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LTC3731H Datasheet, PDF (9/32 Pages) Linear Technology – 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller | |||
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W
FU CTIO AL DIAGRA
LTC3731H
PLLIN
FIN
50k
RLP PLLFLTR
CLP
CLKOUT
PHASMD
PHASE DET
OSCILLATOR
CLK1
CLK2
CLK3
PGOOD
100µs
DELAY
PROTECTION
FCB
+
0.6V â
FCB
R1
EAIN
VFB
R2
0.600V
0.660V
ITH
â
EA
+
OV
+
â
CC
RC
0.66V
EAIN
0.54V
UVADJ
â
1.2V +
DUPLICATE FOR SECOND AND THIRD
CONTROLLER CHANNELS
BOOST
RS
LATCH
DROP
OUT
DET
BOT
TG
TOP
SQ
FORCE BOT
RQ
SWITCH
SW
LOGIC
0.55V
B
FCB
SHDN
VCC (VDR)
BG
BOT
PGND
VCC
VIN
DB
CB
+
CIN
I1 â +
SLOPE
COMP
5(VFB)
0.86V
SS
CLAMP 2.4V
3mV
54k
â
I2
+
54k
L
VCC
36k SENSE+
36k SENSEâ
RSENSE
COUT
VOUT
FCB
VCC
1.5µA
6V
SHDN
RST
5(VFB)
SHED
RUN
SOFT-
START
1.2V
0.600V
INTERNAL
SUPPLY
UV RESET
VREF
VCC
SGND
VCC
+
CCC
RUN/SS
CSS
3731H F02
Figure 2
3731hf
9
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