ltc3608ewkg Linear Technology Corporation, ltc3608ewkg Datasheet - Page 22

• Manufacturer Part Number: ltc3608ewkg
• Description: 18v, 8a Monolithic Synchronous Step-down Dc/dc Converter
• Manufacturer: Linear Technology Corporation

LTC3608
TYPICAL APPLICATIONS
22
1.8V AT
V
GND
OUT
8A
(OPTIONAL)
5V TO 18V
C
L1: VISHAY IHLP2525-R47
C5: TAIYO YUDEN JMK316BJ226ML-T
KEEP POWER GROUND AND SIGNAL GROUND SEPARATE.
CONNECT AT ONE POINT.
OUT
22μF
10μF
6.3V
25V
C
200mV/DIV
C5
3×
= PGND
= SGND
IN
: TDKC3225XROJ107M
V
IN
5A/DIV
V
OUT
I
L
C
100μF
LOAD STEP 1A-5A
V
V
FCB = 0V
IN
OUT
OUT1
×2
= 12V
= 1.8V
+
Transient Response
0.47μH
L1
V
200mV
IN
PGND
41
42
43
44
45
46
47
48
49
50
51
52
SW
SW
SW
SW
SW
SW
SW
PV
PV
PV
PV
PV
IN
IN
IN
IN
IN
40 39 38 37 36 35 34 33 32 31 30 29 28 27
1
2
3608 TA04a
5V to 18V Input to 1.8V/8A All Ceramic 1MHz
3
INTV
4
CC
5
4.7μF
C
6.3V
CMDSH-3
VCC
6
D
B
LTC3608
7
8
SW
INTV
9 10 11 12 13 14
C
0.22μF
B1
CC
C
0.1μF
C
0.1μF
25V
SS
F
PGOOD
SGND
SGND
SGND
R
1Ω
V
F1
FCB
RNG
V
I
I
NC
NC
NC
ON
TH
FB
90
80
70
60
50
40
30
26
25
24
23
22
21
20
19
18
17
16
15
100
V
IN
DCM
(OPTIONAL)
Effi ciency vs Load Current
R
510k
SS1
SGND
R1
10k
1%
LOAD CURRENT (mA)
C4
0.01μF
R
100k
V
PG1
IN
EXTV
1000
CCM
(OPTIONAL)
C1
C
0.01μF
CC
ON
INTV
V
OUT
CC
(OPTIONAL)
0.1μF
102k
V
R
1%
IN
ON
5.76k
3608 TA04b
= 12V
R5
10000
R2
30.1k
1%
1500pF
100pF
C
C
C1
C2
(OPTIONAL)
3608 TA04
C2
V
V
SGND
V
3608fa
OUT
IN
OUT