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LTC3522 데이터시트(PDF) 18 Page - Linear Technology

부품명 LTC3522
상세설명  Synchronous 400mA Buck-Boost and 200mA Buck Converters
PDF  20 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC3522 데이터시트(HTML) 18 Page - Linear Technology

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LTC3522
18
3522f
TYPICAL APPLICATION
Li-Ion to 3V at 400mA and 1.2V at 200mA
+
PVIN1 PVIN2
SW2
FB2
VOUT1
LTC3522
PGOOD2
1M
102k
12pF
100k
C2
4.7
μF
C1
10
μF
C3
4.7
μF
Li-Ion
L2
4.7
μH
L1
6.8
μH
VOUT1
3V
300mA
(400mA, VIN > 3V)
C1: MURATA GRM219R61A475K (0805 PACKAGE)
C2, C3: MURATA GRM21BR60J106K (0805 PACKAGE)
L1: TAIYO YUDEN NPO35B-6R8M
L2: TAIYO YUDEN NPO35B-4R7M
VOUT2
1.2V
200mA
COMBINED
PGOOD
OUTPUT
VIN
2.4V TO 4.2V
499k
3522 TA02
PGOOD1
PWM
SW1A
SW1B
FB1
SHDN2
SHDN1
PGND1 GND1 PGND2
499k
ON
OFF
PWM
BURST
Buck-Boost Converter Efficiency vs Load Current
Buck Converter Efficiency vs Load Current
LOAD CURRENT (mA)
1
20
30
40
50
60
70
10
100
3522 TA02b
80
90
100
1000
VIN = 4.2V
VIN = 2.7V
Burst Mode
OPERATION
PWM Mode
LOAD CURRENT (mA)
1
30
40
50
60
70
10
100
3522 TA02c
80
90
100
1000
VIN = 4.2V
VIN = 2.7V
Burst Mode
OPERATION
PWM Mode



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