Rainbow-electronics MAX16064 User Manual download pdf (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

RS1+ VO+

RS1- VO-

DACOUT1 FB

ENOUT1 EN

POWER

SUPPLY

RS2+ VO+

RS2- VO-

DACOUT2 FB

ENOUT2 EN

POWER

SUPPLY

RS3+ VO+

RS3- VO-

DACOUT3 FB

ENOUT3 EN

POWER

SUPPLY

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

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 51 52

MAX16064 1

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Rainbow-electronics MAX16064 User Manual Page 11

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