LTC3521IFE Просмотр технического описания (PDF) - Linear Technology
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LTC3521IFE Datasheet PDF : 22 Pages
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LTC3521
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Buck-Boost Switches RDS(ON)
vs Temperature
160
VIN = 3.6V
140 VOUT1 = 3.3V
120
PMOS
(SWITCHES A AND D)
100
NMOS
80
(SWITCHES B AND C)
60
40
20
0
–40 –20
0 20 40 60 80
TEMPERATURE (°C)
100 120
3521 G05
Switching Frequency vs VIN
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VIN (V)
3521 G08
Burst Mode Quiescent Current
vs VIN
33
ALL THREE CONVERTERS ENABLED
31
29
27
25
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VIN (V)
3521 G11
Buck Switches RDS(ON)
vs Temperature
350
VIN = 3.6V
300
PMOS
250
NMOS
200
150
100
50
0
–40 –20
0 20 40 60 80
TEMPERATURE (°C)
100 120
3521 G06
Buck-Boost Feedback Voltage
vs Temperature
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–40 –20
0 20 40 60 80
TEMPERATURE (°C)
100 120
3521 G09
Buck-Boost Maximum Load Current
vs VIN, Burst Mode Operation
90
80
VOUT = 3V
70
60
50
VOUT = 5V
40
30
20
10
0
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VIN (V)
3521 G12
For more information www.linear.com/LTC3521
Switching Frequency
vs Temperature
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50 –30 –10 10 30 50 70 90 110
TEMPERATURE (°C)
3521 G07
Buck Feedback Voltage
vs Temperature
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3521 G10
Buck-Boost Maximum Load
Current vs VIN, PWM Mode
1500 L = 4.7µH
1300
1100
VOUT = 3.3V
900
700
VOUT = 5V
500
300
100
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VIN (V)
3521 G13
3521fb
5
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