LTC3861-1 Datasheet, PDF (22/36 Pages) Linear Technology – Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing

LTC3861-1
Applications Information
V_CC
0, 120
LTC3861-1
CLKIN CLKOUT
PHSMD
FB1
FB1
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
V_CC
+240
240, 60
LTC3861-1
CLKIN CLKOUT
PHSMD TRACK/SS2
FB1
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1
Figure 7a. 3-Phase Operation
FB2
38611 F07a
V_CC
0, 180
V_CC
90, 270
LTC3861-1
CLKIN CLKOUT
+90
LTC3861-1
CLKIN CLKOUT
PHSMD
PHSMD
FB1
FB1
FB1
FB2
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
38611 F07b
Figure 7b. 4-Phase Operation
FB1
V_CC
0, 180
V_CC
60, 240
V_CC
120, 300
LTC3861-1
CLKIN CLKOUT
+60
LTC3861-1
CLKIN CLKOUT
+60
LTC3861-1
CLKIN CLKOUT
PHSMD
PHSMD
PHSMD
FB1
FB1
FB1
FB2
FB2
FB2
I_LIM2
I_LIM1
COMP1
COMP2
I_LIM2
I_LIM1
COMP1
COMP2
I_LIM2
I_LIM1
COMP1
COMP2
I_AVG TRACK/SS1,2
I_AVG TRACK/SS1,2
I_AVG TRACK/SS1,2
38611 F07c
Figure 7c. 6-Phase Operation
FB1
V_CC
0, 180
V_CC
60, 240
V_CC
120, 300
LTC3861-1
CLKIN CLKOUT
+60
LTC3861-1
CLKIN CLKOUT
+60
LTC3861-1
CLKIN CLKOUT
+90
PHSMD
PHSMD
PHSMD
FB1
FB1
FB1
FB2
FB2
FB2
I_LIM2
I_LIM1
COMP1
COMP2
I_LIM2
I_LIM1
COMP1
COMP2
I_LIM2
I_LIM1
COMP1
COMP2
I_AVG TRACK/SS1,2
I_AVG TRACK/SS1,2
I_AVG TRACK/SS1,2
22
V_CC
210, 30
LTC3861-1
CLKIN CLKOUT
PHSMD
FB1
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
V_CC
+60
270, 90
LTC3861-1
CLKIN CLKOUT
PHSMD
FB1
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
V_CC
+60
330, 150
LTC3861-1-1
CLKIN CLKOUT
PHSMD
FB1
FB2
I_LIM2
COMP1
I_LIM1
COMP2
I_AVG TRACK/SS1,2
38611 F07d
Figure 7d. 12-Phase Operation
Figure 7. PHSMD Connections for 3-, 4-, 6- or 12-Phase Operation
38611f