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参数资料
| 型号： | LIT1108CS8-12#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 25 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, SOIC-8 |
| 文件页数： | 7/12页 |
| 文件大小： | 266K |
| 代理商： | LIT1108CS8-12#PBF |
4
LT1108
CC
HARA TERISTICS
UW
A
TYPICALPERFOR
CE
GND (Pin 5): Ground.
AO (Pin 6): Auxiliary gain block (GB) output. Open collector,
can sink 100
A.
SET (Pin 7): GB input. GB is an op amp with positive input
connected to SET pin and negative input connected to
1.245V reference.
FB/SENSE (Pin 8): On the LT1108 (adjustable) this pin
goes to the comparator input. On the LT1108-5 and
LT1108-12, this pin goes to the internal application resistor
that sets output voltage.
Oscillator Frequency
Duty Cycle
Switch-ON Time
TEMPERATURE (°C)
13
FREQUENCY
(kHz)
14
16
17
18
22
LT1108 TPC07
15
19
20
21
–50
25
75
–25
0
50
100
TEMPERATURE (°C)
50
DUTY
CYCLE
(%)
55
60
65
70
80
LT1108 TPC08
75
–50
25
75
–25
0
50
100
Minimum/Maximum Frequency
Switch Saturation Voltage
vs ON-Time
Step-Up Mode
Step-Down Mode
PI
U
FU
U
C
U
S
O
TI
ILIM (Pin 1): Connect this pin to VIN for normal use. Where
lower current limit is desired, connect a resistor between
ILIM and VIN. A 220 resistor will limit the switch current
to approximately 400mA.
VIN (Pin 2): Input supply voltage.
SW1 (Pin 3): Collector of power transistor. For step-up
mode connect to inductor/diode. For step-down mode
connect to VIN.
SW2 (Pin 4): Emitter of power transistor. For step-up
mode connect to ground. For step-down mode connect to
inductor/diode. This pin must never be allowed to go more
than a Schottky diode drop below ground.
TEMPERATURE (C)
–50
38
40
42
25
75
LT1108 TPC09
36
34
–25
0
50
100
32
30
SWITCH-ON
TIME
(
s)
44
TEMPERATURE (°C)
–50
V
CESAT
(V)
0.3
0.4
0.5
25
75
LT1108 TPC11
0.2
0.1
0
–25
0
50
0.6
0.7
0.8
100
ISW = 650mA
TEMPERATURE (°C)
–50
0.8
V
SAT
(V)
1.0
1.1
1.2
1.3
1.4
1.5
–25
0
25
50
LT1108 TPC12
75
1.6
1.7
1.8
0.9
100
ISW = 650mA
ON-TIME (
s)
25
FREQUENCY
(kHz)
20
24
28
45
LT1108 TPC10
16
12
0
30
35
40
50
18
22
26
14
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LIT-2013 | 制造商:JST Manufacturing 功能描述: |
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