Datasheet

LTC3828
9
3828fc
BLOCK DIAGRAM
SWITCH
LOGIC
–
+
5V
V
IN
4.5V
BINH
CLK2
CLK1
0.18µA
+
–
FCB
+
–
–
+
0.8V
V
REF
INTERNAL
SUPPLY
R
LP
C
LP
3V
FCB/PLLIN
INTV
CC
SGND (UH PACKAGE PAD)
+
5V LDO REG
SW
SHDN
0.55V
TOP
BOOST
TG
C
B
C
IN
D1
D
B
PGND
BOT
BG
DRV
CC
DRV
CC
V
IN
+
+
C
OUT
V
OUT
3828 FD/F01
R
SENSE
V
OSENSE
DROP
OUT
DET
RUN
SOFT-
START
BOT
TOP ON
S
R
Q
Q
OSCILLATOR
PHASE DET
PLLFLTR
CLKOUT
FCB
EA
0.86V
0.80V
OV
V
FB
R1
–
+
R2
R
C
4(V
FB
)
RST
SHDN
RUN
I
TH
C
C
C
C2
4 s V
FB
0.86V
SLOPE COMP
3mV
+
–
–
+
SENSE
–
SENSE
+
INTV
CC
30k
45k
2.4V
45k
30k
100k
I
1
I
2
B
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
C
SS
+– –+
PHASE LOGIC
PHSMD
+
–
+
–
+
–
+
–
PGOOD
V
OSENSE1
V
OSENSE2
0.86V
0.74V
0.86V
0.74V
PLL
DETECTOR
TRCKSS
1.2µA
DRV
CC
Figure 1