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LTC3545 Datasheet(PDF) 17 Page - Linear Technology

Part # LTC3545
Description  Triple 800mA Synchronous Step-Down Regulator-2.25MHz
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3545 Datasheet(HTML) 17 Page - Linear Technology

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LTC3545/LTC3545-1
17
35451fb
TYPICAL APPLICATIONS
Burst Mode Ripple
Overall Efficiency vs
Channel 1 Load Current
Figure 4. LTC3545 Low Ripple Burst Mode Operation
CHANNEL 1 LOAD CURRENT (mA)
30
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3545 TA03
0
1
TA = 25°C
VIN = 3.6V
VOUT = 2.5V
fOSC = 2.25MHz
CHANNEL 2 = 1.2V, ILOAD = 400mA
CHANNEL 3 = 1.5V, ILOAD = 400mA
1μs/DIV
IL3
250mA/DIV
VOUT3
AC COUPLED
20mV/DIV
SW3
2V/DIV
3545 TA04
TA = 25°C
VIN = 3.6V
VOUT = 1.5V
ILOAD = 50mA
fOSC = 2.25MHz
3545 TA02
L1
1.5μH
R1
511k
C2
10μF
6.3V
C1
10μF
10V
SW1
PGOOD1
RUN2
PGOOD2
SW2
PGND
PVIN
SW3
GNDA
VIN
RUN1
VFB1
VFB2
VFB3
RUN3
SYNC/MODE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC3545
GND
17
R3
191k
C6
20pF
R4
60.4k
R5
100k
R6
100k
R7
165k
R8
110k
R2
511k
VIN
2.7V TO 5.5V
C5
4.7μF
E3
VOUT1
E2
PGOOD2
E1
PGOOD1
2.5V AT 0.8A
E4
GND
C3
10μF
6.3V
E7
VOUT2
1.2V AT 0.8A
E6
GND
C4
10μF
6.3V
E5
VOUT3
1.5V AT 0.8A
E8
GND
L2
1.5μH
L3
1.5μH
C7
20pF
C8
20pF



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