General Description
The MAX16047/MAX16049 EEPROM-configurable system
managers monitor, sequence, and track multiple system
voltages. The MAX16047 manages up to twelve system
voltages simultaneously, and the MAX16049 manages up
to eight supply voltages. These devices integrate an ana-
log-to-digital converter (ADC) for monitoring supply volt-
ages, and configurable outputs for sequencing and
tracking supplies (during power-up and power-down).
Nonvolatile EEPROM registers are configurable for storing
upper and lower voltage limits, setting timing and
sequencing requirements, and for storing critical fault
data for read back following failures.
An internal 1% accurate 10-bit ADC measures each input
and compares the result to one upper, one lower, and
one selectable upper or lower limit. A fault signal asserts
when a monitored voltage falls outside the set limits. Up
to three independent fault output signals are configurable
to assert under various fault conditions.
The integrated sequencer/tracker allows precise control
over the power-up and power-down order of up to twelve
(MAX16047) or up to eight (MAX16049) power supplies.
Four channels (EN_OUT1–EN_OUT4) support closed-
loop tracking using external series MOSFETs. Six outputs
(EN_OUT1–EN_OUT6) are configurable with charge-
pump outputs to directly drive MOSFETs without closed-
loop tracking.
The MAX16047/MAX16049 include six programmable
general-purpose inputs/outputs (GPIOs). In addition to
serving as EEPROM-configurable I/O pins, the GPIOs
are also configurable as dedicated fault outputs, as a
watchdog input or output (WDI/WDO), or as a manual
reset (MR).
The MAX16047/MAX16049 feature two methods of fault
management for recording information during critical
fault events. The fault logger records a failure in the
internal EEPROM and sets a lock bit protecting the
stored fault data from accidental erasure.
An I
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C/SMBus™-compatible or a JTAG serial interface
configures the MAX16047/MAX16049. These devices are
offered in a 56-pin 8mm x 8mm TQFN package and are
fully specified from -40°C to +85°C.
Features
o Operate from 3V to 14V
o 1% Accurate 10-Bit ADC Monitors 12/8 Inputs
o 12/8 Monitored Inputs with One Overvoltage/
One Undervoltage/One Selectable Limit
o Nonvolatile Fault Event Logger
o Power-Up and Power-Down Sequencing
Capability
o 12/8 Outputs for Sequencing/Power-Good
Indicators
o Closed-Loop Tracking for Up to Four Channels
o Two Programmable Fault Outputs and One Reset
Output
o Six General-Purpose Input/Outputs Configurable as:
Dedicated Fault Output
Watchdog Timer Function
Manual Reset
o I
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C/SMBus-Compatible and JTAG Interface
o EEPROM-Configurable Time Delays and
Thresholds
o 100 Bytes of Internal User EEPROM
o 56-Pin (8mm x 8mm) TQFN Package
o -40°C to +85°C Operating Temperature Range
Applications
Servers
Workstations
Storage Systems
Networking/Telecom
MAX16047/MAX16049
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
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Maxim Integrated Products
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Ordering Information
