Datasheet

LTC3609
22
3609fb
Typical applicaTions
5V to 32V Input to 1.2V/6A at 550kHz
V
OUT
1.2V AT
6A
GND
V
IN
V
IN
5V TO 32V
C
OUT1
100µF
x2
L1
0.8µH
C
IN
4.7µF
50V
x2
LTC3609
SGND
26
NC
25
NC
24
V
FB
23
I
ON
22
NC
21
SGND
20
FCB
19
I
TH
18
V
RNG
17
PGOOD
16
SGND
15
SGND
GND
V
OUT
PV
IN
1
PV
IN
2
PV
IN
3
PV
IN
4
PV
IN
5
PV
IN
6
PV
IN
7
SW
SW
SW
SW
8
NC
9
SGND
10
BOOST
11
RUN/SS
12
V
ON
13
SGND
14
PGND
40
PGND
39
PGND
38
PGND
37
PGND
36
PGND
35
PGND
34
SW
33
INTV
CC
INTV
CC
INTV
CC
32
INTV
CC
PGOOD
31
SV
IN
V
IN
30
EXTV
CC
29
NC
28
SGND
27
SW
41
SW
42
SW
43
SW
44
SW
45
SW
46
SW
47
PV
IN
48
PV
IN
49
PV
IN
50
PV
IN
51
PV
IN
52
3609 TA03
C
F
0.1µF
25V
R
F1
1Ω
C
VCC
4.7µF
6.3V
EXTV
CC
C4
0.01µF
INTV
CC
INTV
CC
JP1
C
B1
0.22µF
D
B
CMDSH-3
C
SS
0.1µF
V
IN
C
VON
0.1µF
R1
60.4k
1%
R
PG1
100k
R
ON
182k
1%
R2
60.4k
1%
R5
8.45k
C
C1
1500pF
C
C2
100pF
V
OUT
C5: TAIYO YUDEN JMK316BJ226ML-T
C
IN
: MURATA GRM32ER71H475K
C
OUT
: MURATA GRM435R60J167M
L
I
: CDEP850R8MC-88
2Ω
R3
0Ω
KEEP POWER GROUND AND SIGNAL
GROUND SEPARATE. CONNECT AT
ONE POINT.
LOAD CURRENT (A)
0.01
EFFICIENCY (%)
80
10
3609 TA02c
50
75
70
65
60
55
0.1 1
90
85
V
IN
= 12V
FREQUENCY = 550kHz
LOAD STEP 1A TO 6A
V
IN
= 12V
V
OUT
= 1.2V
FCB = 0V
3609 TA02b
20µs/DIV
V
OUT
200mV/DIV
I
L
5A/DIV
Transient Response Efficiency vs Load Current