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LTC3521 数据表(PDF) 4 Page - Linear Technology

部件名 LTC3521
功能描述  Wide VIN, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters
PDF  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3521 数据表(HTML) 4 Page - Linear Technology

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LTC3521

3521f
Typical perForMance characTerisTics
Buck-Boost Efficiency,
Li-Ion to 3.3V
Buck Efficiency, Li-Ion to 2.5V
Buck Efficiency, Li-Ion to 1.8V
Buck Burst Mode Current Threshold
Buck Switches RDS(ON)
Switching Frequency
vs Temperature
0.1
1
10
100
1000
LOAD CURRENT (mA)
3521 G01
0
20
40
60
80
100
120
140
0
20
30
40
50
60
70
80
90
100
10
Burst Mode
OPERATION
Burst Mode
POWER LOSS
VIN = 2.7V
VIN = 4.2V
PWM MODE
0.1
1
10
100
1000
LOAD CURRENT (mA)
0
20
30
40
50
60
70
3521 G02
80
90
100
0
20
40
60
80
100
120
140
10
Burst Mode
OPERATION
Burst Mode
POWER LOSS
VIN = 3.6V
VIN = 4.2V
PWM MODE
0.1
1
10
100
1000
LOAD CURRENT (mA)
0
20
30
40
50
60
70
3521 G03
80
90
100
0
20
40
60
80
100
120
140
10
Burst Mode
OPERATION
Burst Mode
POWER LOSS
PWM MODE
VIN = 2.7V
VIN = 4.2V
Buck-Boost Switches RDS(ON)
TA = 25°C, unless otherwise noted.
VIN (V)
1.5
40
50
5
30
20
2.5
3.5
2
3
4
4.5
5.5
10
0
60
3521 G04
VOUT = 2.5V
VOUT = 1.8V
VOUT = 1.2V
TEMPERATURE (°C)
–40
120
140
100
100
80
0
40
–20
20
60
120
80
20
0
60
160
40
3521 G05
PMOS
(SWITCHES A AND D)
NMOS
(SWITCHES B AND C)
VIN = 3.6V
VOUT1 = 3.3V
TEMPERATURE (°C)
–40
300
100
250
200
0
40
–20
20
60
120
80
50
0
150
350
100
3521 G06
PMOS
NMOS
VIN = 3.6V
TEMPERATURE (°C)
–50
–1.0
–0.8
–0.4
–0.2
0
1.0
0.4
–10
30 50
3521 G07
–0.6
0.6
0.8
0.2
–30
10
70 90 110



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