LT1105IN8 Linear Technology, LT1105IN8 Datasheet - Page 4

• Manufacturer Part Number: LT1105IN8
• Description: IC OFFLINE SWIT CM HV 8DIP
• Manufacturer: Linear Technology

Specifications of LT1105IN8

• Output Isolation: Isolated
• Frequency Range: 20 ~ 200kHz
• Voltage - Input: 7 ~ 30 V
• Voltage - Output: 20V
• Power (watts): 100W
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LT1103/LT1105
V
SYMBOL
DC
V
gm
A
BV
ELECTRICAL CHARACTERISTICS
4
FB
V
IN
I
I
SW
IN
= 20V, V
PARAMETER
Preset Max Switch Duty Cycle
(LT1103)
Preset Max Switch Duty Cycle
(LT1105)
OVLO Threshold
OVLO Input Bias Current
FB Threshold Voltage
FB Input Bias Current
Change in FB Input
Bias Current with Change in V
FB Threshold Line Regulation
Error Amp Transconductance
Error Amp Voltage Gain
V
Shutdown Threshold Voltage
Error Amp Source Current
Error Amp Sink Current
Error Amp Clamp Voltage
Soft-Start Charging Current
Soft-Start Reset Current
Output Switch Leakage
(LT1103)
Switch Breakdown Voltage
(LT1103)
V
Output Switch On Resistance
(LT1103)
I
(LT1103)
Switch Output High Level
(LT1105)
Switch Output High Level
Industrial Grade
Q
C
SW
C
Increase During Switch On Time
Switching Threshold
= 0.85V, OVLO = 0V, V
Current Limit (LT1103)
SW
C
Open, T
CONDITONS
FB = 4V, V
Note: Maximum Duty Cycle Can Be Altered at OSC Pin
FB = 4V, V
Note: Maximum Duty Cycle Can Be Altered at OSC Pin
Industrial Grade
Overvoltage Lockout Threshold at Which Switching is Inhibited
Industrial Grade
OVLO = 2V, Measured Out of Pin (Note 2)
I(V
FB = V
Industrial Grade
FB = V
Industrial Grade
10V < V
Industrial Grade
1V < V
Industrial Grade
Switch Duty Cycle = 0%
Industrial Grade
Industrial Grade
FB = 4.75V
FB = 4.0V
SS = 0V
Industrial Grade
V
V
V
I
Duty Cycle = 25% (Note 4)
I
I
I
I
I
SW
SW
SW
SW
SW
SW
I(V
IN
SW
SW
C
A
= 6V, SS = 0.3V
) = 0mA
= 5mA
= 0.5A to 1.5A
= 200mA, V
= 750mA, V
= 200mA, V
= 750mA, V
C
= 45V
= 15V
) = 50 A
FB
FB
C
25 C, unless otherwise noted.
IN
, V
< 3V
(Note 3)
< 30V
C
C
C
= Open, f
= Open, f
= 1V to 4V (Note 3)
GATE
GATE
GATE
GATE
= 15V
= 15V
= 15V
= 15V
OSC
OSC
= 40kHz, I
= 40kHz, I
SW
SW
= 25mA,
= 25mA,
4.425
4.400
13.00
12.50
12.75
12.25
9000 12000 17500
6000 12000 20000
5000
0.85
MIN
500
450
150
2.3
2.2
1.5
0.7
0.3
4.2
2.0
58
56
55
50
50
25
20
50
5
4
8
7
6
1
0.025
1250
4.50
4.50
1.25
13.5
13.2
TYP
150
275
2.5
1.0
0.7
4.4
2.5
0.4
65
63
10
11
11
40
70
30
3
2
24000
4.575
4.600
MAX
0.10
0.75
250
300
500
200
2.7
2.8
3.0
1.4
4.5
4.5
0.9
4.6
3.0
72
70
75
20
22
13
14
15
60
75
50
mA/A
UNIT
%/V
mho
mho
mho
A/V
A/V
A/V
V/V
V/V
mV
mV
mA
mA
mA
%
%
%
V
V
A
V
V
A
A
V
A
V
V
A
A
A
A
V
A
V
V
V
V