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| LTC3609 Datasheet, PDF (20/24 Pages) Linear Technology – 32V, 6A Monolithic Synchronous Step-Down DC/DC Converter | |||
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LTC3609
TYPICAL APPLICATIONS
3.6V Input to 1.5V/6A at 750kHz
INTVCC
CVCC
4.7μF
6.3V
CF
0.1μF
50V
VBIAS
5V
SW
GND
40 39 38 37 36 35 34 33 32 31 30 29 28 27
VOUT
1.5V AT
6A
GND
COUT1
100μF
x2
L1
0.5μH
VIN
VIN
3.6V
CIN
4.7μF
50V
x2
41 SW
42 SW
43
SW
44 SW
45 SW
46 SW
47 SW
48 PVIN
49
PVIN
50
PVIN
51
PVIN
52 PVIN
LTC3609
SGND 26
NC 25
24
NC
VFB 23
ION 22
NC 21
SGND 20
FCB 19
18
ITH
17
VRNG
16
PGOOD
SGND 15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CIN: MURATA GRM32ER71H475K
COUT: MURATA GRM435R60J167M
LI: CDEP850R5MC-125
KEEP POWER GROUND AND SIGNAL
GROUND SEPARATE. CONNECT AT
ONE POINT.
2Ω
SW
INTVCC
DB
CMDSH-3
CB1
0.22μF
SW
CSS
0.1μF
CVON
0.1μF
EXTVCC
C4
0.01μF
R2
60.4k
1%
R1
40.2k
1%
VOUT
RON
113k
1%
VIN
INTVCC
JP1
R5
CC1
1500pF
8.45k
RPG1
100k
CC2
100pF
PGOOD
SGND
INTVCC
VOUT
3609 TA02
IL
5A/DIV
Transient Response
VOUT
200mV/DIV
20μs/DIV
LOAD STEP 1A TO 5A
VIN = 3.6V
VOUT = 1.5V
FCB = 0V
3609 TA02b
20
100
95
90
85
80
75
70
65
60
55
50
0.01
Efï¬ciency vs Load Current
VIN = 3.6V
FREQUENCY = 750kHz
0.1
1
LOAD CURRENT (A)
10
3609 TA02c
3609f
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