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參數(shù)資料
| 型號： | LT1105IN8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 4/32頁 |
| 文件大?。?/td> | 452K |
| 代理商： | LT1105IN8 |
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4
LT1103/LT1105
V
IN
= 20V, V
C
= 0.85V, OVLO = 0V, V
SW
Open, T
A
=
25
°
C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
DC
PARAMETER
Preset Max Switch Duty Cycle
(LT1103)
Preset Max Switch Duty Cycle
(LT1105)
CONDITONS
FB = 4V, V
C
= Open, f
OSC
= 40kHz, I
SW
= 25mA,
Note: Maximum Duty Cycle Can Be Altered at OSC Pin
FB = 4V, V
C
= Open, f
OSC
= 40kHz, I
SW
= 25mA,
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
C
) = 0mA
MIN
58
TYP
65
MAX
72
UNIT
G
%
G
56
63
70
%
G
55
2.3
2.2
75
2.7
2.8
3.0
4.575
4.600
20
22
13
14
15
0.10
%
V
V
μ
A
OVLO Threshold
G
G
2.5
OVLO Input Bias Current
FB Threshold Voltage
G
1.0
4.50
4.50
10
V
FB
4.425
4.400
5
4
8
7
6
V
V
G
FB Input Bias Current
FB = V
FB
(Note 3)
Industrial Grade
FB = V
FB
, V
C
= 1V to 4V (Note 3)
G
G
μ
A
μ
A
Change in FB Input
Bias Current with Change in V
C
11
11
μ
A/V
μ
A/V
μ
A/V
%/V
μ
mho
μ
mho
μ
mho
V/V
V/V
G
G
Industrial Grade
10V < V
IN
< 30V
I(V
C
) =
±
50
μ
A
FB Threshold Line Regulation
Error Amp Transconductance
G
0.025
gm
9000 12000 17500
6000 12000 20000
5000
500
1250
450
0.85
1.25
50
150
50
150
275
1.5
3
0.7
0.3
0.7
4.2
4.4
25
40
20
1
2
G
G
Industrial Grade
1V < V
C
< 3V
Industrial Grade
Switch Duty Cycle = 0%
24000
A
V
Error Amp Voltage Gain
G
G
V
C
Switching Threshold
Shutdown Threshold Voltage
G
1.4
250
300
V
G
G
mV
mV
μ
A
mA
mA
Industrial Grade
Error Amp Source Current
Error Amp Sink Current
G
G
G
4.5
4.5
0.9
4.6
60
75
Industrial Grade
FB = 4.75V
FB = 4.0V
SS = 0V
Industrial Grade
V
IN
= 6V, SS = 0.3V
V
SW
= 45V
V
SW
= 15V
I
SW
= 5mA
Error Amp Clamp Voltage
G
G
V
V
Soft-Start Charging Current
G
G
μ
A
μ
A
mA
μ
A
μ
A
Soft-Start Reset Current
Output Switch Leakage
(LT1103)
Switch Breakdown Voltage
(LT1103)
V
SW
Current Limit (LT1103)
Output Switch On Resistance
(LT1103)
I
Q
Increase During Switch On Time
(LT1103)
Switch Output High Level
(LT1105)
Switch Output High Level
Industrial Grade
G
G
G
500
200
BV
G
50
70
V
Duty Cycle = 25% (Note 4)
G
2.0
2.5
0.4
3.0
0.75
A
G
I
IN
I
SW
I
SW
= 0.5A to 1.5A
G
30
50
mA/A
I
SW
= 200mA, V
GATE
= 15V
I
SW
= 750mA, V
GATE
= 15V
I
SW
= 200mA, V
GATE
= 15V
I
SW
= 750mA, V
GATE
= 15V
G
G
G
G
13.00
12.50
12.75
12.25
13.5
13.2
V
V
V
V
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