Analog Devices Inc./Maxim Integrated MAX16047ATN+

Overview

MAX16047ATN+ from Maxim Integrated is a 12-channel EEPROM-configurable system manager IC that monitors, sequences, and tracks power supplies in high-reliability systems. It features a 1% accurate 10-bit ADC for real-time voltage monitoring across 12 inputs, configurable sequencing with up to 12 programmable outputs (EN_OUT1–EN_OUT12), closed-loop tracking on four channels, nonvolatile fault logging, and dual I²C/SMBus and JTAG interfaces. It operates from 3V to 14V and is rated for -40°C to +125°C - used in server power rail management where deterministic startup/shutdown and post-fault diagnostics are critical.

For engineers reviewing the MAX16047ATN+ datasheet, MAX16047ATN+ pinout, MAX16047ATN+ application, or MAX16047ATN+ equivalent, this page delivers verified technical context, exact pin functions, confirmed sequencing capabilities, validated fault logging behavior, and real-world design implications - all grounded in the official Maxim datasheet Rev 1 (9/10) and functional specifications.

Technical Context

The MAX16047ATN+ integrates a SAR-based 10-bit ADC with ±1% total unadjusted error over -40°C to +125°C, supporting three per-channel voltage thresholds (overvoltage, undervoltage, selectable). Its sequencer implements programmable delays (20µs to 1.6s) and reverse-sequence power-down via EEPROM-configurable registers r50h–r54h and r5Eh–r63h.

It supports two independent fault output signals (FAULT1/FAULT2) and one reset output (RESET), each configurable via registers r15h–r1Bh to respond to combinations of monitored input faults. Closed-loop tracking on EN_OUT1–EN_OUT4 uses internal differential comparators with 150mV tracking stop ramp and 280–370mV fault threshold, referenced to external MOSFET feedback (INS1–INS4).

Key Specifications

Pinout & Package

MAX16047ATN+ is housed in a 56-pin, 8mm × 8mm TQFN-EP package with exposed pad (EP) internally connected to GND. The package supports high thermal dissipation (θJC = 0.6°C/W) and requires proper PCB grounding of EP for reliability in industrial/server environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16050ATN+, MAX16047ATN+ provides 50% more monitoring and sequencing capacity while retaining identical temperature rating, interface flexibility, and fault resilience. Against TPS40400RHLR, it delivers autonomous, self-contained supervision without host dependency - critical for fail-safe embedded systems.

Availability

MAX16047ATN+ is available at Aetrix Electronics and suitable for server motherboard design, enterprise storage power control, networking equipment sequencing, and industrial embedded controller monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16047ATN+ 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 - emphasizing reliability, integration, and configurability.

The MAX16047ATN+ belongs to Maxim's system management product line, engineered specifically for high-density, high-availability power architectures where deterministic sequencing, autonomous fault response, and post-event diagnostics are mandatory.

FAQ

What is the maximum number of voltage rails the MAX16047ATN+ can monitor and sequence?

The MAX16047ATN+ monitors and sequences up to 12 independent voltage rails. It provides 12 analog monitor inputs (MON1–MON12), 12 programmable enable outputs (EN_OUT1–EN_OUT12), and supports closed-loop tracking on four of those outputs (EN_OUT1–EN_OUT4) using external MOSFETs and feedback sense lines (INS1–INS4). This capability is explicitly defined in the datasheet's General Description and Pin Description sections.

Does the MAX16047ATN+ include nonvolatile memory for fault logging, and how is it protected?

Yes, the MAX16047ATN+ includes a dedicated nonvolatile fault event logger that automatically writes ADC conversion results, failed-line flags, and register states to internal EEPROM at the moment of a critical fault. The logged data is write-protected by a hardware lock bit to prevent accidental erasure during normal operation or recovery - a feature confirmed in the Functional Diagram and Detailed Description sections of the datasheet.

Can the MAX16047ATN+ operate with both I²C/SMBus and JTAG interfaces simultaneously?

No, the MAX16047ATN+ supports I²C/SMBus and JTAG as independent, mutually exclusive interfaces - only one may be active at a time. The datasheet explicitly states "Use only one interface at any given time" and confirms separate pin assignments (SCL/SDA vs. TMS/TDI/TCK/TDO) with no shared resources. Concurrent use is electrically and functionally prohibited.

What is the operating voltage range and temperature specification for the MAX16047ATN+?

The MAX16047ATN+ operates from 3V to 14V on VCC and is fully specified across -40°C to +125°C ambient temperature. This is confirmed in the Ordering Information table (listing "-40°C to +125°C" for MAX16047ATN+) and the Absolute Maximum Ratings and Electrical Characteristics tables, which provide parameter limits across that full range.

How does the MAX16047ATN+ handle power-up sequencing and reset assertion?

Upon power-on, the MAX16047ATN+ enters a boot-up sequence lasting up to 1.5ms. During this time, RESET is held low, all EN_OUTs and GPIOs remain in high-impedance state, and monitored inputs are masked from fault generation. After boot completes, RESET releases only if all 12 monitored voltages meet their programmed thresholds - otherwise it remains asserted. This behavior is documented in the Detailed Description section under "Getting Started" and "RESET output asserted low" in Electrical Characteristics.