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LTC3549 Scheda tecnica(PDF) 4 Page - Linear Technology

Il numero della parte LTC3549
Spiegazioni elettronici  250mA Low VIN Buck Regulator
PDF  16 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC3549 Scheda tecnica(HTML) 4 Page - Linear Technology

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LTC3549
4
3549f
INPUT VOLTAGE (V)
30
90
100
20
10
80
50
70
60
40
3549 G03
0
1.5
2.5
3.5
4.5
5.5
0.1mA
1mA
IOUT:
10mA
100mA
300mA
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G04a
0
1
0.1
0.01
0.001
0.0001
1
VIN = 2.5V
VIN = 3.6V
VIN = 4.2V
VIN = 3.6V
EFFICIENCY
POWER LOSS
L = 4.7
µH
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G04b
0
1
VIN = 2.5V
VIN = 3.6V
VIN = 4.2V
EFFICIENCY
L = 4.7
µH
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G05a
0
1
VIN = 1.6V
VIN = 2.5V
VIN = 3.1V
TEMPERATURE (ºC)
–50
0.6069
0.6090
0.6111
0.6132
–25
0
25
50
3549 G06
75
100
125
VIN = 1.6V
VIN = 2.2V
VIN = 4.2V
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G05b
0
1
VIN = 1.6V
VIN = 2.5V
VIN = 3.1V
INPUT VOLTAGE (V)
30
90
100
20
10
80
50
70
60
40
3549 G02
0
1.5
2.5
3.5
4.5
5.5
0.1mA
1mA
10mA
100mA
300mA
IOUT:
Efficiency/Power Loss vs Load
Current, VOUT = 1.5V, Burst Mode
Efficiency/Power Loss vs Load
Current, VOUT = 1.5V, Pulse Skip
Efficiency vs Input Voltage
VOUT = 1.2V, Burst Mode Operation
Efficiency vs Input Voltage
VOUT = 1.2V, Pulse Skip
Efficiency vs Load Current
VOUT = 1.8V, Burst Mode
Efficiency vs Load Current
VOUT = 1.8V, Pulse Skip
TYPICAL PERFOR A CE CHARACTERISTICS
(From Typical Application on the front page, except for the resistive divider resistor values)
Efficiency vs Load Current
VOUT = 1.2V, Burst Mode
Efficiency vs Load Current
VOUT = 1.2V, Pulse Skip
Reference Voltage
vs Temperature
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G01a
0
1
0.1
0.01
0.001
0.0001
1
VIN = 1.8V
VIN = 2.5V
VIN = 3.1V
VIN = 1.8V
VIN = 2.5V
VIN = 3.1V
EFFICIENCY
POWER LOSS
LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3549 G01b
0
1
0.1
0.01
0.001
0.0001
1
VIN = 1.8V
VIN = 2.5V
VIN = 3.1V
VIN = 1.8V
VIN = 2.5V
VIN = 3.1V
EFFICIENCY
POWER LOSS



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