Analog Devices Inc./Maxim Integrated MAX16065ETM+TCDL

Overview

MAX16065ETM+TCDL from Maxim Integrated is a 12-channel flash-configurable system manager IC that monitors, sequences, and protects complex power systems. It integrates a ±2.5% accurate high-side current-sense amplifier, a 1% accurate 10-bit SAR ADC, nonvolatile fault logging, SMBus/JTAG configuration, and charge-pump outputs (EN_OUT1–EN_OUT8) for driving external n-channel MOSFETs - deployed in server power sequencing and telecom base station supervision.

For engineers reviewing the MAX16065ETM+TCDL datasheet, MAX16065ETM+TCDL pinout, MAX16065ETM+TCDL application, or MAX16065ETM+TCDL equivalent, key selection considerations include 12-voltage monitoring capability, flash-stored sequencing order with per-slot delays up to 1.6 s, nonvolatile fault event capture during shutdown, and dual-sequence group support for primary/secondary power domains.

Technical Context

The MAX16065ETM+TCDL implements a dual-block sequencer architecture: a primary sequence block (Slots 1–12) controlled by EN and software enable bit r73h[0], and a secondary sequence block initiated via r73h[1] or GPIO-configured EN2. Each slot supports programmable delays (20 μs to 1.6 s) and independent voltage monitoring with overvoltage, undervoltage, and early-warning thresholds stored in flash.

Its analog front-end includes a selectable single-ended/differential 10-bit ADC with 1 LSB = 1.36 mV (5.56 V range), integrated high-side current sensing (CSP/CSM inputs), and internal ABP/DBP regulators (3.0 V typ) powering analog/digital circuitry and charge-pump outputs. Fault response includes up to three configurable fault outputs, lock-protected nonvolatile fault memory, and automatic fault-triggered shutdown with data retention.

Key Specifications

Pinout & Package

MAX16065ETM+TCDL is housed in a 48-pin, 7 mm × 7 mm TQFN-EP package with exposed pad connected internally to GND. Pin functions are validated per Maxim's official pin description table and functional diagram.

Key Features

Applications

Availability

MAX16065ETM+TCDL is available at Aetrix Electronics and suitable for server power sequencing, telecom base station supervision, storage RAID controller monitoring, and industrial edge compute platforms requiring stable component supply and long-term lifecycle support.

Supply support for MAX16065ETM+TCDL 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 MAX16065ETM+TCDL belongs to Maxim's flash-configurable system manager product line, engineered specifically for high-reliability power sequencing, fault logging, and multi-rail supervision in dense, thermally constrained systems like servers and 5G infrastructure.

FAQ

What is the maximum number of voltage rails the MAX16065ETM+TCDL can monitor and sequence?

The MAX16065ETM+TCDL monitors up to twelve voltage inputs (MON1–MON12) and sequences up to twelve power supplies via its EN_OUT1–EN_OUT12 outputs. This 12-channel capability is fixed for the MAX16065 variant; the pin-compatible MAX16066 supports eight channels. All sequencing parameters - including slot assignment, per-slot delays, and voltage thresholds - are stored in nonvolatile flash memory.

Does the MAX16065ETM+TCDL support high-side current sensing, and what is its accuracy?

Yes, the MAX16065ETM+TCDL integrates a dedicated high-side current-sense amplifier with CSP and CSM inputs. Its current measurement accuracy is ±2.5% at 150 mV input with gain = 6, and it maintains ≥80 dB common-mode and power-supply rejection ratios. The device supports four programmable gain settings (6/12/24/48) to optimize resolution across 10–232 mV sensed voltage ranges.

How does the nonvolatile fault logger in the MAX16065ETM+TCDL operate during a system shutdown?

During a fault-induced or uncontrolled shutdown, the MAX16065ETM+TCDL automatically writes fault flags, monitored channel voltages, failing sequencer slot ID, and timestamp-equivalent status to internal flash memory. A lock bit is then set to prevent accidental erasure. This logged data remains intact across power cycles and can be read back via SMBus or JTAG for failure analysis without requiring external memory.

Can the MAX16065ETM+TCDL drive n-channel MOSFETs directly, and which pins support this?

Yes - EN_OUT1 through EN_OUT8 on the MAX16065ETM+TCDL feature an integrated charge-pump circuit that generates +10 V above GND, enabling direct gate drive of standard n-channel MOSFETs without external level shifters. These outputs sink up to 10 mA and are configurable as push-pull or open-drain. EN_OUT9–EN_OUT12 lack charge-pump capability and are intended for lower-voltage signaling.

What interfaces does the MAX16065ETM+TCDL support for configuration and monitoring?

The MAX16065ETM+TCDL supports two independent serial interfaces: SMBus (400 kHz, with 25–35 ms timeout detection) and IEEE 1149.1 JTAG. Both provide full access to configuration registers, flash memory, and real-time monitoring data. Only one interface may be active at a time; they share no pins and require no hardware arbitration.