LTC3403EDD View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3403EDD Datasheet PDF : 16 Pages
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LTC3403
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3403E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
LTC3403: TJ = TA + (PD)(43°C/W)
Note 4: When VREF > 1.2V and VREF x3 > VIN, the P-channel FET will be on
in parallel with the bypass PFET reducing the overall RDS(ON).
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.
TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1a)
Efficiency vs VIN
100
95 IL = 100mA
90 IL = 300mA
85
80 IL = 600mA
75
70
65
IL = 10mA
60
55
50
2.5
3.0
3.5
VIN (V)
4.0
4.5
3403 G01
Efficiency vs Output Current
100
90
VIN = 3.6V
80
70
VIN = 4.2V
60
VIN = 3.6V VIN = 4.2V
50
40
30
20
10
0
0.1
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 1.5V
1
10
100
OUTPUT CURRENT (mA)
1000
3403 G03
Efficiency vs VOUT
100
100mA BURST
MODE 0PERATION
90
100mA FORCED
80
CONTINUOUS MODE
70
600mA FORCED
CONTINUOUS MODE
60
50
40
0
TA = 25°C
VIN = 3.6V
1
2
3
4
VOUT (V)
3403 GO1a
Efficiency vs Output Current
100
90 VIN = 3.6V
80
VIN = 4.2V
70
60
50
40
30
20
10
0
0.1
VIN = 3.6V VIN = 4.2V
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 2.5V
1
10
100
OUTPUT CURRENT (mA)
1000
3403 G04
Efficiency vs Output Current
100
90
VIN = 3.6V
80
70
VIN = 4.2V
VIN = 3.6V
60
VIN = 4.2V
50
40
30
20
10
0
0.1
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 1.2V
1
10
100
OUTPUT CURRENT (mA)
1000
3403 G02
Oscillator Frequency
vs Temperature
1.70
VIN = 3.6V
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3403 G05
3403f
3
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