MAX16046_09 Datasheet, PDF (1/70 Pages) Maxim Integrated Products – 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers

19-1050; Rev 4; 3/09
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12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
General Description
The MAX16046/MAX16048 EEPROM-configurable system
managers monitor, sequence, track, and margin multiple
system voltages. The MAX16046 manages up to twelve
system voltages simultaneously, and the MAX16048 man-
ages up to eight supply voltages. These devices integrate
an analog-to-digital converter (ADC) for monitoring supply
voltages, digital-to-analog converters (DAC) for adjusting
supply voltages, 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 readback 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
(MAX16046) or up to eight (MAX16048) 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 MAX16046/MAX16048 include twelve/eight inte-
grated 8-bit DAC outputs for margining power supplies
when connected to the trim input of a point-of-load
(POL) module.
The MAX16046/MAX16048 include six programmable
general-purpose inputs/outputs (GPIOs). GPIOs are
EEPROM configurable as dedicated fault outputs, as a
watchdog input or output (WDI/WDO), as a manual reset
(MR), or for margin control inputs.
The MAX16046/MAX16048 feature two methods of fault
management for recording information during system
shutdown 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 I²C or a JTAG serial interface configures the
MAX16046/MAX16048. These devices are offered in a
56-pin 8mm x 8mm TQFN package or a 64-pin 10mm x
10mm TQFP package and are fully specified from -40°C
to +85°C.
Features
o Operates from 3V to 14V
o 1% Accurate 10-Bit ADC Monitors 12/8 Inputs
o 12/8 Monitored Inputs with 1 Overvoltage/
1 Undervoltage/1 Selectable Limit
o 12/8 8-Bit DAC Outputs for Margining or Voltage
Adjustments
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
Margin Enable Input
o I²C (with Timeout) and JTAG Interface
o EEPROM-Configurable Time Delays, Thresholds,
and DAC Outputs
o 100 Bytes of Internal User EEPROM
o -40°C to +85°C Operating Temperature Range
Servers
Workstations
Storage Systems
Networking/Telecom
Applications
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16046ECB+
-40°C to +85°C 64 TQFP-EP*
MAX16046ETN+
-40°C to +85°C 56 TQFN-EP*
MAX16048ECB+
-40°C to +85°C 64 TQFP-EP*
MAX16048ETN+
-40°C to +85°C 56 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.