參數(shù)資料
型號: LTC4244CGN-1#TRPBF
廠商: Linear Technology
文件頁數(shù): 3/28頁
文件大?。?/td> 337K
描述: IC CTRLR HOTSWAP PCI 20-SSOP
標(biāo)準(zhǔn)包裝: 2,500
類型: 熱交換控制器
應(yīng)用: CompactPCI?
內(nèi)部開關(guān):
電源電壓: 3.3V,5V,±12V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 帶卷 (TR)
3
LTC4244/LTC4244-1
42441f
SYMBOL   PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
CL
Current Foldback
12V
IN
 = 12V, 12V
OUT
 = 0V, TIMER = 0V
q   100
360
1000
mA
12V
IN
 = 12V, 12V
OUT
 = 10V, TIMER = 0V
q
550
850
1500
mA
V
EEIN
 = 12V, V
EEOUT
 = 0V, TIMER = 0V
q
  50
  225
  350
mA
V
EEIN
 = 12V, V
EEOUT
 = 10V, TIMER = 0V
q
  350
  610
  870
mA
T
TS
Thermal Shutdown Temperature
Junction Temperature, Ramping Up
150
V
TH
Power Good Threshold Voltage
12V
OUT
, Ramping Down
q
  10.8
  11.1
  11.4
V
5V
OUT
, Ramping Down
q
  4.50
  4.61
  4.75
V
3.3V
OUT
, Ramping Down
q
  2.80
  2.90
  3.00
V
V
EEOUT
, Ramping Up, LTC4244 Only
q
10.8
11.1
11.4
V
V
IL
Logic Input Low Voltage
OFF/ON, RESETIN, FAULT
q
0.8
V
V
IH
Logic Input High Voltage
OFF/ON, RESETIN, FAULT
q
2
V
I
IN
OFF/ON, RESETIN Input Current
OFF/ON, RESETIN = 0V
q
?0
礎(chǔ)
OFF/ON, RESETIN = 12V
q
?0
礎(chǔ)
RESETOUT, FAULT Leakage
RESETOUT, FAULT = 5V, OFF/ON = 0V, RESETIN = 3.3V    q
?0
礎(chǔ)
Current
PWRGD Output Current
PWRGD = 5V, OFF/ON = 4V
q
?0
礎(chǔ)
5V
SENSE
 Input Current
5V
SENSE
 = 5V, 5V
OUT
 = 0V
q
57
100
礎(chǔ)
3.3V
SENSE
 Input Current
3.3V
SENSE
 = 3.3V, 3.3V
OUT
 = 0V
q
56
100
礎(chǔ)
5V
IN
 Input Current
5V
IN
 = 5V, TIMER = 0V
q
0.8
1.5
mA
3.3V
IN
 Input Current
3.3V
IN
 = 3.3V, TIMER = FLOAT
q
510
700
礎(chǔ)
3.3V
IN
 = 3.3V, TIMER = 0V
q
400
550
礎(chǔ)
5V
OUT
 Input Current
5V
OUT
 = 5V, OFF/ON = 0V, TIMER = 0V
q
107
200
礎(chǔ)
3.3V
OUT
 Input Current
3.3V
OUT
 = 3.3V, OFF/ON = 0V, TIMER = 0V
q
170
300
礎(chǔ)
PRECHARGE Input Current
V
PRECHARGE
 = 1V
q
0.1
10
礎(chǔ)
I
TIMER
TIMER Pin Current
OFF/ON = 0V, V
TIMER
 = 0V
q
16
21
26
礎(chǔ)
OFF/ON = 5V, V
TIMER
 = 5V
q
25
45
70
mA
V
TIMER
TIMER Threshold Voltage
TIMER_HI, (V
12VIN
  V
TIMER
), FAULT = 0V, Ramping Up    q
1.3
1.6
1.9
V
TIMER_LO, V
TIMER
, Ramping Down
q
0.5
0.8
1.1
V
V
TIMER
External Timer Voltage
V
TIMER
 = (V
12VIN
  V
TIMER
), I
TIMER
 = 1礎(chǔ)
q
1
V
R
DIS
12V
OUT
 Discharge Resistance
OFF/ON = 4V
q
440
1000
&
5V
OUT
 Discharge Resistance
OFF/ON = 4V
q
200
500
&
3.3V
OUT
 Discharge Resistance
OFF/ON = 4V
q
200
500
&
V
EEOUT
 Discharge Resistance
OFF/ON = 4V
q
390
1000
&
V
OL
Output Low Voltage
PWRGD, RESETOUT, FAULT, I = 1mA
q
0.4
V
V
PXG
PRECHARGE Reference Voltage
V
DRIVE
 = 2V
q
0.95
1
1.05
V
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
 = 25?/SPAN>C. V
12VIN
 = 12V, V
EEIN
 = 12V, V
3.3VIN
 = 3.3V, V
5VIN
 = 5V, unless
otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3: The 12V
IN
 and V
EEIN
 pins will withstand transient surges up to
?5V, respectively, upon hot insertion.
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