Datasheet

17
LTC1435
TYPICAL APPLICATIONS
U
3.3V/4.5A Converter with Foldback Current Limiting
C
OSC

RUN/SS
I
TH

SFB
SGND
V
OSENSE

SENSE
–

SENSE
+
TG
BOOST
SW
V
IN

INTV
CC

BG
PGND
EXTV
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1435
1000pF
C
C1

330pF
C
C2

51pF
100pF
R
C

10k
C
OSC

68pF
C
SS

0.1µF
+
4.7µF
CMDSH-3
0.1µF
M1
Si4410DY
M2
Si4410DY
LTC1435 • TA01
INTV
CC
+
C
IN

22µF
35V
× 2
MBRS140T3
L1
10µH
OPTIONAL:
CONNECT TO 5V
R
SENSE

0.025Ω
R1
35.7k
1%
R2
20k
1%
+
C
OUT

100µF
10V
× 2
SGND
(PIN 5)
V
OUT

3.3V/4.5A
V
IN
4.5V TO 28V
100pF
IN4148
I
TH
PIN 3
Dual Output 5V and 12V Application
C
OSC

RUN/SS
I
TH

SFB
SGND
V
OSENSE

SENSE
–

SENSE
+
TG
BOOST
SW
V
IN

INTV
CC

BG
PGND
EXTV
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1435
1000pF
C
C1

510pF
C
C2

51pF
100pF
R
C

10k
C
OSC

68pF
C
SS

0.1µF
+
4.7µF
CMDSH-3
0.1µF
M1
IRF7403
M2
IRF7403
LTC1435 • TA02
100Ω
100Ω
+
C
IN

22µF
35V
× 2
MBRS140T3
T1
10µH
1:2.2
R
SENSE

0.033Ω
R1
35.7k
1%
R2
20k
1%
+
C
OUT

100µF
10V
× 2
SGND
V
OUT

5V/3.5A
V
IN
5.4V TO 28V
MBRS1100T3
+
C
SEC

3.3µF
25V
10k
T1: DALE LPE6562-A092
90.9k
V
OUT2
12V
24V