Datasheet

LTC4355
3
4355ff
For more information www.linear.com/LTC4355
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.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT
Operating Supply Range
l
9 80 V
I
OUT
Supply Current
l
2 3 mA
I
INx
INx Pin Input Current GATE High
l
0.5 0.6 1.2 mA
DV
GATEx
External N-Channel Gate Drive
(V
GATEx
– V
INx
)
V
OUT
= 20V to 80V
V
OUT
= 9V to 20V
l
l
10
4.5
14
6
18
18
V
V
I
GATEx(UP)
External N-Channel Gate Pull-Up Current V
GATEx
= V
INx
,
V
INx
– V
OUT
= 100mV
l
–14 –20 –26 µA
I
GATEx(DN)
External N-Channel Gate Pull-Down in Fault
Condition
Gate Drive Off, V
GATEx
= V
INx
+5V
l
1 2 A
t
OFF
Gate Turn-Off Time V
INx
– V
OUT
= 55mV
–
|
–
–1V, C
GATE
= 0
V
GATEx
– V
INx
< 1V
l
0.3 0.4 µs
V
MONx(TH)
MONx Pin Threshold Voltage V
MONx
Rising
l
1.209 1.227 1.245 V
V
MONx(HYST)
MONx Pin Hysteresis Voltage
l
10 30 45 mV
I
MONx(IN)
MONx Pin Input Current V
MONx
= 1.23V
l
0 ±1 µA
V
INx(TH)
INx Pin Threshold Voltage V
INx
Rising
l
3 3.5 4 V
V
INx(HYST)
INx Pin Hysteresis Voltage
l
25 75 150 mV
DV
SD
Source-Drain Regulation Voltage
(V
INx
– V
OUT )
V
GATEx
– V
INx
= 2.5V
l
10 25 55 mV
DV
SD(FLT)
Short-Circuit Fault Voltage
(V
INx
– V
OUT
) Rising
SET = 0V
SET = 100kΩ
SET = Hi-Z
l
l
l
0.2
0.4
1.3
0.25
0.5
1.5
0.3
0.6
1.6
V
V
V
DV
SD(FLT)(HYST)
Short-Circuit Fault Hysteresis Voltage 30 mV
V
F LT
PWRFLTx, FUSEFLTx, VDSFLT Pins
Output Low
I
PWRFLTx
, I
FUSEFLTx
, I
VDSFLT
= 5mA
l
100 200 mV
I
F LT
PWRFLTx, FUSEFLTx, VDSFLT Pins
Leakage Current
V
PWRFLTx
, V
FUSEFLTx
, V
VDSFLT
= 5V
l
0 ±1 µA
R
SET(L)
SET Resistance Range for DV
SD(FLT)
= 0.25V
l
0 5
kW
R
SET(M)
SET Resistance Range for DV
SD(FLT)
= 0.5V
l
50 150
kW
R
SET(H)
SET Resistance Range for DV
SD(FLT)
= 1.5V
l
1
MW
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 9V < V
OUT
< 80V, unless otherwise noted.
Note 2: All currents into pins are positive, all voltages are referenced to
GND unless otherwise specified.
Note 3: The GATEx pins are internally limited to a minimum of 13V above
INx. Driving these pins beyond the clamp may damage the part.