LTC1646I Просмотр технического описания (PDF) - Linear Technology
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LTC1646I Datasheet PDF : 20 Pages
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LTC1646
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V5VIN = 5V and V3VIN = 3.3V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
IIN
OFF/ON Input Current
OFF/ON = 5V
OFF/ON = 0V
q
±0.08 ±10
q
±0.08 ±10
RESETIN Input Current
RESETIN = 5V
RESETIN = 0V
q
±0.08 ±10
q
±0.08 ±10
5VSENSE Input Current
3VSENSE Input Current
5VSENSE = 5V, 5VOUT = 0V
3VSENSE = 3.3V, 3VOUT = 0V
q
66
100
q
66
100
3VIN Input Current
3VIN = 3.3V
q
460 1000
5VOUT Input Current
3VOUT Input Current
5VOUT = 5V, OFF/ON = 0V
3VOUT = 3.3V, OFF/ON = 0V
q
0.9
1.5
q
0.9
1.5
ITIMER
RDIS
TIMER Pin Current
5VOUT Discharge Impedance
3VOUT Discharge Impedance
OFF/ON = 0V, VTIMER = 0V
OFF/ON = 5V, VTIMER = 5V
OFF/ON = 5V
OFF/ON = 5V
q –7
–5
–3
6.6
q
120 220
q
120 220
VOL
Output Low Voltage
FAULT, PWRGD, RESETOUT, I = 2mA
VPXG
PRECHARGE Reference Voltage VPRECHARGE, V5VIN = 5V and 3.3V
q
0.25 0.4
q 0.90 1.00 1.10
UNITS
µA
µA
µA
µA
µA
µA
µA
mA
mA
µA
mA
Ω
Ω
V
V
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.
TYPICAL PERFOR A CE CHARACTERISTICS
5V Current Foldback Profile
12
11
10
9
8
7
6
5
4
3
2
1
RSENSE = 0.007Ω
0
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
1646 G01
3.3V Current Foldback Profile
12
11
10
9
8
7
6
5
4
3
2
1
RSENSE = 0.005Ω
0
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
1646 G02
5VIN Supply Current vs
Temperature
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1646 G03
3
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