Datasheet

4
LT3781
3781f
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Supply current specification does not include external FET gate
charge currents. Actual supply currents will be higher and vary with
operating frequency, operating voltages, and the type of external switch
elements used. See Applications Information.
Note 3: Guaranteed but not tested.
Note 4: The LT3781E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
ambient temperature range are assured by design, characterization and
correlation with statistical process controls. For guaranteed performance
to specifications over the –40°C to 85°C operating ambient temperature
range, the LT3781I is available.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
I
CC
Supply Current
vs Temperature
TEMPERATURE (°C)
–55
I
CC
SUPPLY CURRENT (mA)
12580
3781 G01
–40
0
40
20
19
18
17
16
15
V
CC
= 12V
SUPPLY VOLTAGE (V)
9
I
CC
SUPPLY CURRENT (mA)
16
1816
3781 G03
15
10
12
14
18
17
T
A
= 25°C
I
CC
Supply Current
vs V
CC
Supply Voltage
Shutdown Mode: V
CC
vs I
CC
Shutdown Mode: V
CC
vs
Temperature (I
CC
= 1mA)
I
CC
(A)
100µ
V
CC
(V)
18.0
18.2
10m
3781 • G01a
17.8
17.6
300µ
1m
3m
18.4
T
A
= 25°C
TEMPERATURE (°C)
–55
V
CC
(V)
–40
3781 • G01b
0
40
80 125
18.20
18.15
18.10
18.05
18.00