Rainbow Electronics MAX16064 - Manual (Page 11)

MAX16064
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
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Detailed Description
The MAX16064 adds digital control functionality to four
power supplies. Using a closed-loop control system,
the MAX16064 can continuously adjust the power-sup-
ply output voltages to maintain ±0.3% output-voltage
accuracy. The MAX16064 can also be programmed to
sequence, track, and margin each power supply.
A PMBus-compliant interface bus provides access to
configuration parameters of the MAX16064, including
monitoring thresholds, sequence delays, soft-start and
soft-stop slew rates, output-voltage settings, an on-chip
temperature sensor, and more.
Up to 114 MAX16064s can reside on the same PMBus
bus, each controlling its own power supplies, under
commands from the PMBus system controller, as shown
in Figure 2. The MAX16064s can be placed close to the
power supplies they control so that all sensitive analog
traces are short and less susceptible to noise. The
power supplies can also be placed close to the load
where they provide the best transient response and low-
est losses with short power plane runs.
MAX16064
RS0+ VO+
RS0- VO-
DACOUT0 FB
ENOUT0 EN
POWER
SUPPLY
0
RS1+ VO+
RS1- VO-
DACOUT1 FB
ENOUT1 EN
POWER
SUPPLY
1
RS2+ VO+
RS2- VO-
DACOUT2 FB
ENOUT2 EN
POWER
SUPPLY
2
RS3+ VO+
RS3- VO-
DACOUT3 FB
ENOUT3 EN
POWER
SUPPLY
3
SCL
SDA
IRQ
RST
SYSTEM
CONTROLLER
SCL
SDA
SMBALERT
RESET
MAX16064
RS0+ VO+
RS0- VO-
DACOUT0 FB
ENOUT0 EN
POWER
SUPPLY
(N-3)
RS1+ VO+
RS1- VO-
DACOUT1 FB
ENOUT1 EN
POWER
SUPPLY
(N-2)
RS2+ VO+
RS2- VO-
DACOUT2 FB
ENOUT2 EN
POWER
SUPPLY
(N-1)
RS3+ VO+
RS3- VO-
DACOUT3 FB
ENOUT3 EN
POWER
SUPPLY
(N)
SCL
SDA
SMBALERT
RESET
Figure 2. System Application Showing Multiple MAX16064s Controlling Power Supplies