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LTC3565 데이터시트(PDF) 18 Page - Linear Technology

부품명 LTC3565
상세설명  1.25A, 4MHz, Synchronous Step-Down DC/DC Converter
PDF  22 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC3565 데이터시트(HTML) 18 Page - Linear Technology

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background image
LTC3565
18
3565fb
SVIN
LTC3565
PGOOD
PGOOD
SW
PVIN
SYNC/MODE
VFB
ITH
SHDN/RT
L1
2.2μH
VIN
2.5V TO
5.5V
VOUT
1.8V/1.5V/1.2V
AT 1.25A
R5
100k
R4
191k
R1A
147k
R3
12.1k
RS1
1M
BM
RS2
1M
3565 TA02a
C3
680pF
C4 22pF
R2 294k
C2
22μF
R1B
196k
R1C
294k
PS
FC
C1
22μF
GND
NOTE: IN DROPOUT, THE OUTPUT TRACKS THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A914BYW-2R2M (D52LC SERIES)
1.8V
1.5V
1.2V
General Purpose Buck Regulator Using Ceramic Capacitors
Efficiency vs Output Current
TYPICAL APPLICATION
OUTPUT CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
3565 TA02b
Burst Mode
OPERATION
VIN = 3.6V
VOUT = 1.2V
fO = 1MHz
FORCED CONTINUOUS
PULSE SKIP
VIN = 3.6V
VOUT = 1.2V
ILOAD = 100mA TO 1.25A
Burst Mode OPERATION
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
3565 TA02c
40μs/DIV
ILOAD
1A/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 100mA TO 1.25A
PULSE SKIPPING MODE
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
3565 TA02d
40μs/DIV
ILOAD
1A/DIV



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