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参数资料
| 型号： | LT1108CS8-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST INV 5V .4A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压），反相 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 2 V ~ 30 V |
| 频率 - 开关： | 19kHz |
| 电流 - 输出： | 400mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1108
TYPICAL PERFOR A CE C HARA C TERISTICS
22
21
20
19
18
Oscillator Frequency
80
75
70
65
Duty Cycle
44
42
40
38
Switch-ON Time
17
16
60
36
34
15
14
55
32
13
–50
–25
0
25
50
75
100
50
–50
–25
0
25
50
75
100
30
–50
–25
0
25
50
75
100
TEMPERATURE (°C)
LT1108 ? TPC07
Minimum/Maximum Frequency
vs ON-Time
TEMPERATURE (°C)
Switch Saturation Voltage
Step-Up Mode
LT1108 ? TPC08
TEMPERATURE (?C)
Switch Saturation Voltage
Step-Down Mode
LT1108 ? TPC09
28
26
24
22
20
18
16
14
12
10
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
I SW = 650mA
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
I SW = 650mA
0
25
30
35
40
45
50
0
–50
–25
0
25
50
75
100
0.8
–50
–25
0
25 50
75
100
ON-TIME ( μ s)
PI FU C TI
S
LT1108 ? TPC10
TEMPERATURE (°C)
LT1108 ? TPC11
TEMPERATURE (°C)
LT1108 ? TPC12
I LIM (Pin 1): Connect this pin to V IN for normal use. Where
lower current limit is desired, connect a resistor between
I LIM and V IN . A 220 ? resistor will limit the switch current
to approximately 400mA.
V IN (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 V IN .
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.
4
GND (Pin 5): Ground.
AO (Pin 6): Auxiliary gain block (GB) output. Open collector,
can sink 100 μ 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1108CS8PBF | 制造商:Linear Technology 功能描述:DC/DC Converter Adj Micropower 2-30V SO8 |
| LT1109 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V, 12V |
| LT1109-12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V, 12V |
| LT1109-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V, 12V |
| LT1109A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 12V |
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