Datasheet

28
LTC1735
1735fc
TYPICAL APPLICATIO S
U
1.8V/5A Converter from Design Example with Burst Mode Operation Disabled
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C
OSC
RUN/SS
I
TH
FCB
SGND
V
OSENSE
SENSE
–
SENSE
+
TG
BOOST
SW
V
IN
INTV
CC
BG
PGND
EXTV
CC
LTC1735
C
SS
0.1µF
C
B
0.1µF
C
C2
220pF
47pF
C
C
470pF
R
C
33k
R
SENSE
0.01Ω
V
OUT
1.8V
5A
1000pF
C
OSC
43pF
+
4.7µF
+
C
OUT
150µF
6.3V
×2
PANASONIC SP
C
IN
22µF
50V
CER
M1
Si4412DY
M2
Si4410DY
C
OUT
: PANASONIC EEFUEOG151R
C
IN
: MARCON THCR70LE1H226ZT
L1: PANASONIC ETQP6F3R3HFA
R
SENSE
: IRC LR 2010-01-R010F
1735 TA02
D
B
CMDSH-3
R2
32.4k
1%
R1
25.5k
1%
MBRS140T3
V
IN
4.5V TO 22V
L1
3.3µH
OPTIONAL:
CONNECT TO 5V
SGND
CPU Core Voltage Regulator for 2-Step Applications (V
IN
= 5V)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C
OSC
RUN/SS
I
TH
FCB
SGND
V
OSENSE
SENSE
–
SENSE
+
TG
BOOST
SW
V
IN
INTV
CC
BG
PGND
EXTV
CC
LTC1735
C
SS
0.1µF
C
B
0.22µF
C
C2
220pF
47pF
C
C
220pF
R
C
20k
100k*
*OPTIONAL TO DEFEAT OVERCURRENT LATCHOFF
R
SENSE
0.004Ω
V
OUT
1.5V
12A
1000pF
C
OSC
39pF
+
4.7µF
1µF
100pF
+
+
C
OUT
180µF
4V
×3
C
O
47µF
10V
C
IN
150µF
6.3V
×2
M1
FDS6680A
M2, M3
FDS6680A
×2
C
OUT
: PANASONIC EEFUEOG181R
C
IN
: PANASONIC EEFUEOJ151R
C
O
: TAIYO YUDEN LMK550BJ476MM-B
L1: COILCRAFT 1705022P-781HC
R
SENSE
: IRC LRF 2512-01-R004-J
1735 TA03
D
B
MBR0530
R2
22.6k
1%
R1
25.5k
1%
MBRD835L
V
IN
5V
L1
0.78µH
V
IN
SGND