Datasheet

LTC3544B
15
3544bfb
applicaTions inForMaTion
16
4
1
L2
4.7µH
L1
10µH
L4
4.7µH
C6
20pF
C9
4.7µF
C10
4.7µF
C5
20pF
C8
20pF
C2
4.7µF
C1
4.7µF
V
OUT1
1.2V
C4
4.7µF
3544B F05a
V
OUT2
2.5V
R3
93.1k
V
OUT2
1.5V
V
SUPPLY
3.6V
V
OUT3
0.8V
R4
107k
R1
59k
R2
118k
R7
162k
R8
76.8k
3
5
2
12
15 7
13
11
9
8
10
14 6
L3
4.7µH
C7
20pF
C3
4.7µF
R5
0Ω
R6
100k
RUN200B
V
CC
LTC3544B
PV
IN
GNDA
17
GNDA PGND
SW200B
SW200A
V
FB200B
V
FB200A
RUN200A
RUN100
SW100
SW300
V
FB100
V
FB300
RUN300
Figure 5
LOAD CURRENT (A)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.0001 0.01 0.1 1
3544B F05b
0
0.001
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
OUT
= 2.5V
T
A
= 25°C
Efficiency vs Output Current—300mA Channel,
All Other Channels Off
Transient Response
V
OUT300
100mV/DIV
AC-COUPLED
I
L
250mA/DIV
I
LOAD
250mA/DIV
20µs/DIVV
IN
= 3.6V
V
OUT
= 2.5V
T
A
= 25°C
LOAD STEP = 300µA TO 300mA
3544B F05c