Datasheet
LTC3868-1
10
38681fd
FUNCTIONAL DIAGRAM
SW
TOP
BOOST
TG
C
B
C
IN
D
D
B
PGND
BOT
BG
INTV
CC
INTV
CC
V
IN
C
OUT
V
OUT
38681 FD
R
SENSE
DROP
OUT
DET
BOT
TOP ON
S
R
Q
Q
SHDN
SLEEP
0.425V
ICMP
2(V
FB
)
0.45V
IR
3mV
SLOPE COMP
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
SENSE
+
SENSE
–
PGOOD1
V
FB1
0.88V
0.72V
L
+
–
+
–
FREQ
+
–
+
–
+
–
+
–
+
–
+
–
SWITCH
LOGIC
V
FB
R
A
C
C
R
C
C
C2
R
B
0.80V
TRACK/SS
0.88V
0.5µA
RUN
I
TH
SS
+
–
C
SS
1µA
SHDN
10µA
FOLDBACK
SHDN
RST
2(V
FB
)
SHORT CKT
LATCH-OFF
PLLIN/MODE
20µA
VCO
LDO
EN
INTV
CC
5.1V
SYNC
DET
100k
CLK2
CLK1
V
IN
EXTV
CC
LDO
PFD
EN
4.7V
5.1V
+
–
SGND
EA
OV
11V