LTC3738 Linear Technology, LTC3738 Datasheet - Page 10

• Manufacturer Part Number: LTC3738
• Description: 3-Phase Buck Controller
• Manufacturer: Linear Technology

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LTC3738
FU CTIO AL DIAGRA
10
R
U
AVP
FCB/SYNC
R
R
PRE-AVP
SELECTION
EAIN
C
AVP
C
IN
IN
I
TH
C
–
+
VID
R
C
LP
LP
2.4V
0.6V
PLLFLTR
VID5
U
2.5µA
ADDER
–
+
VRM9/VRM10 VID DECODER
0.600V
0.660V
+
–
VID0 VID1 VID2 VID3 VID4
80k
80k
+
–
+
–
+
–
V
FB
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
FCB
80k
80k
OSCILLATOR
PHASE DET
–
+
+
–
+
–
EA
A1
+
–
+
–
+
–
OV
PGOOD
R2 VARIABLE
CLK1
CLK2
CLK3
W
VID TRANSITIONS
R1
8k
BLANKING
100µs
DUPLICATE FOR SECOND AND THIRD
CONTROLLER CHANNELS
V
CC
6V
NO_CPU
5(V
1.5µA
S
R
FB
LATCH
SLOPE
COMP
RS
)
Figure 1
Q
Q
–
–
I
+
+
1
5(V
1µs
–
+
SHDN
2.4V
RST
FB
–
0.66V
0.54V
)
EAIN
DROP
OUT
DET
+
START
+
SOFT-
45k
SHED
RUN
DETECTION
3mV
INTERNAL
THERMAL
FORCED BOT
–
SHDN
V
TOP ON
CC
FCB
TSNS
45k
/3
–
+
I
2
INTERNAL
SWITCH
LOGIC
SUPPLY
–
+
0.600V
TCMP
TOP
BOT
MUX
V
100k
V
CC
30k
30k
V
CC
REF
VR_HOTB
SENSE
SENSE
BOOST
OUTEN
PGND
SGND
SW
V
BG
TG
SS
CC
+
–
+
V
R
CC
V
SENSE
CC
C
C
D
CC
SS
C
B
B
L
V
IN
+
3738f
C
IN