SG1525A/SG1527A SERIES
ELECTRICAL CHARACTERISTICS
Parameter
Oscillator Section
(Note 4)
Initial Accuracy
Voltage Stability
Temperature Stability
(Note 3)
Minimum Frequency
(Note 3)
Maximum Frequency
(Note 3)
Current Mirror
Clock Amplitude
Clock Width
Sync Threshold
Sync Input Current
Error Amplifier Section
(V
CM
= 5.1V)
Input Offset Voltage
Input Bias Current
Input Offset Current
DC Open Loop Gain
Gain-Bandwidth Product
(Note 3)
Output Low Level
Output High Level
Common Mode Rejection
Supply Voltage Rejection
P.W.M. Comparator Section
Minimum Duty Cycle
Maximum Duty Cycle
Input Threshold
(Note 4)
(continued)
Test Conditions
SG1525A/2525A
SG3525A
SG1527A/2527A
SG3527A
Units
Min. Typ. Max. Min. Typ. Max.
37.6
40 42.4 37.6
±0.3 ±1
±3
±6
150
350
350
1.7 2.0 2.2 1.7
3.0 3.5
3.0
0.3 0.5 1.0 0.3
1.2 2.0 2.8 1.2
1.0 2.5
0.5
1
5
10
1
60
1
0.5
3.8
60
50
0
45
0.6
49
0.9
3.3
.05
50
0.4
0.4
19
18
0.2
1.0
7
100
50
0.2
14
45
0.6
3.6
2.0
80
0.6
1.0
25
49
0.9
3.3
.05
50
0.4
0.4
19
18
0.2
1.0
7
100
50
0.2
14
40
±1
±3
42.4
±2
±6
150
2.2
1.0
2.8
2.5
10
10
1
KHz
%
%
Hz
KHz
mA
V
µs
V
mA
mV
µA
µA
dB
MHz
V
V
dB
dB
%
%
V
V
µA
µA
V
mA
V
V
V
V
V
µA
ns
ns
µs
mA
T
J
= 25°C
V
IN
= 8V to 35V
MIN
≤
T
J
≤
MAX
R
T
= 150KΩ, C
T
= 0.1µF
R
T
= 2KΩ, C
T
= 1nF
I
RT
= 2mA
T
J
= 25°C
Sync Voltage = 3.5V
2.0
3.5
0.5
2.0
1.0
2
1
75
2
0.2
5.6
75
60
R
L
≥10MΩ,
T
J
= 25°C
A
V
= 0dB, T
J
= 25°C
V
CM
= 1.5V to 5.2V
V
IN
= 8V to 35V
V
COMP
= 0.6V
V
COMP
= 3.6V
Zero Duty Cycle
Maximum Duty Cycle
60
1
3.8
60
50
75
2
0.2
5.6
75
60
0.5
0
Input Bias Current
Soft-Start Section
Soft Start Current
V
SHUTDOWN
= 0V
Soft Start Voltage
V
SHUTDOWN
= 2V
V
SHUTDOWN
= 2.5V
Shutdown Input Current
Output Drivers Section
(each transistor, V
C
= 20V)
Output High Level
I
SOURCE
= 20mA
I
SOURCE
= 100mA
Output Low Level
I
SINK
= 20mA
I
SINK
= 100mA
Undervoltage Lockout
V
COMP
and V
SS
= High
Collector Leakage
(Note 5)
V
C
= 35V
Rise Time
C
L
= 1nF, T
J
= 25°C
Fall Time
C
L
= 1nF, T
J
= 25°C
Shutdown Delay
(Note 3)
V
SD
= 3V, C
S
= 0, T
J
= 25°C
Total Standby Current
Standby Current
V
IN
= 35V
3.6
2.0
80
0.6
1.0
25
18
17
18
17
0.4
2.2
8
200
600
300
0.5
20
6
6
0.4
2.2
8
200
600
300
0.5
20
11/91 Rev 1.3 10/96
Copyright
©
1996
3
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
MICROSEMI [ MICROSEMI CORPORATION ]
