Datasheet
LTC4411
3
4411fa
Measured Thermal Resistance (2-Layer Board*)
COPPER AREA BOARD THERMAL RESISTANCE
TOPSIDE BACKSIDE AREA JUNCTION-TO-AMBIENT
2500mm
2
2500mm
2
2500mm
2
125°C/W
1000mm
2
2500mm
2
2500mm
2
125°C/W
225mm
2
2500mm
2
2500mm
2
130°C/W
100mm
2
2500mm
2
2500mm
2
135°C/W
50mm
2
2500mm
2
2500mm
2
150°C/W
*Each layer uses one ounce copper
LOAD CURRENT (A)
0.5 1.5 2.51.0 2.0 3.0
4411 G01
QUIESCENT CURRENT (µA)
0
LOAD CURRENT (A) LOAD CURRENT (A)
0.5 1.5 2.51.0 2.0 3.0
0
T
A
= –40°C
T
A
= 0°C
T
A
= 40°C
T
A
= 80°C
T
A
= 120°C
FORWARD VOLTAGE (V)
4411 G02
0
RESISTANCE (Ω)
0.5
1.0 1.5 2.0
4411 G03
1000 0.5
0.4
0.3
0.2
0.1
0.15
0.10
0.30
0.25
0.20
0.05
0
100
10
0
T
A
= –40°C
T
A
= 0°C
T
A
= 40°C
T
A
= 80°C
T
A
= 120°C
T
A
= –40°C
T
A
= 0°C
T
A
= 40°C
T
A
= 80°C
T
A
= 120°C
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 6)
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Typical I
QF
vs I
LOAD
at V
IN
= 3.6V
V
FWD
vs I
LOAD
at V
IN
= 3.6V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4411E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C ambient
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
T
J
= T
A
+ (P
D
• 150°C/W)
The following table lists thermal resistance for several different board sizes
and copper areas. All measurements were taken in still air on 3/32" FR-4
board with the device mounted on topside.
Note 4: Quiescent current increases with load current, refer to plot of I
QF
vs I
LOAD
.
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 6: Current into a pin is positive and current out of a pin is negative.
All voltages are referenced to GND.
R
FWD
and R
ON
vs I
LOAD
at
V
IN
= 3.6V
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.