Analog Devices Inc./Maxim Integrated MAX14572EUD+T

Overview

The MAX14572EUD+T from Maxim Integrated is a latch-off overvoltage and overcurrent protection IC designed for high-reliability industrial power rail protection. It features 100mΩ (typ) internal FETs, factory-preset 33V (typ) OVLO and 19.2V (typ) UVLO thresholds, programmable current limiting up to 4.2A, and thermal shutdown at +150°C (typ). It operates across 4.5V–36V input and withstands ±40V fault transients, making it suitable for ruggedized industrial equipment with inductive loads.

For engineers reviewing the MAX14572EUD+T datasheet, MAX14572EUD+T pinout, MAX14572EUD+T application, or MAX14572EUD+T equivalent, this page delivers verified functional behavior, exact pin roles, latch-off fault response timing (20.7ms blanking, permanent shutdown until EN/HVEN toggle), reverse-current enable capability via RIEN, and real-world design meaning for each specification - all confirmed against Maxim's official datasheet Rev 4 (7/17).

Technical Context

The MAX14572EUD+T implements a latch-off overcurrent response: upon sustained overload exceeding the SETI-programmed threshold for ≥20.7ms (typ), it permanently disables the internal FETs until EN or HVEN is cycled. Its dual enable architecture (active-high EN and active-low HVEN) allows independent control of power sequencing and fault reset, while the RIEN pin enables reverse-current flow for inductive load freewheeling.

Overvoltage and undervoltage lockout are configurable via external resistor dividers on OVLO and UVLO pins, or use factory presets (33V OVLO, 19.2V UVLO) when those pins are grounded. The device integrates thermal shutdown at +150°C (typ) with 30°C hysteresis and provides open-drain FLAG assertion for all fault conditions - including OVLO/UVLO violation, thermal trip, reverse-current detection, or SETI-to-GND short.

Key Specifications

Pinout & Package

Package: 14-pin TSSOP-EP (5mm × 6.5mm) with exposed pad connected to GND for thermal enhancement. RoHS-compliant, rated for -40°C to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage and overcurrent protection applications.

Compared with MAX14571EUD+T (autoretry) and MAX14573EUD+T (continuous limit), the MAX14572EUD+T provides definitive fault containment - its latch-off behavior ensures no power resumes until a deliberate system-level reset occurs, meeting strict fail-safe requirements in industrial control and marine electronics.

Availability

The MAX14572EUD+T is available at Aetrix Electronics and suitable for industrial motor drives, marine navigation systems, battery-powered test equipment, and factory automation PLC I/O modules requiring stable component supply across extended temperature and high-reliability environments.

Supply support for MAX14572EUD+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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAX14572EUD+T belongs to Maxim's adjustable overvoltage/overcurrent protection product line, engineered specifically for robust front-end power rail protection in harsh environments where latch-off fault response, ±40V fault tolerance, and reverse-current flexibility are critical.

FAQ

What fault conditions cause the MAX14572EUD+T to latch off?

The MAX14572EUD+T latches off when an overcurrent condition persists beyond the 20.7ms (typ) blanking time, or when the junction temperature exceeds +150°C (typ). It also asserts FLAG and disables output for OVLO/UVLO violations, reverse-current detection (if RIEN = high), or when SETI is shorted to GND. Latch-off remains active until EN or HVEN is toggled - no automatic recovery occurs.

How do I configure the MAX14572EUD+T for a 28V overvoltage lockout threshold?

To set OVLO = 28V, connect a resistor divider between IN and GND with OVLO pin tied to the midpoint. Using V_BG = 1.21V (typ) and R3 = 2.2MΩ (recommended), calculate R4 ≈ 452kΩ via V_OVLO = V_BG × (1 + R3/R4). Confirm with actual resistor tolerances and validate using the MAX14572EUD+T's ±3% OVLO accuracy spec - no reprogramming or calibration is required.

Does the MAX14572EUD+T support reverse current flow from OUT to IN?

Yes - the MAX14572EUD+T supports reverse current flow when the RIEN pin is driven low (logic 0). This disables internal reverse-blocking circuitry, allowing current to flow from OUT to IN. This feature is essential for inductive load applications (e.g., solenoids, relays) where energy recovery during turn-off prevents damaging voltage spikes.

What is the purpose of the HVEN pin on the MAX14572EUD+T, and how does it differ from EN?

HVEN is an active-low, high-voltage-capable enable input that withstands up to +36V - eliminating the need for external level-shifting circuitry when interfacing with 24V control signals. EN is a standard active-high logic input (VIH ≥ 1.4V). Both can independently reset the latch-off state, but HVEN enables direct integration into higher-voltage industrial control buses without additional components.

Can the MAX14572EUD+T replace the MAX14571EUD+T without hardware changes?

No - although pin-compatible and sharing identical package and basic functionality, the MAX14572EUD+T's latch-off overcurrent response differs fundamentally from the MAX14571EUD+T's autoretry behavior. Substituting them requires validation of system-level fault recovery strategy; unintended permanent shutdown may occur if the application expects automatic retry after transient overloads.