12-Channel/8-Channel Flash-Configurable System Managers with Nonvolatile Fault Registers

The MAX16065/MAX16066 flash-configurable system managers monitor and sequence multiple system voltages. The MAX16065/MAX16066 can also accurately monitor (±2.5%) one current channel using a dedicated high-side current-sense amplifier. The MAX16065 manages up to twelve system voltages simultaneously, and the MAX16066 manages up to eight supply voltages. These devices integrate a selectable differential or single-ended analog-to-digital converter (ADC) and configurable outputs for sequencing power supplies. Device configuration information, including overvoltage and undervoltage limits, timing settings, and the sequencing order is stored in nonvolatile flash memory. During a fault condition, fault flags and channel voltages can be automatically stored in the nonvolatile flash memory for later read-back.

The internal 1% accurate 10-bit ADC measures each input and compares the result to one overvoltage, one undervoltage, and one early warning limit that can be configured as either undervoltage or overvoltage. 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.

Because the MAX16065/MAX16066 support a power-supply voltage of up to 14V, they can be powered directly from the 12V intermediate bus in many systems.

The integrated sequencer provides precise control over the power-up and power-down order of up to twelve (MAX16065) or up to eight (MAX16066) power supplies. Eight outputs (ENOUT1–ENOUT8) are configurable with charge-pump outputs to directly drive external n-channel MOSFETs.

The MAX16065/MAX16066 include eight/six programmable general-purpose inputs/outputs (GPIOs). GPIOs are flash configurable as dedicated fault outputs, as a watchdog input or output, or as a manual reset.

The MAX16065/MAX16066 feature nonvolatile fault memory for recording information during system shutdown events. The fault logger records a failure in the internal flash and sets a lock bit protecting the stored fault data from accidental erasure. An SMBus or a JTAG serial interface configures the MAX16065/MAX16066. The MAX16065 is available in a 48-pin, 7mm x 7mm, TQFN package, and the MAX16066 is available in a 40-pin, 6mm x 6mm, TQFN package. Both devices are fully specified from -40°C to +85°C.

Applications

* Networking Equipment * Servers * Storage/RAID Systems * Telecom Equipment (Base Stations, Access)

* Operate from 2.8V to 14V

* ±2.5% Current-Monitoring Accuracy

* 1% Accurate 10-Bit ADC Monitors 12/8 Voltage Inputs

* Single-Ended or Differential ADC for System Voltage/Current Monitoring

* Integrated High-Side Current-Sense Amplifier

* 12/8 Monitored Inputs with Overvoltage/Undervoltage/Early Warning Limit

* Nonvolatile Fault Event Logger

* Power-Up and Power-Down Sequencing Capability

* Independent Secondary Sequence Block

* 12/8 Outputs for Sequencing/Power-Good Indicators

* Two Programmable Fault Outputs and One Reset Output

* Eight General-Purpose Inputs/Outputs Configurable as:

* Dedicated Fault Outputs

* Watchdog Timer Function

* Manual Reset

* Margin Enable

* SMBus (with Timeout) or JTAG Interface

* Flash Configurable Time Delays and Thresholds

* -40°C to +85°C Operating Temperature Range