ltc3728legn-1-tr Linear Technology Corporation, ltc3728legn-1-tr Datasheet - Page 9

• Manufacturer Part Number: ltc3728legn-1-tr
• Description: Dual, 550khz, 2-phase Synchronous Regulator
• Manufacturer: Linear Technology Corporation

FUNCTIONAL DIAGRAM
R6
R5
V
INTV
F
IN
+
IN
R
5V
C
LP
LP
CC
PLLFLTR
PGOOD
3.3V
EXTV
INTV
PLLIN
SGND (UH PACKAGE PAD)
FCB
V
IN
50k
OUT
CC
CC
0.18μA
3V
OSCILLATOR
4.8V
PHASE DET
+
–
0.8V
4.5V
+
–
–
+
+
–
CLK1
CLK2
INTERNAL
–
–
–
–
+
+
+
+
SUPPLY
V
LDO
REG
5V
REF
0.86V
0.74V
0.86V
0.74V
BINH
FCB
V
V
OSENSE1
OSENSE2
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
1.2μA
6V
4(V
0.86V
FB
SLOPE
COMP
)
I1
S
R
+
–
0.55V
Q
Q
–
DROP
OUT
DET
Figure 2
45k
–
+
+
4(V
SHDN
+
RST
FB
B
3mV
)
BOT
TOP ON
–
SHDN
FCB
START
45k
SOFT
RUN
+
–
OV
2.4V
EA
I2
SWITCH
–
+
+
–
LOGIC
V
FB
0.80V
0.86V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
V
RUN/SS
SENSE
SENSE
BOOST
PGND
OSENSE
SW
I
TG
BG
TH
+
–
INTV
CC
R1
C
D
C
C
B
R2
B
C2
SS
C
C
LTC3728L-1
V
IN
R
C
R
D
SENSE
1
+
C
IN
+
3728l1fc
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