MAX16047A/MAX16049A EEPROM-Configurable

　The MAX16047A /MAX16049A EEPROM -configurable system managers monitor, sequence, and track multiple system voltages. The MAX16047A can manage 12 system voltages simultaneously, and the MAX16049A can manage 8 supply voltages. The devices integrate analog-to-digital converters (ADCs) for monitoring supply voltages and configurable outputs for sequencing and tracking supplies (at power-up and power-down). Nonvolatile EEPROM registers can be configured to record upper and lower voltage limits, set timing and sequencing as required, and store critical fault data so that fault information can be read back after a fault occurs. 

　　The internal 1% accurate 10-bit ADC measures each input and compares the result with the upper and lower voltage thresholds and a voltage that can be configured as an upper or lower limit. When the detected voltage exceeds the set threshold, a fault alarm signal is generated. Three independent alarm outputs can be configured for different fault conditions.

　　The integrated sequencer/tracker ensures accurate control of 12 (MAX16047A) or 8 (MAX16049A) power inputs during power-up and power-down. Four channels (EN_OUT1–EN_OUT4) use external series MOSFETs for closed-loop tracking, while six outputs (EN_OUT1–EN_OUT6) drive MOSFETs directly with the charge pump output without closed-loop tracking.

　　The MAX16047A/MAX16049A provide six programmable general-purpose input/output pins (GPIOs). In addition to being used as EEPROM-configurable I/O pins, these GPIOs can also be used as dedicated fault outputs, watchdog inputs or outputs (WDI/WDO), or manual resets (active-low MR).

　　The MAX16047A/MAX16049A have two fault management methods for recording information when critical fault conditions occur in the system. The fault log records the fault in the internal EEPROM. To prevent accidental erase operations, a latch bit can be set to protect the stored fault data.

　　The MAX16047A/MAX16049A are configured using either the I²C/SMBus™ or JTAG serial interface. The devices are available in a 56-pin, 8mm x 8mm TQFN package and are specified over the -40°C to +125°C temperature range.

　　Key Features

　　Operating voltage range from 3V to 14V

　　1% accurate 10-bit ADC for monitoring 12/8 inputs

　　12/8 monitoring inputs with 1 overvoltage threshold/1 undervoltage threshold/1 selectable threshold

　　Non-volatile fault event recorder

　　Power-on and power-off sequencing

　　12/8-way sequencing/power-good indication output

　　Up to four closed-loop tracking

　　Two programmable fault outputs and one reset output

　　Six general purpose input/outputs configurable as:

　　Dedicated fault output

　　Watchdog timer function

　　Manual reset

　　I²C/SMBus and JTAG interfaces

　　Delay and threshold configuration via EEPROM

　　100 bytes internal user EEPROM

　　56-pin (8mm x 8mm) TQFN package

　　-40°C to +125°C operating temperature range