Analog Devices Inc./Maxim Integrated MAX16048ETN+

Overview

The MAX16048ETN+ from Maxim Integrated is an 8-channel EEPROM-configurable system manager IC that monitors, sequences, tracks, and margins power supplies in complex digital systems. It integrates a 1% accurate 10-bit ADC (for 8 monitored inputs), eight 8-bit DACs for supply margining, six GPIOs, dual I²C/JTAG interfaces, and nonvolatile fault logging - enabling precise power-up/down control and failure diagnostics in server and telecom infrastructure.

For engineers reviewing the MAX16048ETN+ datasheet, MAX16048ETN+ pinout, MAX16048ETN+ application, or MAX16048ETN+ equivalent, this device delivers deterministic sequencing of up to eight supplies, closed-loop tracking on four channels, configurable fault outputs with EEPROM-persistent event logging, and ±0.75% ADC total unadjusted error across –40°C to +85°C - critical for high-availability power management validation.

Technical Context

The MAX16048ETN+ implements a hierarchical power management architecture: its 10-bit ADC samples all eight MON_ inputs in ≤100 µs per full cycle, comparing each against independently programmable upper/low/selectable thresholds; fault detection triggers configurable EN_OUT_ or GPIO outputs with lock-bit-protected EEPROM storage of failure context. Its sequencer supports both fixed-order and dependency-based timing, with slew-rate programmability (80–960 V/s) and voltage-dependent tracking windows (±150 mV differential).

Configuration is persistent via 100 bytes of internal EEPROM, supporting runtime reprogramming over I²C (400 kHz SMBus-compatible) or JTAG; DAC outputs are calibrated to ±0.9% gain error and settle in 50 µs, while charge-pump EN_OUT1–EN_OUT6 deliver VMON_ + 5.1 V (typ) to drive external MOSFET gates without external level-shifting circuitry.

Key Specifications

Pinout & Package

The MAX16048ETN+ is housed in a 56-pin 8mm × 8mm TQFN package with exposed pad (EP), optimized for thermal dissipation (θ_JA = 21°C/W). Pin functions are EEPROM-configurable, with dedicated roles for monitoring, sequencing, margining, and system signaling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16046ETN+, the MAX16048ETN+ reduces channel count but maintains identical sequencing precision, tracking capability, and EEPROM reliability - making it ideal for cost-sensitive 8-rail deployments. Against TPS40400RHLR, it provides standalone fault resilience and hardware margining absent host dependency.

Availability

The MAX16048ETN+ is available at Aetrix Electronics and suitable for servers, telecom line cards, and storage systems requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C operation.

Supply support for MAX16048ETN+ 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications - emphasizing integration, reliability, and thermal efficiency.

The MAX16048ETN+ belongs to Maxim's EEPROM-programmable system manager product line, engineered specifically for autonomous, fault-aware power sequencing and margining in mission-critical computing infrastructure.

FAQ

What is the maximum number of voltage rails the MAX16048ETN+ can monitor and sequence?

The MAX16048ETN+ monitors and sequences up to eight voltage rails. It features eight dedicated MON_ inputs (MON1–MON8) and eight corresponding EN_OUT outputs (EN_OUT1–EN_OUT8), with EN_OUT1–EN_OUT4 supporting closed-loop tracking and EN_OUT1–EN_OUT6 offering charge-pump gate drive capability. This matches the device's 8-channel designation in the MAX16046/MAX16048 family datasheet.

Does the MAX16048ETN+ support both I²C and JTAG interfaces simultaneously?

Yes, the MAX16048ETN+ supports concurrent I²C (SMBus-compatible, 400 kHz) and JTAG (IEEE 1149.1) interfaces. Both provide full read/write access to configuration registers, ADC results, DAC settings, and fault log data. The interfaces operate independently - enabling debug via JTAG while production firmware uses I²C for runtime margining and monitoring.

How does the nonvolatile fault logger in the MAX16048ETN+ preserve data during power loss?

The MAX16048ETN+ fault logger writes failure context - including triggering rail, timestamp, voltage value, and threshold violation type - into internal EEPROM with automatic lock-bit activation upon first write. This prevents accidental overwrite during subsequent power cycles. Data remains intact for ≥100 years at +25°C and survives >100,000 write/erase cycles, ensuring forensic integrity without external backup power.

Can the MAX16048ETN+ perform closed-loop tracking without external components?

No - closed-loop tracking requires external series MOSFETs and feedback resistors. The MAX16048ETN+ provides the control logic and sense inputs (e.g., GPIO1–GPIO4 configurable as return sense lines), but the power path and regulation loop are implemented externally. The IC measures the tracked rail via MON_ inputs and adjusts EN_OUT signals to maintain voltage alignment within ±150 mV.

What is the operating voltage range for the VCC supply of the MAX16048ETN+?

The MAX16048ETN+ operates from a single VCC supply ranging from 3V to 14V. Its undervoltage lockout (UVLO) activates below 2.85V (typ), and the device guarantees full functionality across the entire industrial temperature range (–40°C to +85°C) within this supply window. Internal regulators (DBP and ABP) derive stable 2.7V and 2.85V rails for logic and analog blocks.