LTM4620 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTM4620 Datasheet PDF : 40 Pages
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APPLICATIONS INFORMATION
LTM4620
2-PHASE DESIGN
FLOAT
CLKOUT
MODE_PLLIN
0 PHASE
VOUT1
PHASMD
180 PHASE
VOUT2
PHASMD
CONTROLLER1
CONTROLLER2
CLKOUT
SGND
0
180
60
FLOAT
0
180
90
INTVCC
0
240
120
4-PHASE DESIGN
CLKOUT
90 DEGREE
CLKOUT
MODE_PLLIN
0 PHASE
FLOAT VOUT1
PHASMD
180 PHASE
VOUT2
MODE_PLLIN
90 PHASE
FLOAT VOUT1
PHASMD
270 PHASE
VOUT2
6-PHASE DESIGN
CLKOUT
60 DEGREE
CLKOUT
60 DEGREE
CLKOUT
MODE_PLLIN
0 PHASE
SGND VOUT1
PHASMD
180 PHASE
VOUT2
MODE_PLLIN
60 PHASE
SGND VOUT1
PHASMD
240 PHASE
VOUT2
MODE_PLLIN
120 PHASE
FLOAT VOUT1
PHASMD
300 PHASE
VOUT2
4620 F03
Figure 3. Examples of 2-Phase, 4-Phase, and 6-Phase Operation with PHASMD Table
A multiphase power supply significantly reduces the
amount of ripple current in both the input and output ca-
pacitors. The RMS input ripple current is reduced by, and
the effective ripple frequency is multiplied by, the number
of phases used (assuming that the input voltage is greater
than the number of phases used times the output voltage).
The output ripple amplitude is also reduced by the number
of phases used when all of the outputs are tied together
to achieve a single high output current design.
The LTM4620 device is an inherently current mode con-
trolled device, so parallel modules will have very good
current sharing. This will balance the thermals on the
design. Figure 26 shows an example of parallel operation
and pin connection.
For more information www.linear.com/LTM4620
4620fb
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