MAX16046 12-Channel EEPROM Configurable IC

Maxim's MAX16046 uses nonvolatile fault registers to store data and help identify the cause of system failure

Image of Maxim Integrated's MAX16046 12-Channel EEPROM Configurable ICMaxim's MAX16046 EEPROM-configurable system manager monitors, sequences, tracks, and margins multiple system voltages. The MAX16046 manages up to twelve system voltages simultaneously. This device integrates 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 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 includes twelve integrated 8-bit DAC outputs for margining power supplies when connected to the trim input of a point-of-load (POL) module. The MAX16046 includes six programmable general-purpose inputs/outputs (GPIOs). GPIOs are EEPROM configurable as dedicated fault outputs, watchdog input or output (WDI/WDO), manual reset (active-low MR), or margin control inputs. The MAX16046 features 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. This device is offered in a 56-pin 8 mm x 8 mm TQFN package or 64-pin 10 mm x 10 mm TQFP package and is fully specified from -40°C to +85°C.

Typical operating circuit diagram

  • 12 monitored inputs with 1 overvoltage/1 undervoltage/1 selectable limit
  • EEPROM-configurable time delays, thresholds, and DAC outputs
  • 12 8-bit DAC outputs for margining or voltage adjustments
  • 1% accurate 10-bit ADC monitors 12 inputs
  • Two programmable fault outputs and one reset output
  • Power-up and power-down sequencing capability
  • 12 outputs for sequencing/power-good indicators
  • Operates from 3 V to 14 V
  • 100 bytes of internal user EEPROM
  • Six general-purpose inputs/outputs configurable as:
    • Dedicated fault output 
    • Watchdog timer function
    • Manual reset
    • Margin enable input
  • Nonvolatile fault event logger
  • I2C (with timeout) and JTAG interface
  • Closed-loop tracking for up to four channels


  • Networking/telecom
  • Servers
  • Storage systems
  • Workstations

MAX16046 12-Channel EEPROM Configurable IC

ImageManufacturer Part NumberDescriptionTypeNumber of Voltages MonitoredAvailable Quantity
MAX16046ETN+ datasheet linkIC EE-PROG SYS MGR 12CH 56-TQFNMAX16046ETN+IC EE-PROG SYS MGR 12CH 56-TQFNSystem Manager12296 - Immediate
MAX16046ETN+ product page link
Published: 2011-06-01