LTC3546 Linear Technology, LTC3546 Datasheet - Page 24

• Manufacturer Part Number: LTC3546
• Description: 3A/1A or 2A/2A Configurable Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

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APPLICATIONS INFORMATION
LTC3546
24
2.5V/2A
5V V
V
OUT2
IN
2.25V TO 5.5V
1.8V, 2A
C5
22μF, X5R
C1
22μF, X5R
V
2
C
OUT2
OUT2
47μF
V
IN
R1
316k
R3
100k
R7
100k
R8
100k
22μF
f
C
SW
100pF
60.4k
C
IN
R3
FF2
R9
90.9k
= 2.25MHz
30.1k
Figure 8. A 2.25MHz Fixed Frequency 2A/2A Regulator
R4
0.56μH
R6
5.1k
L2
Figure 7. Typical Schematic for 2A/2A Regulator
C6
10pF
C4
470pF
1.0μH
L1
1000pF
C
100k
R
ITH2
R5
ITH2
13k
V
V
IN
C9
0.1μF
IN
EXPOSED PAD
RUN2
PGOOD2
SYNC/MODE
SW2A
SW2B
V
FREQ
I
TRACK/SS2
TH2
SYNC/MODE
PGOOD2
SW2A
SW2B
RUN2
V
BMC2
TRACK/SS2
PHASE
I
TH2
FB2
PGND2
FB2
V
BMC2
IN1
V
LTC3546
CCA
LTC3546
GND
GNDA
V
CC
V
TRACK/SS1
CCD
TRACK/SS1
PGOOD1
BMC1
PGOOD1
PGND1
PHASE
SW1D
V
RUN1
SW1D
BMC1
RUN1
SW1
V
IN2
FREQ
I
3546 F08
SW1
V
TH1
I
FB1
TH1
FB1
V
V
R6
100k
R
13k
IN
IN
C8
0.1μF
ITH1
C
1000pF
1.0μH
ITH1
L2
0.56μH
R5
8.2k
L1
C3
330pF
R2
30.1k
R
143k
FREQ
C7
33pF
100pF
30.1k
C
R1
FF1
R2
200k
R4
100k
3546 F07
C
47μF
V
1.2V, 2A
OUT1
OUT1
C2
22μF, X5R
2
V
1.8V/2A
OUT1
3546fb