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LTC4244IGN Scheda tecnica(PDF) 3 Page - Linear Technology

Il numero della parte LTC4244IGN
Spiegazioni elettronici  Rugged, CompactPCI Bus Hot Swap Controllers
PDF  28 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC4244IGN Scheda tecnica(HTML) 3 Page - Linear Technology

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LTC4244/LTC4244-1
42441f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ICL
Current Foldback
12VIN = 12V, 12VOUT = 0V, TIMER = 0V
q
–100
–360
–1000
mA
12VIN = 12V, 12VOUT = 10V, TIMER = 0V
q
–550
–850
–1500
mA
VEEIN = –12V, VEEOUT = 0V, TIMER = 0V
q
50
225
350
mA
VEEIN = –12V, VEEOUT = –10V, TIMER = 0V
q
350
610
870
mA
TTS
Thermal Shutdown Temperature
Junction Temperature, Ramping Up
150
°C
VTH
Power Good Threshold Voltage
12VOUT, Ramping Down
q
10.8
11.1
11.4
V
5VOUT, Ramping Down
q
4.50
4.61
4.75
V
3.3VOUT, Ramping Down
q
2.80
2.90
3.00
V
VEEOUT, Ramping Up, LTC4244 Only
q
–10.8
–11.1
–11.4
V
VIL
Logic Input Low Voltage
OFF/ON, RESETIN, FAULT
q
0.8
V
VIH
Logic Input High Voltage
OFF/ON, RESETIN, FAULT
q
2V
IIN
OFF/ON, RESETIN Input Current
OFF/ON, RESETIN = 0V
q
±10
µA
OFF/ON, RESETIN = 12V
q
±10
µA
RESETOUT, FAULT Leakage
RESETOUT, FAULT = 5V, OFF/ON = 0V, RESETIN = 3.3V
q
±10
µA
Current
PWRGD Output Current
PWRGD = 5V, OFF/ON = 4V
q
±10
µA
5VSENSE Input Current
5VSENSE = 5V, 5VOUT = 0V
q
57
100
µA
3.3VSENSE Input Current
3.3VSENSE = 3.3V, 3.3VOUT = 0V
q
56
100
µA
5VIN Input Current
5VIN = 5V, TIMER = 0V
q
0.8
1.5
mA
3.3VIN Input Current
3.3VIN = 3.3V, TIMER = FLOAT
q
510
700
µA
3.3VIN = 3.3V, TIMER = 0V
q
400
550
µA
5VOUT Input Current
5VOUT = 5V, OFF/ON = 0V, TIMER = 0V
q
107
200
µA
3.3VOUT Input Current
3.3VOUT = 3.3V, OFF/ON = 0V, TIMER = 0V
q
170
300
µA
PRECHARGE Input Current
VPRECHARGE = 1V
q
0.1
10
µA
ITIMER
TIMER Pin Current
OFF/ON = 0V, VTIMER = 0V
q
16
21
26
µA
OFF/ON = 5V, VTIMER = 5V
q
25
45
70
mA
VTIMER
TIMER Threshold Voltage
TIMER_HI, (V12VIN – VTIMER), FAULT = 0V, Ramping Up
q
1.3
1.6
1.9
V
TIMER_LO, VTIMER, Ramping Down
q
0.5
0.8
1.1
V
∆VTIMER External Timer Voltage
∆VTIMER = (V12VIN – VTIMER), ITIMER = –1µA
q
1V
RDIS
12VOUT Discharge Resistance
OFF/ON = 4V
q
440
1000
Ω
5VOUT Discharge Resistance
OFF/ON = 4V
q
200
500
Ω
3.3VOUT Discharge Resistance
OFF/ON = 4V
q
200
500
Ω
VEEOUT Discharge Resistance
OFF/ON = 4V
q
390
1000
Ω
VOL
Output Low Voltage
PWRGD, RESETOUT, FAULT, I = 1mA
q
0.4
V
VPXG
PRECHARGE Reference Voltage
VDRIVE = 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 TA = 25°C. V12VIN = 12V, VEEIN = –12V, V3.3VIN = 3.3V, V5VIN = 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 12VIN and VEEIN pins will withstand transient surges up to
±15V, respectively, upon hot insertion.



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