Datasheet

LM5068
www.ti.com SNVS254C –JANUARY 2004–REVISED MARCH 2013
Electrical Characteristics (continued)
Specifications in standard typeface are for T
J
= +25°C, and those in boldface type apply over the full operating junction
temperature range. Unless otherwise noted V
DD
− V
EE
= 48V.
Symbol Parameter Conditions Min Typ Max Units
Timer
V
THVT
Timer High Voltage Threshold 4 V
V
TLVT
Timer Low Voltage Threshold 1 V
I
TIMER
Timer On (Initial Cycle, Sourcing) V
TIMER
= 2V 4 6 8 µA
Timer Off (Initial Cycle, Sinking) V
TIMER
= 2V 27 mA
Timer On (Circuit Breaker, V
TIMER
= 2V 200 240 280 µA
Sourcing)
Timer Off (Cooling Cycle, Sinking) V
TIMER
= 2V 4 6 8 µA
Gate Drive
V
G
Saturation Gate Drive Voltage V
DD
- V
EE
= 48V 9 10.6 12 V
V
DD
- V
EE
= 10V 7.8 V
V
GLT
Gate Low Threshold Before Gate ramp-up 0.5 V
I
GATE
Gate Pin Current (Sourcing) V
SENSE
= 0V 40 60 80 µA
Gate Pin Current (Sinking) V
SENSE
= 150mV 2.7 mA
V
GATE
= 3V
Gate Pin Current (Sinking) V
SENSE
= 300mV 300 mA
V
GATE
= 1V
PWRGD
V
PGLV
PWRGD Low Voltage I
SINK
= 1mA 0.2 0.6 V
I
PGLC
PWRGD High Leakage Current V
PWRGD
= 90V 1 µA
V
PGV
GATE Voltage at onset of PWRGD 8 V
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