参数资料
型号: LT1640LIS8#TRPBF
厂商: Linear Technology
文件页数: 4/16页
文件大小: 192K
描述: IC CONTRLR HOTSWAP NEGVOLT 8SOIC
标准包装: 2,500
类型: 热交换控制器
应用: 通用
内部开关:
电源电压: -10 V ~ -80 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
4
LT1640L/LT1640H
1640lhfb
TYPICAL PERFOR A CE CHARACTERISTICS
W
Gate Voltage vs Temperature
TEMPERATURE (癈)
12.0
13.0
14.0
15.0
12.5
13.5
14.5
25
0
75
1640 G04
100
50
25
50
TEMPERATURE (癈)
50
48
49
51
52
53
55
25
0
50
1640 G05
50
54
100
25
75
TEMPERATURE (癈)
50
48
47
46
45
44
43
42
41
40
75
1640 G06
25
100
50
25
0
V
GATE
 = 0V
Gate Pull-Up Current
vs Temperature
Gate Pull-Down Current
vs Temperature
TEMPERATURE (癈)
50
49
52
55
75
1640 G07
46
43
40
25
0
25
50
100
V
GATE
 = 2V
PWRGD Output Low Voltage
vs Temperature (LT1640L)
TEMPERATURE (癈)
50
0.3
0.4
0.5
75
1640 G08
0.2
0.1
0
25
25
0
50
100
I
OUT
 = 1mA
TEMPERATURE (癈)
50
2
3
4
5
6
7
8
25
25
0
50
75
1  4
100
V
DRAIN
  V
EE
 > 2.4V
PWRGD Output Impedance
vs Temperature (LT1640H)
Circuit Breaker Trip Voltage
vs Temperature
pin which pulls the modules enable pin low, forcing it off.
When V
DRAIN
 drops below V
PG
, the PWRGD sink current
is turned off and a 6.5k resistor is connected between
PWRGD and DRAIN, allowing the modules pull-up cur-
rent to pull the enable pin high and turn on the module.
OV
 
(Pin 2): Analog Overvoltage Input. When OV is pulled
above the 1.223V low to high threshold, an overvoltage
condition is detected and the GATE pin will be immediately
pulled low. The GATE pin will remain low until OV drops
below the 1.203V high to low threshold.
PIN FUNCTIONS
U
U
PWRGD/PWRGD (Pin 1): Power Good Output Pin. This pin
will toggle when V
DRAIN
 is within V
PG
 of V
EE
. This pin can
be connected directly to the enable pin of a power module.
When the DRAIN pin of the LT1640L is above V
EE
 by more
than V
PG
, the PWRGD pin will be high impedance, allowing
the pull-up current of the modules enable pin to pull the
pin high and turn the module off. When V
DRAIN
 drops
below V
PG
, the PWRGD pin sinks current to V
EE
, pulling
the enable pin low and turning on the module.
When the DRAIN pin of the LT1640H is above V
EE
 by more
than V
PG
, the PWRGD pin will sink current to the DRAIN
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