Analog Devices Inc./Maxim Integrated MAX16046ETN+CK9

Overview

MAX16046ETN+CK9 from Maxim Integrated is a 12-channel EEPROM-configurable system manager IC that monitors, sequences, tracks, and margins multiple power supplies in high-reliability systems. It integrates a 1% accurate 10-bit ADC (80–100µs full-cycle time), twelve 8-bit DAC outputs for voltage margining, and twelve configurable sequencing outputs-including four with closed-loop tracking capability-enabling precise control of power-up/down order in server and storage applications.

For engineers reviewing the MAX16046ETN+CK9 datasheet, MAX16046ETN+CK9 pinout, MAX16046ETN+CK9 application, or MAX16046ETN+CK9 equivalent, this device supports dual I²C/SMBus and JTAG configuration interfaces, features nonvolatile fault logging with lock-bit protection, operates across -40°C to +85°C, and delivers ±0.75% ADC total unadjusted error over temperature for robust supply monitoring in mission-critical infrastructure.

Technical Context

The MAX16046ETN+CK9 implements a hierarchical power management architecture: its 10-bit ADC continuously samples up to 12 monitored inputs (MON1–MON12) against independently programmable upper/low/selectable thresholds, triggering fault signals on violation. Each monitored channel supports three selectable input ranges (1.4V, 2.8V, 5.6V), with MON1–MON4 exhibiting 46–100kΩ input impedance and MON5–MON12 at 65–140kΩ.

Its sequencer supports flexible timing via EEPROM-stored delay registers (±5% internal timing accuracy), while four EN_OUT pins (EN_OUT1–EN_OUT4) support closed-loop tracking using external MOSFETs and feedback sense lines (e.g., GPIO1–GPIO4 as INS_ return paths). Six charge-pump-enabled EN_OUT outputs (EN_OUT1–EN_OUT6) drive external MOSFET gates up to VMON_ + 5.6V with 4.5–6µA pull-up current during transitions.

Key Specifications

Pinout & Package

MAX16046ETN+CK9 is housed in a 56-pin 8mm × 8mm TQFN package with exposed pad (EP), rated for θ_JA = 21°C/W and θ_JC = 1°C/W. The package supports reflow soldering at +260°C and lead-free assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16048ETN+, MAX16046ETN+CK9 provides 50% more monitoring/margining channels and full closed-loop tracking capability-critical for complex multi-rail servers. Versus TPS40400RHLR, it eliminates host dependency with autonomous EEPROM-based sequencing and integrated analog sensing, reducing system-level latency and firmware overhead.

Availability

MAX16046ETN+CK9 is available at Aetrix Electronics and suitable for servers, storage systems, networking equipment, and workstations requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for industrial and datacenter deployments.

Supply support for MAX16046ETN+CK9 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, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.

The MAX16046ETN+CK9 belongs to Maxim's EEPROM-programmable system manager product line, engineered specifically for autonomous, fault-resilient power sequencing and monitoring in high-availability infrastructure where deterministic behavior and nonvolatile event logging are mandatory.

FAQ

What is the primary function of the MAX16046ETN+CK9 in a server power architecture?

The MAX16046ETN+CK9 serves as the central autonomous power manager in server motherboards, performing real-time monitoring of up to 12 voltage rails via its 10-bit ADC, executing EEPROM-defined power-up/down sequences across 12 EN_OUT outputs, applying precise voltage margining through twelve 8-bit DACs, and logging faults to nonvolatile memory. Its closed-loop tracking capability on four channels ensures synchronized ramping of critical rails like CPU VDD and memory VDDQ, directly preventing latch-up and ensuring compliance with Intel VRD and AMD SVI2 specifications.

How does the MAX16046ETN+CK9 handle fault events and ensure diagnostic traceability?

The MAX16046ETN+CK9 includes a dedicated nonvolatile fault logger that records the first occurrence of any detected fault-including overvoltage, undervoltage, or tracking violation-into internal EEPROM. Upon fault assertion, it sets a lock bit to prevent accidental erasure during subsequent power cycles. Engineers can retrieve timestamped fault data, affected rail identifier, and threshold violation magnitude via I²C or JTAG, enabling root-cause analysis without requiring continuous host polling or external logging hardware.

Can the MAX16046ETN+CK9 be configured without host processor intervention?

Yes, the MAX16046ETN+CK9 supports fully autonomous operation after initial configuration. Its EEPROM stores all sequencing delays, voltage thresholds, DAC settings, GPIO modes, and fault response policies. Once programmed via I²C or JTAG, it executes power policies independently-no host firmware, driver, or runtime supervision is required. This makes it ideal for headless systems, secure boot environments, or designs where host processor initialization may lag behind power rail availability.

What are the key electrical differences between the MAX16046ETN+CK9 and MAX16048ETN+?

The MAX16046ETN+CK9 supports 12 monitored inputs (MON1–MON12), 12 DAC outputs (DACOUT1–DACOUT12), and 12 sequencing outputs (EN_OUT1–EN_OUT12), while the MAX16048ETN+ supports only 8 of each. In the 56-pin TQFN package, pins assigned to MON9–MON12, DACOUT9–DACOUT12, and EN_OUT9–EN_OUT12 are No Connect on MAX16048ETN+. Both share identical ADC accuracy (±0.75%FSR), DAC linearity (±0.9LSB INL), and operating temperature range (-40°C to +85°C).

Does the MAX16046ETN+CK9 support both I²C and JTAG interfaces simultaneously?

Yes, the MAX16046ETN+CK9 supports concurrent use of I²C/SMBus and JTAG interfaces. SCL/SDA and TCK/TMS/TDI/TDO operate independently-allowing I²C to handle runtime monitoring and fault reporting while JTAG is used for factory programming, boundary-scan testing, or debug access without disrupting system operation. Both interfaces provide full read/write access to all configuration registers, ADC results, DAC values, and fault log contents.