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LTC3522 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3522
Description  Synchronous 400mA Buck-Boost and 200mA Buck Converters
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3522 Datasheet(HTML) 5 Page - Linear Technology

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LTC3522
5
3522f
Buck-Boost Feedback Voltage vs
Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
Buck Feedback Voltage vs
Temperature
Buck-Boost Maximum Load
Current, Burst Mode Operation
No Load Quiescent Current
vs VIN
Buck-Boost Burst to PWM
Transition
Buck Load Step, PWM Mode,
5mA to 200mA
TEMPERATURE (
°C)
–40
0.1
0.3
0.5
120
3522 G09
–0.1
–0.3
0
0.2
0.4
–0.2
–0.4
–0.5
0
–20
40
20
80 100
140
60
TEMPERATURE (
°C)
–40
0.1
0.3
0.5
120
3522 G09
–0.1
–0.3
0
0.2
0.4
–0.2
–0.4
–0.5
0
–20
40
20
80 100
140
60
VIN (V)
2.4
0
10
30
40
50
4.4
90
3522 G11
20
3.4
2.9
4.9
5.4
3.9
60
70
80
VOUT = 3V
VOUT = 5V
L = 4.7
μH
Buck-Boost Maximum Load
Current, PWM Mode
VIN (V)
2.4
0
100
300
400
500
4.4
600
3522 G12
200
3.4
2.9
4.9
5.4
3.9
VOUT = 3.3V
L = 4.7
μH
VOUT = 5V
VIN (V)
2.4
0
5
15
20
25
50
35
3.4
4.4
4.9
3522 G13
10
40
45
30
2.9
3.9
5.4
BOTH CONVERTERS ENABLED
INDUCTOR
CURRENT
200mA/DIV
VOUT
100mV/DIV
50
μs/DIV
3522 G14
VIN = 3.6V
VOUT = 3.3V
L = 4.7
μH
COUT = 4.7μF
Buck-Boost Load Step,
0mA to 300mA
INDUCTOR
CURRENT
200mA/DIV
VOUT
100mV/DIV
100
μs/DIV
3522 G15
VIN = 3.6V
VOUT = 3V
L = 4.7
μH
COUT = 4.7μF
INDUCTOR
CURRENT
100mA/DIV
VOUT
100mV/DIV
100
μs/DIV
3522 G16
VIN = 3.6V
VOUT = 1.8V
L = 4.7
μH
COUT = 4.7μF
Buck Load Step, Burst Mode
Operation, 5mA to 200mA
INDUCTOR
CURRENT
100mA/DIV
VOUT
100mV/DIV
100
μs/DIV
3522 G17
VIN = 3.6V
VOUT = 1.8V
L = 4.7
μH
COUT = 4.7μF
(TA = 25°C unless otherwise noted)



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