Datasheet

LTC3735
9
3735fa
FUNCTIONAL DIAGRAM
SWITCH
LOGIC
0.60V
5V
PV
CC
CLK2
TO SECOND
CHANNEL
CLK1
+
–
V
REF
SGND
+
SW
SHDN
TOP
BOOST
TG
C
B
C
IN
D1
D
B
PGND
BOT
BG
PV
CC
MD
RBOOTDPRSLPVR
RDPRSLP
COMPOSITE PG
PV
CC
V
IN
+
3735 FD
V
FB
DROP
OUT
DET
RUN
SOFT-
START
BOT PSI
TOP ON
S
R
Q
Q
OSCILLATOR
110µs BLANKING
FREQSET
R3
EA
0.66V
1.5V
0.60V
OV
1.5µA
6V
–
+
R
C
5.33(V
FB
)
RST
RUN
SHDN
RUN/SS
I
TH
C
C
C
SS
5.33(V
FB
)
SLOPE
COMP
+
–
+
–
SENSE
–
SENSE
+
PV
CC
36k
54k
2.4V
54k
R
SENSE
36k
I
1
I
2
V
FB
R
ATTEN
5.33k
R
VID
DPRSLPVR
MD
VID0
VID CHANGE
VID1 VID2 VID3 VID4 VID5
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
C
C2
+– +–
C
OUT
V
OUT
+
A1
R2
R1
+
–
OAOUT
V
OA
–
V
OA
+
0.54V
0.66V
+
–
+
–
V
FB
PGOOD
RUN
STP_CPUB
–
+
6-BIT VID DECODER
–
+
0.5µA
PSI
3V
PSIB
DPRSLPVR
VID CHANGE
DELAY
STP_CPUBRDPSLP
R4 R6 R5
MCH_PG
DPRSLPVR
L