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LTC3403 数据表(PDF) 3 Page - Linear Technology

部件名 LTC3403
功能描述  1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3403 数据表(HTML) 3 Page - Linear Technology

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LTC3403
3403f
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs VIN
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
Oscillator Frequency
vs Temperature
(From Figure 1a)
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3403 G02
0
1
VIN = 3.6V
VIN = 3.6V
VIN = 4.2V
VIN = 4.2V
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 1.2V
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3403 G03
0
1
VIN = 3.6V
VIN = 3.6V
VIN = 4.2V
VIN = 4.2V
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 1.5V
TEMPERATURE (
°C)
–50
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
25
75
–25
0
50
100
125
VIN = 3.6V
3403 G05
VIN (V)
2.5
55
50
65
70
75
100
85
3.0
3.5
3403 G01
60
90
95
80
4.0
4.5
IL = 300mA
IL = 600mA
IL = 100mA
IL = 10mA
OUTPUT CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3403 G04
0
1
VIN = 3.6V
VIN = 3.6V
VIN = 4.2V
VIN = 4.2V
TA = 25°C
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
VOUT = 2.5V
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.
ELECTRICAL CHARACTERISTICS
VOUT (V)
0
100
90
80
70
60
50
40
12
3
4
3403 GO1a
TA = 25°C
VIN = 3.6V
100mA BURST
MODE 0PERATION
600mA FORCED
CONTINUOUS MODE
100mA FORCED
CONTINUOUS MODE
Efficiency vs VOUT



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