Datasheet

LTC3707
9
3707fb
FUNCTIONAL DIAGRAM
SWITCH
LOGIC
–
+
0.8V
4.8V
5V
V
IN
4.5V
BINH
CLK2
CLK1
0.18µA
R6
R5
+
–
FCB
+
–
–
+
–
+
–
+
V
REF
INTERNAL
SUPPLY
3.3V
OUT
V
SEC
3V
FCB
PGOOD
EXTV
CC
INTV
CC
SGND
STBYMD
+
5V
LDO
REG
SW
SHDN
0.55V
TOP
BOOST
TG
C
B
C
IN
D
1
D
B
PGND
BOT
BG
INTV
CC
INTV
CC
V
IN
+
C
SEC
C
OUT
V
OUT
3707 FD/F02
D
SEC
R
SENSE
R2
+
V
OSENSE
DROP
OUT
DET
RUN
SOFT-
START
BOT
TOP ON
S
R
Q
Q
OSCILLATOR
FREQSET
FCB
EA
0.86V
0.80V
OV
V
FB
1.2µA
6V
R1
–
+
+
–
0.74V
0.86V
V
FB
+
–
R
C
4(V
FB
)
RST
SHDN
RUN/SS
I
TH
C
C
C
C2
C
SS
1.19V
1M
+
4(V
FB
)
0.86V
SLOPE
COMP
3mV
+
–
–
+
SENSE
–
SENSE
+
INTV
CC
30k
45k
2.4V
45k
30k
I1 I2
B
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
+– –+
Figure 2