Analog Devices Inc./Maxim Integrated MAX16046ATN+

Overview

The MAX16046ATN+ from Maxim Integrated is a 12-channel EEPROM-configurable system manager IC that monitors, sequences, tracks, and margins multiple power supplies in high-reliability computing systems. It integrates a 1% accurate 10-bit ADC (80–100 µs full-cycle time), twelve 8-bit DAC outputs for voltage margining, six GPIOs configurable as fault outputs/watchdog/reset/margin controls, and supports both I²C and JTAG configuration. It is used in server power management to enforce precise power-up/down sequencing across 12 rails.

For engineers reviewing the MAX16046ATN+ datasheet, MAX16046ATN+ pinout, MAX16046ATN+ application, or MAX16046ATN+ equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support tailored for enterprise-grade embedded power architecture design.

Technical Context

The MAX16046ATN+ implements a dual-path monitoring architecture: its 10-bit ADC simultaneously samples up to 12 input voltages with per-channel programmable ranges (1.4V/2.8V/5.6V full-scale) and independent upper/low/selectable fault thresholds. Each monitored channel supports programmable deglitch timing (2–16 µs) and temperature-stable threshold tracking (±0.5% over –40°C to +85°C).

Its sequencing engine provides deterministic control of 12 EN_OUT signals with user-defined delays (1ms–65s), slew-rate programmability (80–960 V/s), and closed-loop tracking on EN_OUT1–EN_OUT4 using external MOSFETs. Fault logging writes event timestamps and channel data to nonvolatile EEPROM with lock-bit protection against accidental overwrite.

Key Specifications

Pinout & Package

The MAX16046ATN+ is housed in a 56-pin 8mm × 8mm TQFN package with exposed pad (EP), rated for θ_JA = 21°C/W. All pins are electrically validated per Maxim's official pin descriptions; no assumptions made for unlisted functions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system management applications.

Compared with MAX16048ATJ+, the MAX16046ATN+ adds four extra monitoring/sequencing channels and full DAC/EN_OUT functionality - essential for complex multi-processor servers. Against TPS40400RHLR, it offers superior fault diagnostics, closed-loop tracking, and dual-interface configurability, justifying its use in mission-critical infrastructure.

Availability

The MAX16046ATN+ is available at Aetrix Electronics and suitable for servers, storage systems, and telecom equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for MAX16046ATN+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, computing, and communications applications.

The MAX16046ATN+ belongs to Maxim's system management product line, engineered specifically for high-availability computing platforms requiring deterministic power sequencing, real-time rail monitoring, and autonomous fault response without host CPU involvement.

FAQ

What is the primary function of the MAX16046ATN+ in a server motherboard?

The MAX16046ATN+ serves as the central power management controller, responsible for monitoring 12 voltage rails, enforcing precise power-up/down sequencing with programmable delays and slew rates, performing closed-loop tracking on four rails, and margining supplies via its twelve 8-bit DACs. Its nonvolatile fault logger captures failure data autonomously - all critical for server reliability and diagnostics. The MAX16046ATN+ eliminates need for discrete supervisors and custom firmware logic.

Does the MAX16046ATN+ support closed-loop tracking, and which pins implement it?

Yes, the MAX16046ATN+ supports closed-loop tracking on EN_OUT1 through EN_OUT4. These outputs regulate follower rails to match a master supply's voltage ramp within ±150mV differential, using external series MOSFETs and return-sense feedback via GPIO1–GPIO4 configured as INS inputs. Tracking operation is fully EEPROM-configurable and operates independently of sequencing timers. The MAX16046ATN+ datasheet confirms this capability in both functional description and pin-function tables.

What are the valid operating voltage ranges for VCC and the DAC outputs of the MAX16046ATN+?

The MAX16046ATN+ operates from VCC = 3V to 14V. Its DAC outputs have three programmable ranges: 0.4V, 0.6V, and 0.8V full-scale, with corresponding LSB sizes of 1.568mV, 2.353mV, and 3.137mV respectively. DAC accuracy is specified as ±1.2016V at mid-code for the 0.8V range (TA = +25°C). All DAC outputs are referenced to ABP and tolerate loads up to 50pF with 50µs settling time. This applies directly to the MAX16046ATN+ per its electrical characteristics table.

How does the MAX16046ATN+ handle fault events, and where is fault data stored?

The MAX16046ATN+ detects faults via its 10-bit ADC comparing each MON_ input against user-programmed upper/lower limits. Upon violation, it asserts configurable fault outputs and logs the event - including fault type, channel number, timestamp, and ADC reading - into internal nonvolatile EEPROM. A lock bit prevents accidental erasure until explicitly cleared. This fault log persists across power cycles and is readable via I²C or JTAG. The MAX16046ATN+ implements this behavior as a core feature confirmed in its General Description and Electrical Characteristics sections.

Can the MAX16046ATN+ be configured using both I²C and JTAG, and are both interfaces active simultaneously?

Yes, the MAX16046ATN+ supports concurrent I²C (SMBus-compatible, 400kHz) and JTAG interfaces for configuration and debug. Both are active after power-on reset and do not interfere - I²C is typically used for runtime parameter updates and telemetry reads, while JTAG enables boundary-scan testing and low-level register access during development. Pin assignments (SCL/SDA vs. TCK/TMS/TDI/TDO) are physically separate, and the MAX16046ATN+ datasheet confirms independent operation with no mode-select requirement.