LTC1644IGN Просмотр технического описания (PDF) - Linear Technology
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LTC1644IGN Datasheet PDF : 24 Pages
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LTC1644
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, V3VIN = 3.3V, V5VIN = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VTH
Power Good Threshold Voltage
12VOUT
VEEOUT
3VOUT
5VOUT
q 10.8 11.1 11.4
V
q – 10.4 – 10.5 – 11.1
V
q 2.8
2.9
3.0
V
q 4.50 4.62 4.75
V
V3VONLY 3V Only Window Voltage
V3VONLY = V5VIN – V3VIN, V5VOUT = V3VOUT = 3V
q 50
107 200
mV
VNOVEEIN No VEEIN Threshold Voltage
VEEIN
q –4
– 4.6 – 6.3
V
VIL
Input Low Voltage
OFF/ON, RESETIN, FAULT
q
0.8
V
VIH
Input High Voltage
OFF/ON, RESETIN, FAULT
q2
V
IIN
OFF/ON, RESETIN Input Current OFF/ON, RESETIN = 0V
OFF/ON, RESETIN = 12VIN
q
±0.08 ±10
µA
q
±0.08 ±10
µA
RESETOUT, FAULT Output Current RESETOUT, FAULT = 5V, OFF/ON = 0V, RESETIN = 3.3V q
±0.08 ±10
µA
PWRGD Output Current
PWRGD = 5V, OFF/ON = 4V
q
±0.08 ±10
µA
5VSENSE Input Current
3VSENSE Input Current
5VIN Input Current
3VIN Input Current
ITIMER
5VOUT Input Current
3VOUT Input Current
TIMER Pin Current
VTIMER
RDIS
VOL
VPXG
TIMER Threshold Voltages
5VOUT Discharge Impedance
3VOUT Discharge Impedance
12VOUT Discharge Impedance
VEEOUT Discharge Impedance
Output Low Voltage
PRECHARGE Reference Voltage
5VSENSE = 5V, 5VOUT = 0V
3VSENSE = 3.3V, 3VOUT = 0V
5VIN = 5V, TIMER = 0V
3VIN = 3.3V, TIMER = FLOAT
3VIN = 3.3V, TIMER = 0V
5VOUT = 5V, OFF/ON = 0V, TIMER = 0V
3VOUT = 3.3V, OFF/ON = 0V, TIMER = 0V
OFF/ON = 0V, VTIMER = 0V
VTIMER = 5V, OFF/ON = 4V
(V12VIN – VTIMER), FAULT = 0V
OFF/ON = 4V
OFF/ON = 4V
OFF/ON = 4V
OFF/ON = 4V
PWRGD, RESETOUT, FAULT, I = 3mA
V5VIN = 5V
V5VIN = V3VIN = 3.3V
q
55
100
µA
q
55
100
µA
q
1
1.5
mA
q
490 625
µA
q
380 550
µA
q
102 400
µA
q
161 500
µA
q –15 – 21 –27
µA
q 30
45
70
mA
q 0.5
1
1.3
V
q
45
100
Ω
q
60
100
Ω
q
430 1000
Ω
q
625 1000
Ω
q
0.4
V
q 0.95 1.00 1.05
V
q 0.95 1.00 1.05
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.
1644f
3
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