參數(shù)資料
型號: LT4256-3CGN
廠商: LINEAR TECHNOLOGY CORP
元件分類: 電源管理
英文描述: Positive High Voltage Hot Swap Controller with Open-Circuit Detect
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝: 0.150 INCH, PLASTIC, SSOP-16
文件頁數(shù): 3/20頁
文件大?。?/td> 305K
代理商: LT4256-3CGN
LT4256-3
3
42563f
V
FB
FB Voltage Threshold
FB High-to-Low Transition
FB Low-to-High Transition
G
G
3.95
4.20
0.3
3.99
4.45
0.45
0.25
0.60
0.1
–0.1
–115
3
4.65
3
0.85
–87
1.7
6
0.8
3.2
1
4.03
4.65
0.60
0.4
1.0
1
–1
–145
5
5
4.5
1.2
–130
3
9
2
5
3
V
V
V
V
V
V
FBHYS
V
OLPGD
FB Hysteresis Voltage
PWRGD Output Low Voltage
I
O
= 1.6mA
I
O
= 5mA
V
PWRGD
= 80V
FB = 4.5V
I
PWRGD
I
INFB
I
TIMERPU
I
TIMERPD
V
THTIMER
D
TIMER
V
RETRYTH
I
INRTR
t
PHLUV
t
PLHUV
t
PHLFB
t
PLHFB
t
PHLSENSE
PWRGD Pin Leakage Current
FB Input Current
TIMER Pull-Up Current
TIMER Pull-Down Current
TIMER Shutdown Threshold
Duty Cycle (RETRY Mode)
RETRY Threshold
RETRY Input Current
UV Low to GATE Low
UV High to GATE High
FB Low to PWRGD Low
FB High to PWRGD High
(V
CC
– V
SENSE
) High to GATE Low
μ
A
μ
A
μ
A
μ
A
V
%
V
μ
A
μ
s
μ
s
μ
s
μ
s
μ
s
G
–85
1.5
4.3
1.5
0.4
G
C
TIMER
= 10nF
G
G
G
RETRY = GND
C
GATE
= 100pF
C
GATE
= 100pF
V
CC
– V
SENSE
= 275mV
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= 48V unless otherwise noted.
The
G
denotes the specifications which apply over the full operating
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
An internal clamp limits the GATE pin to a minimum of 10V above
V
CC
. Driving this pin to a voltage beyond the clamp voltage may damage
the part.
TYPICAL PERFOR U
Specifications are at T
A
= 25
°
C unless otherwise noted.
I
CC
vs Temperature
SENSE Regulation Voltage
vs Temperature
I
CC
vs V
CC
TEMPERATURE (
°
C)
–50
10
S
15
20
48
58
–25
0
25
50
42563 G01
75
100
53
FB = 0V
FB > 2V
V
CC
(V)
10
2.0
2.5
3.5
40
60
42563 G02
1.5
1.0
20
30
50
70
80
0.5
0
3.0
I
C
TEMPERATURE (
°
C)
–50
0
I
C
0.5
1.0
1.5
2.5
–25
0
25
50
42563 G03
75
100
2.0
V
CC
= 48V
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