LTC1735
U
W
U U
APPLICATIO S I FOR ATIO
the INTVCC and PGND pins can help improve noise
performance.
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.
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
+
C
M1
OSC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C
TG
BOOST
SW
OSC
C
C
SS
C
IN
RUN/SS
+
C
C
R
C
I
TH
V
IN
LTC1735
C2
FCB
V
IN
C
D
B
B
D1
SGND
INTV
CC
47pF
+
4.7µF
V
BG
OSENSE
M2
–
–
SENSE
PGND
1000pF
+
SENSE
EXTV
CC
L1
–
R1
C
OUT
V
OUT
+
+
R
SENSE
R2
1735 F12
Figure 12. LTC1735 Layout Diagram
HIGH CURRENT PATH
1735 F13
CURRENT SENSE
RESISTOR
(R
SENSE
)
+
–
SENSE SENSE
Figure 13. Kelvin Sensing RSENSE
1735fc
27
Linear [ Linear ]
