Datasheet

General Description
The MAX16046/MAX16048 EEPROM-configurable sys-
tem managers monitor, sequence, track, and margin
multiple system voltages. The MAX16046 manages
up to twelve system voltages simultaneously, and the
MAX16048 manages 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 out-
puts 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 stor-
ing 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 out-
puts to directly drive MOSFETs without closed-loop tracking.
The MAX16046/MAX16048 include twelve/eight integrated
8-bit DAC outputs for margining power supplies when con-
nected 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 as 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 I
2
C 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
● Operates from 3V to 14V
● 1% Accurate 10-Bit ADC Monitors 12/8 Inputs
● 12/8 Monitored Inputs with 1 Overvoltage/
1 Undervoltage/1 Selectable Limit
● 12/8 8-Bit DAC Outputs for Margining or Voltage
Adjustments
● Nonvolatile Fault Event Logger
● Power-Up and Power-Down Sequencing Capability
● 12/8 Outputs for Sequencing/Power-Good Indicators
● Closed-Loop Tracking for Up to Four Channels
● Two Programmable Fault Outputs and One Reset
Output
● Six General-Purpose Input/Outputs Configurable as:
Dedicated Fault Output
Watchdog Timer Function
Manual Reset
Margin Enable Input
● I
2
C (with Timeout) and JTAG Interface
● EEPROM-Configurable Time Delays, Thresholds,
and DAC Outputs
● 100 Bytes of Internal User EEPROM
● -40°C to +85°C Operating Temperature Range
Applications
● Servers
● Workstations
● Storage Systems
● Networking/Telecom
19-1050; Rev 8; 11/14
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX16046.related.
MAX16046/MAX16048 12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers