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.
No Load Quiescent Current
vs VIN
60
55
Buck-Boost Load Step,
0mA to 750mA
VOUT
100mV/DIV
VIN = 3.6V, VOUT = 3.3V
L = 4.7µH
COUT = 22µF
50
45
40
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VIN (V)
3521 G14
INDUCTOR
CURRENT
500mA/DIV
100µs/DIV
3521 G15
Buck-Boost Burst Mode Operation
to PWM Transition
Buck Load Step, PWM Mode,
10mA to 400mA
INDUCTOR
CURRENT
200mA/DIV
VOUT
100mV/DIV
Buck Load Step, Burst Mode,
10mA to 400mA
VOUT
100mV/DIV
VOUT
20mV/DIV
50µs/DIV
VIN = 3.6V L = 4.7µH
VOUT = 3.3V COUT = 22µF
INDUCTOR
CURRENT
200mA/DIV
3521 G16
VIN = 3.6V
VOUT = 1.8V
100µs/DIV
L = 4.7µH
COUT = 10µF
INDUCTOR
CURRENT
200mA/DIV
3521 G17
VIN = 3.6V
VOUT = 1.8V
100µs/DIV
L = 4.7µH
COUT = 10µF
3521 G18
Buck-Boost Current Limit
vs Temperature
2150
Buck-Boost Peak Current Limit
vs Temperature
3350
Buck Current Limit
vs Temperature
1150
2100
2050
2000
3300
3250
1100
1050
1000
950
1950
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3521 G19
3200
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3521 G20
900
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3521 G21
3521fb
6
For more information www.linear.com/LTC3521
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