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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)： | 5/32頁 |
| 文件大小： | 452K |
| 代理商： | LT1105IN8 |
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5
LT1103/LT1105
ELECTRICAL CHARACTERISTICS
V
IN
= 20V, V
C
= 0.85V, OVLO = 0V, V
SW
Open, T
A
=
25
°
C, unless otherwise noted.
SYMBOL
PARAMETER
Switch Output Low Level
(LT1105)
Rise Time (LT1105)
Fall Time (LT1105)
I
LIM
Threshold Voltage (LT1105)
Low Switch Drive Lockout
Threshold
High Switch Drive Lockout
Threshold
CONDITONS
I
SW
= 200mA
I
SW
= 750mA
C
L
= 1000pF
C
L
= 1000pF
Duty Cycle = 25% (Note 5)
Measured at V
SW
(LT1103)
Measured at 15V Gate Bias Reference (LT1105)
Measured at V
SW
(LT1103)
Measured at 15V Gate Bias Reference (LT1105)
MIN
TYP
0.25
0.75
50
20
375
9.5
MAX
0.50
1.50
UNIT
G
G
V
V
ns
ns
mV
G
300
9.0
450
10.5
G
V
G
17.0
18.5
20.0
V
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The OVLO pin is clamped with a 5.5V Zener and can sink a
maximum input current of 1mA.
Note 3:
FB input bias current changes as a function of the V
C
pin voltage.
Rate of change of FB input bias current is 11
μ
A/V of change on V
C
. By
including a resistor in series with the FB pin, load regulation can be set
to zero.
Note 4:
Current limit on V
SW
is constant for DC < 35% and decreases for
DC > 35% due to internal slope compensation circuity. The LT1103 switch
current limit is given by I
LIM
=
1.76 (1.536 – DC) above 35% duty cycle.
Note 5:
The current limit threshold voltage is constant for DC < 35% and
decreases for DC > 35% due to internal slope compensation circuitry. The
LT1105 switch current limit threshold voltage is given by V
LIM
= 0.225
(1.7 – DC) above 35% duty cycle.
INPUT VOLTAGE (V)
0
0
S
5
10
15
20
25
5
10
15
20
LT1103 G01
25
30
START
SHUT
25°C
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
Start-Up Supply Current vs
Input Voltage
Quiescent Supply Current vs
Input Voltage
Supply Current vs Input Voltage
INPUT VOLTAGE (V)
0
12
Q
13
15
16
17
22
19
10
20
25
LT1103 G03
14
20
21
18
5
15
30
35
40
125°C
25°C
–55°C
INPUT VOLTAGE (V)
0
S
μ
A
300
400
500
12
LT1103 G02
200
50
0
3
6
9
15
100
150
250
350
450
125
°
C
25
°
C
–55
°
C
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相關代理商/技術參數(shù) |
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| LT1107 | 制造商: 功能描述: |
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