Datasheet

27
LTC1735
1735fc
APPLICATIO S I FOR ATIO
WUU
U
Figure 12. LTC1735 Layout Diagram
Figure 13. Kelvin Sensing R
SENSE
the INTV
CC
and PGND pins can help improve noise
performance.
6) Keep the switching node (SW), top gate node (TG) and
boost node (BOOST) away from sensitive small-signal
nodes, especially from the voltage and current sensing
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
C
C2
C
C
R
C
47pF
1000pF
+
C
OUT
C
OSC
R1
R2
C
B
D
B
R
SENSE
D1
M2
+
4.7µF
M1
+
C
IN
+
–
L1
V
IN
–
+
V
OUT
1735 F12
SENSE
+
SENSE
–
HIGH CURRENT PATH
1735 F13
CURRENT SENSE
RESISTOR
(R
SENSE
)
feedback pins. All of these nodes have very large and fast
moving signals and therefore should be kept on the
“output side” (Pin 9 to Pin 16) of the LTC1735 and occupy
minimum PC trace area.