LTC3773 Datasheet, PDF (12/32 Pages) Linear Technology – Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking

LTC3773
FUNCTIONAL DIAGRAM
PGOOD
V_FB
TRACK
R2
R1
CLKOUT PHASEMD
PHASE DET
PLLIN/FC
R_LP
F_IN
100 s
DELAY
CH3 PBAD
CH2 PBAD
CH1 PBAD
CLK3
CLK2
OSCILLATOR
DUPLICATE FOR CH2 AND CH3
3V
FORCE CONT
–
+
1V
PLLFLTR
ENABLE
BURST
C_LP
V_DR
V_IN
BOOST
D_B
+–
+–
0.54V
0.66V
0.6225V
V_CC V_CC
– ^OV
+
–
EA
+
CLK1
BOT
SQ
RQ
RS
LATCH
0.5V
DROP
OUT
DET
+
–
FORCE BOT
TOP ON
SHDN
SWITCH
LOGIC
SLEEP
–
I_{1 – +}
+ ^I2
SLOPE
3mV
COMP
TOP
BOT
V_CC
36k
V_CC
V_DR
SHDN
DRV
0.6V
I_TH
C_C
R_C
CH3
SHDN
+–
2.4V
5.3 x V_FB
0.645V
SLOPE
COMP
CH2
SHDN
CH1
SHDN
+–
1.8V
+–
1.2V
54k
54k
1.8V
2.4V
MASTER
SHDN
SDB2
V_CC
SDB3
UV
RESET
INTERNAL
SUPPLY
36k
3.94V
TG
C_B
SW
V_DR
BG
PGND
+
C_IN
SENSE⁺
L
SENSE^{– RSENSE}
C_OUT
V_OUT
0.6V
V_{REF VCC} VCC
+
C_VCC
SDB3
SDB2
SDB1
SGND
3773 F01
Figure 1. Functional Diagram
3773fb
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