Datasheet

LTC1644
3
1644f
V
TH
Power Good Threshold Voltage 12V
OUT
● 10.8 11.1 11.4 V
V
EEOUT
● –10.4 – 10.5 – 11.1 V
3V
OUT
● 2.8 2.9 3.0 V
5V
OUT
● 4.50 4.62 4.75 V
V
3VONLY
3V Only Window Voltage V
3VONLY
= V
5VIN
– V
3VIN
, V
5VOUT
= V
3VOUT
= 3V ● 50 107 200 mV
V
NOVEEIN
No V
EEIN
Threshold Voltage V
EEIN
● –4 –4.6 –6.3 V
V
IL
Input Low Voltage OFF/ON, RESETIN, FAULT ● 0.8 V
V
IH
Input High Voltage OFF/ON, RESETIN, FAULT ● 2V
I
IN
OFF/ON, RESETIN Input Current OFF/ON, RESETIN = 0V ● ±0.08 ±10 µA
OFF/ON, RESETIN = 12V
IN
● ±0.08 ±10 µA
RESETOUT, FAULT Output Current RESETOUT, FAULT = 5V, OFF/ON = 0V, RESETIN = 3.3V ● ±0.08 ±10 µA
PWRGD Output Current PWRGD = 5V, OFF/ON = 4V ● ±0.08 ±10 µA
5V
SENSE
Input Current 5V
SENSE
= 5V, 5V
OUT
= 0V ● 55 100 µA
3V
SENSE
Input Current 3V
SENSE
= 3.3V, 3V
OUT
= 0V ● 55 100 µA
5V
IN
Input Current 5V
IN
= 5V, TIMER = 0V ● 1 1.5 mA
3V
IN
Input Current 3V
IN
= 3.3V, TIMER = FLOAT ● 490 625 µA
3V
IN
= 3.3V, TIMER = 0V ● 380 550 µA
5V
OUT
Input Current 5V
OUT
= 5V, OFF/ON = 0V, TIMER = 0V ● 102 400 µA
3V
OUT
Input Current 3V
OUT
= 3.3V, OFF/ON = 0V, TIMER = 0V ● 161 500 µA
I
TIMER
TIMER Pin Current OFF/ON = 0V, V
TIMER
= 0V ● –15 –21 –27 µA
V
TIMER
= 5V, OFF/ON = 4V ● 30 45 70 mA
V
TIMER
TIMER Threshold Voltages (V
12VIN
– V
TIMER
), FAULT = 0V ● 0.5 1 1.3 V
R
DIS
5V
OUT
Discharge Impedance OFF/ON = 4V ● 45 100 Ω
3V
OUT
Discharge Impedance OFF/ON = 4V ● 60 100 Ω
12V
OUT
Discharge Impedance OFF/ON = 4V ● 430 1000 Ω
V
EEOUT
Discharge Impedance OFF/ON = 4V ● 625 1000 Ω
V
OL
Output Low Voltage PWRGD, RESETOUT, FAULT, I = 3mA ● 0.4 V
V
PXG
PRECHARGE Reference Voltage V
5VIN
= 5V ● 0.95 1.00 1.05 V
V
5VIN
= V
3VIN
= 3.3V ● 0.95 1.00 1.05 V
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
12VIN
= 12V, V
EEIN
= –12V, V
3VIN
= 3.3V, V
5VIN
= 5V unless otherwise noted.
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: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.