Datasheet

LTC4357
3
4357fd
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.
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
OUT
= V
DD
, V
DD
= 9V to 80V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Operating Supply Range
l
9 80 V
I
DD
Supply Current
l
0.5 1.25 mA
I
IN
IN Pin Current V
IN
= V
OUT
±1V
l
150 350 500 µA
I
OUT
OUT Pin Current V
IN
= V
OUT
±1V
l
80 210 µA
DV
GATE
External N-Channel Gate Drive
(V
GATE
– V
IN
)
V
DD
, V
OUT
= 20V to 80V
V
DD
, V
OUT
= 9V to 20V
l
l
10
4.5
12
6
15
15
V
V
I
GATE(UP)
External N-Channel Gate Pull-Up Current V
GATE
= V
IN
, V
IN
– V
OUT
= 0.1V
l
–14 –20 –26 µA
I
GATE(DOWN)
External N-Channel Gate Pull-Down
Current in Fault Condition
V
GATE
= V
IN
+ 5V
l
1 2 A
t
OFF
Gate Turn-Off Time V
IN
– V
OUT
= 55mV
–
|
–
–1V,
V
GATE
– V
IN
< 1V, C
GATE
= 0pF
l
300 500 ns
DV
SD
Source-Drain Regulation Voltage
(V
IN
– V
OUT
)
V
GATE
– V
IN
= 2.5V
l
10 25 55 mV
Note 2: All currents into pins are positive, all voltages are referenced to
GND unless otherwise specified.
Note 3: An internal clamp limits the GATE pin to a minimum of 10V above
IN or 100V above GND. Driving this pin to voltages beyond this clamp may
damage the device.
typical perForMance characteristics
V
DD
Current (I
DD
vs V
DD
) IN Current (I
IN
vs V
IN
) OUT Current (I
OUT
vs V
OUT
)
V
DD
(V)
0
I
DD
(µA)
400
600
80
4357 G01
200
0
20
40
60
800
V
DD
= V
OUT
= V
IN
± 1V
V
IN
(V)
0
I
IN
(µA)
200
300
80
4357 G02
100
0
20
40
60
400
V
DD
= V
OUT
= V
IN
+ 1V
V
DD
= V
OUT
= V
IN
– 1V
V
OUT
(V)
0
I
OUT
(µA)
60
120
80
4357 G03
0
20
40
60
180
30
90
150
V
DD
= V
OUT
= V
IN
+ 1V
V
DD
= V
OUT
= V
IN
– 1V