Analog Devices Inc./Maxim Integrated MAX16166AWPH+T

Overview

MAX16166AWPH+T from Analog Devices is a highly integrated 4-channel power-supply sequencer and supervisor IC with push-pull outputs, monitoring up to five voltages (including VDD), operating from 2.7V to 16V, featuring capacitor-adjustable sequencing delay (tDLY), resistor-configurable on/off thresholds (0.5V nominal), and -40°C to +125°C operation - used in FPGA/ASIC multi-rail power-up coordination.

For engineers reviewing the MAX16166AWPH+T datasheet, MAX16166AWPH+T pinout, MAX16166AWPH+T application, or MAX16166AWPH+T equivalent, key selection considerations include push-pull output drive capability (3.2mA sink, 1mA source), ABP-regulated internal supply (2.45–3.20V, >1mA available), FAULT bidirectional fault signaling, daisy-chain scalability, and precise 0.5V threshold matching across all SET_/UVSET inputs.

Technical Context

The MAX16166AWPH+T implements a deterministic state-machine-based sequencing controller that initiates power-on upon ON input rising edge and power-off upon OFF input falling edge. It uses four independent 0.5V-comparator inputs (SET1–SET4) for voltage monitoring and UVSET for VDD undervoltage detection, each with 1% hysteresis and 20ppm/°C tempco.

Sequencing timing is controlled by external capacitors on DLY (adjustable delay between outputs) and PGT (power-good timeout per channel), while power-off sequencing injects programmable offset current (0.5–50μA via IOS resistor) into SET pins to ensure clean rail collapse. The device integrates an internal linear regulator (ABP) and supports unlimited daisy-chaining via FAULT pin coupling.

Key Specifications

Pinout & Package

MAX16166AWPH+T is packaged in a 1.63mm × 2.03mm, 20-bump Wafer-Level Package (WLP) with bottom-side bump layout. Pin mapping follows JEDEC-standard W201C2+2 outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply sequencing applications.

Compared with MAX16165AWPH+T, the MAX16166AWPH+T eliminates external pull-ups and improves noise immunity; versus TPS65400RGER, it delivers finer-grained timing control, higher temperature rating (+125°C vs. +85°C), and modular expansion via daisy-chaining - critical for high-reliability multi-rail systems.

Availability

MAX16166AWPH+T is available at Aetrix Electronics and suitable for FPGA/ASIC power sequencing, industrial motor controls, and networking equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16166AWPH+T 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX16166AWPH+T belongs to Analog Devices' precision power-supply supervision and sequencing product line, designed specifically for reliable, scalable, and temperature-robust coordination of multi-rail power systems in mission-critical embedded applications.

FAQ

What is the function of the ABP pin on the MAX16166AWPH+T?

The ABP pin on the MAX16166AWPH+T is the output of an internal linear regulator, delivering 2.45V to 3.20V at up to 1mA load. It powers internal circuitry and can supply >1mA of auxiliary current to external bias networks or level-shifters. ABP must be bypassed with a 1μF capacitor to GND and must never be left floating or shorted.

How does the MAX16166AWPH+T handle power-off sequencing?

The MAX16166AWPH+T performs reverse-order power-off: upon OFF input falling edge, it disables OUT4 first, then OUT3, OUT2, and finally OUT1 - each with user-defined delay (via DLY capacitor). During shutdown, it injects programmable offset current (set by IOS resistor) into each SET pin to ensure controlled rail collapse and avoid latch-up.

Can the MAX16166AWPH+T monitor more than four voltage rails?

Yes - the MAX16166AWPH+T monitors up to five voltages: four via SET1–SET4 and one via UVSET (typically VDD). While it sequences only four outputs (OUT1–OUT4), the fifth input allows simultaneous supervision of the main supply or auxiliary rail without consuming a sequencing channel.

What is the purpose of the FAULT pin on the MAX16166AWPH+T?

The FAULT pin on the MAX16166AWPH+T is a bidirectional active-low signal: it asserts low during internal faults (e.g., undervoltage, timeout) and also accepts external low signals to immediately disable all outputs and reset the state machine. In daisy-chained systems, connecting FAULT pins ensures synchronized fault response across multiple devices.

Does the MAX16166AWPH+T require external components for basic operation?

Yes - the MAX16166AWPH+T requires a 0.1μF capacitor on VDD, a 1μF capacitor on ABP, and external resistive dividers on each SET/UVSET input to scale rail voltages to 0.5V. For timing, DLY and PGT pins need capacitors to GND (optional but recommended); IOS requires a resistor to GND for power-off current programming.