.10 4.82
0.4
9.3
9.5
1.1
20
25
25
57
1
1
-0.5
-30
7.5
7.2
0.7
47
65
60
2
5
SG3844/45
Max.
-100 -180
500
150
125
-0.3
-0.8
2.6
1.0
A
0.2
0.2
1.7
8.4
0.7
85
70
50
52
90
70
6
6
5
5
1
6
6
≤ 125°C, SG2844/
5.18
0.4
9.3
9.5
1.1
20
25
25
57
-2
1
Units
Units
mV/°C
kHz
mA
mA
MHz
kΩ
kHz
µF
°C
°C
°C
mA
mA
mA
mA
mA
A
mV
mV
mV
µA
V
V
µV
dB
dB
%
%
V
V
V
V
V
V
3