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| LTC3608 Datasheet, PDF (20/24 Pages) Linear Technology – 18V, 8A Monolithic Synchronous Step-Down DC/DC Converter | |||
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LTC3608
TYPICAL APPLICATIONS
3.6V Input to 1.5V/8A at 750kHz
PGND
INTVCC
CVCC
4.7μF
6.3V
SW
CF
0.47μF
25V
40 39 38 37 36 35 34 33 32 31 30 29 28 27
VIN2 = 5V
EXTVCC
C4
0.01μF
SGND
VOUT
1.5V AT
8A
C5
22μF
6.3V
(OPTIONAL)
GND
COUT1 +
100μF
Ã2
L1
0.2μH
VIN
3.6V
CIN
10μF
3Ã
VIN
GND
C6 +
10μF
10V
(OPTIONAL)
41
SW
42 SW
43 SW
44 SW
45
SW
46 SW
47 SW
48 PVIN
49 PVIN
50 PVIN
51 PVIN
52 PVIN
LTC3608
26
SGND
NC 25
NC 24
23
VFB
22
ION
NC 21
SGND 20
FCB 19
ITH 18
VRNG 17
PGOOD 16
SGND 15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CIN: TAIYO YUDEN TMK432BJ106MM
COUT1: TDKC4532X5ROJ107M
L1: CDEP85NP-R20MC-50
C5: TAIYO YUDEN JMK316BJ226ML-T
KEEP POWER GROUND AND SIGNAL GROUND SEPARATE.
CONNECT AT ONE POINT.
INTVCC
CB1
0.22μF
CSS
0.1μF
R1
20.5k
1%
R2
C1
30.1k
1%
(OPTIONAL) RON
113k
1%
CON
0.01μF
(OPTIONAL)
(OPTIONAL)
C2
VOUT
VIN
R5
6.19k
CC1
3300pF
39.2k
INTVCC
11k
RPG1
100k
INTVCC
CC2
100pF
RSS1
510k
VIN
(OPTIONAL)
VOUT
0.1μF
SGND
VOUT
3608 TA02
= PGND
= SGND
Transient Response
IL
5A/DIV
VOUT
200mV/DIV
200mV
LOAD STEP 1A-8A
VIN = 3.6V
VOUT = 1.5V
FCB = 0V
3608 TA02a
100
95
90
85
80
75
70
65
60
55
50
100
Efï¬ciency Curve
DCM
CCM
VIN = 3.6V
FREQ = 750kHz
1000
1000
LOAD CURRENT (A)
10000
3608 TA02b
3608fa
20
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