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參數(shù)資料
| 型號： | LT1640LCS8#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LT1640LCS8#TRPBF |
4
LT1640L/LT1640H
1640lhfb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Gate Voltage vs Temperature
TEMPERATURE (
°C)
12.0
GATE
VOLTAGE
(V)
13.0
14.0
15.0
12.5
13.5
14.5
–25
0
75
1640 G04
100
–50
25
50
TEMPERATURE (
°C)
–50
48
TRIP
VOLTAGE
(mV)
49
51
52
53
55
25
0
50
1640 G05
50
54
100
–25
75
TEMPERATURE (
°C)
–50
GATE
PULL-UP
CURRENT
(
A)
48
47
46
45
44
43
42
41
40
75
1640 G06
– 25
100
50
25
0
VGATE = 0V
Gate Pull-Up Current
vs Temperature
Gate Pull-Down Current
vs Temperature
TEMPERATURE (
°C)
–50
GATE
PULL-DOWN
CURRENT
(mA)
49
52
55
75
1640 G07
46
43
40
–25
0
25
50
100
VGATE = 2V
PWRGD Output Low Voltage
vs Temperature (LT1640L)
TEMPERATURE (
°C)
–50
PWRGD
OUTPUT
LOW
VOLTAGE
(V)
0.3
0.4
0.5
75
1640 G08
0.2
0.1
0
–25
25
0
50
100
IOUT = 1mA
TEMPERATURE (
°C)
–50
2
OUTPUT
IMPEDANCE
(k
)
3
4
5
6
7
8
–25
25
050
75
1640 G09
100
VDRAIN – VEE > 2.4V
PWRGD Output Impedance
vs Temperature (LT1640H)
Circuit Breaker Trip Voltage
vs Temperature
pin which pulls the module’s enable pin low, forcing it off.
When VDRAIN drops below VPG, the PWRGD sink current
is turned off and a 6.5k resistor is connected between
PWRGD and DRAIN, allowing the module’s 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
UU
U
PWRGD/PWRGD (Pin 1): Power Good Output Pin. This pin
will toggle when VDRAIN is within VPG of VEE. This pin can
be connected directly to the enable pin of a power module.
When the DRAIN pin of the LT1640L is above VEE by more
than VPG, the PWRGD pin will be high impedance, allowing
the pull-up current of the module’s enable pin to pull the
pin high and turn the module off. When VDRAIN drops
below VPG, the PWRGD pin sinks current to VEE, pulling
the enable pin low and turning on the module.
When the DRAIN pin of the LT1640H is above VEE by more
than VPG, the PWRGD pin will sink current to the DRAIN
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