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