Datasheet

LTC3809-1
21
38091fc
TYPICAL APPLICATIONS
Figure 8. 550kHz, Synchronous DC/DC Converter with Internal Soft-Start
V
OUT
2.5V
(5A AT 5V
IN
)
V
IN
2.75V TO 8V
C
OUT
150μF
L: VISHAY IHLP-2525CZ-01
C
OUT
: SANYO 4TPB150MC
C
ITH
220pF
R
ITH
15k
10μF
MP
Si7540DP
MN
Si7540DP
1
2
6
4
3
9
8
10
7
5
11
L
1.5μH
187k
59k
100pF
MODE
TRACK/SS
IPRG
TG
SW
BG
RUN
GND
LTC3809EDD-1
+
38091 F08
V
IN
V
FB
I
TH
Figure 9. 550kHz, Synchronous DC/DC Converter with External Soft-Start, Ceramic Output Capacitor
V
OUT
1.8V
2A
10μF
MP
Si3447BDV
MN
Si3460DV
1
6
4
2
3
9
8
10
7
5
11
L
1.5μH
15k
118k
59k
470pF
10nF
100pF
MODE
IPRG
TRACK/SS
TG
SW
BG
RUN
GND
38091 F09
L: VISHAY IHLP-2525CZ-01
D: ON SEMI MBRM120LT3 (OPTIONAL)
V
IN
2.75V TO 8V
C
OUT
22μF
x2
V
IN
I
TH
V
FB
LTC3809EDD-1
D
(OPT)