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参数资料
| 型号： | LT1108CS8-5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 2/12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
A BSOLUTE
A XI U
R A TI G S
Supply Voltage (V IN ) ............................................... 36V
SW1 Pin Voltage (V SW1 ) ......................................... 50V
SW2 Pin Voltage (V SW2 ) ............................ – 0.5V to V IN
Feedback Pin Voltage (LT1108) ............................. 5.5V
Sense Pin Voltage (LT1108, -5, -12) ...................... 36V
PACKAGE/ORDER I FOR ATIO
ORDER PART
Maximum Power Dissipation ............................ 500mW
Maximum Switch Current ...................................... 1.5A
Operating Temperature Range .................... 0 ° C to 70 ° C
Storage Temperature Range ................ – 65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec)................. 300 ° C
ORDER PART
TOP VIEW
NUMBER
TOP VIEW
NUMBER
I LIM 1
V IN 2
SW1 3
SW2 4
8
7
6
5
FB (SENSE*)
SET
A0
GND
LT1108CN8
LT1108CN8-5
LT1108CN8-12
I LIM 1
V IN 2
SW1 3
SW2 4
8
7
6
5
FB (SENSE*)
SET
A0
GND
LT1108CS8
LT1108CS8-5
LT1108CS8-12
N8 PACKAGE
8-LEAD PLASTIC DIP
*FIXED VERSIONS
T JMAX = 90 ° C, θ JA = 130 ° C/W
ELECTRICAL C HARA C TERISTICS
S8 PACKAGE
8-LEAD PLASTIC SOIC
*FIXED VERSIONS
T JMAX = 90 ° C, θ JA = 150 ° C/W
T A = 25 ° C, V IN = 3V, unless otherwise noted.
S8 PART MARKING
1108
10805
10812
SYMBOL
I Q
PARAMETER
Quiescent Current
Quiescent Current, Boost Mode Configuration
CONDITIONS
Switch OFF
No Load
LT1108-5
LT1108-12
q
MIN
TYP
110
135
250
MAX
150
UNITS
μ A
μ A
μ A
V IN
Input Voltage
Step-Up Mode
q
2
12.6
V
Step-Down Mode
q
30.0
V
Comparator Trip Point Voltage
LT1108 (Note 1)
q
1.2
1.245
1.3
V
V OUT
Output Sense Voltage
Comparator Hysteresis
Output Hysteresis
LT1108-5 (Note 2)
LT1108-12 (Note 2)
LT1108
LT1108-5
q
q
q
q
4.75
11.4
5
12
5
20
5.25
12.6
10
40
V
V
mV
mV
LT1108-12
q
50
100
mV
f OSC
Oscillator Frequency
q
14
19
25
kHz
Duty Cycle
Full Load, Step-Up Mode
q
63
70
78
%
t ON
V OL
V SAT
Switch-ON Time
Feedback Pin Bias Current
Set Pin Bias Current
Gain Block Output Low
Reference Line Regulation
SW SAT Voltage, Step-Up Mode
I LIM Tied to V IN , Step-Up Mode
LT1108, V FB = 0V
V SET = V REF
I SINK = 100 μ A, V SET = 1V
2V ≤ V IN ≤ 5V
5V ≤ V IN ≤ 30V
V IN = 3V, I SW = 650mA
q
q
q
q
q
q
q
28
36
10
20
0.15
0.20
0.02
0.5
48
50
100
0.4
0.400
0.075
0.65
μ s
nA
nA
V
%/V
%/V
V
V IN = 5V, I SW = 1A
0.8
1.00
V
2
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