Datasheet

LTC4224-1/LTC4224-2
3
422412fa
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specifi ed.
The l denotes the specifi cations which apply over the full operating
temperature range. T
A
= 25°C, V
CC1
= 5V, V
CC2
= 3.3V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
CC
V
CC
Supply Range V
CC
= Max (V
CC1
, V
CC2
)
l
2.7 6 V
I
CC
V
CC
Supply Current
l
1.4 3 mA
V
CC(UVL)
V
CC
Undervoltage Lockout V
CC
Rising
l
2.2 2.4 2.65 V
V
CCLO
V
CCLO
Supply Range V
CCLO
= Min (V
CC1
, V
CC2
),
V
CC
≥ 2.7V
l
16V
I
CCLO
V
CCLO
Supply Current
l
40 100 A
V
CCLO(UVL)
V
CCLO
Undervoltage Lockout V
CCLO
Falling
l
0.76 0.8 0.84 V
External Gate Drive
ΔV
GATE
Gate Drive
(V
GATEn
– V
CC
)
I
GATEn
= 0µA, –1µA
l
4.5 5.5 7 V
I
GATE(UP)
Gate Pull-Up Current Gate Drive On, V
GATEn
= 1V
l
–7 –10 –13 A
I
GATE(DN)
Gate Pull-Down Current V
ONn
= 1V, V
GATEn
= 10V
l
0.5 1.5 3 mA
I
GATE(FPD)
Gate Fast Pull-Down Current Fast Turn-Off, V
GATEn
= 10V
l
50 125 200 mA
Current Limit
ΔV
SENSE(CB)
Circuit Breaker Trip Sense Voltage
(V
CCn
– SENSEn)
l
22.5 25 27.5 mV
I
SENSE
SENSE Input Current V
SENSE1
= 5V, V
SENSE2
= 3.3V
l
40 100 A
Inputs and Outputs
V
ON(TH)
ONn Threshold Voltage V
ONn
Rising
l
0.76 0.8 0.84 V
ΔV
ON(HYST)
ONn Hysteresis
l
15 30 50 mV
I
ON(IN)
ONn Pull-Up Current V
ONn
= 1V
l
–5 –10 –15 A
V
OL
Output Low Voltage (FAULT)I
FAUL T
= 3mA
l
0.2 0.4 V
Delay
t
CB
Circuit Breaker Delay
l
2.5 5 7.5 ms
t
PHL(SENSE)
Sense Voltage, (V
CCn
– SENSEn) High to
GATE Low
ΔV
SENSE
= 200mV, C
GATE
= 10nF
l
0.4 1 s
t
PLH(GATE)
ONn Low or Input Supply High to GATEn
High Prop Delay
l
51015 ms
t
PLH(UVL)
V
CCn
Low to GATEn Low Prop Delay
l
816 s
t
D(UV)
UV Turn-On Delay V
CC
Out of UV
l
80 160 240 ms
t
D(COOL)
Auto-Retry Cooling Delay Note 3
l
246 s
t
BLANK
Start-Up Circuit Breaker Blanking Delay
l
2.5 5 7.5 ms
Note 3: LTC4224-2 only.
Note 4: The greater of V
CC1
and V
CC2
is the internal supply voltage (V
CC
).
An internal clamp limits the GATE pin to a minimum 5V above V
CC
. Driving
this pin beyond the clamp may damage the device.