LTC3731H Linear Technology, LTC3731H Datasheet - Page 9

• Manufacturer Part Number: LTC3731H
• Description: Synchronous Buck Switching Regulator Controller
• Manufacturer: Linear Technology

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FU CTIO AL DIAGRA
PGOOD
R1
U
F
IN
R
C
R2
LP
LP
PLLFLTR
PHASMD
CLKOUT
R
UVADJ
PLLIN
EAIN
C
DELAY
FCB
C
100µs
I
1.2V
TH
C
0.600V
0.660V
PROTECTION
U
0.6V
50k
+
–
V
FB
+
–
OSCILLATOR
PHASE DET
–
+
+
–
EA
OV
FCB
–
+
–
+
CLK1
CLK2
CLK3
0.66V
0.54V
EAIN
W
DUPLICATE FOR SECOND AND THIRD
CONTROLLER CHANNELS
LATCH
RS
V
CC
6V
5(V
1.5µA
0.86V
FB
SLOPE
COMP
CLAMP
)
S
R
SS
I
1
5(V
Figure 2
–
+
SHDN
0.55V
Q
Q
RST
FB
–
2.4V
FCB
)
DROP
OUT
DET
+
START
+
SOFT-
54k
B
SHED
RUN
3mV
BOT
FORCE BOT
–
SHDN
FCB
54k
UV RESET
+
–
I
2
INTERNAL
SWITCH
LOGIC
SUPPLY
0.600V
1.2V
TOP
BOT
V
CC
V
CC
36k
36k
V
(VDR)
REF
SENSE
SENSE
BOOST
RUN/SS
PGND
SGND
SW
V
TG
BG
CC
+
–
+
V
R
CC
V
SENSE
CC
C
C
D
CC
SS
LTC3731H
C
B
B
L
V
IN
+
3731hf
9
C
IN