Analog Devices Inc./Maxim Integrated MAX1792EUA25/V+T

Overview

MAX1792EUA25/V+T from Maxim Integrated is a 2.5V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 130mV dropout at full load, and integrated active-low open-drain reset output with 4ms timeout. It features an internal PMOS pass transistor, 80µA ground current, and 0.1µA shutdown current, designed for space-constrained battery-powered systems including notebook computers and cellular handsets.

For engineers reviewing the MAX1792EUA25/V+T datasheet, MAX1792EUA25/V+T pinout, MAX1792EUA25/V+T application, or MAX1792EUA25/V+T equivalent, key selection criteria include guaranteed 500mA output under 130mV dropout, automotive-grade qualification (-40°C to +85°C), Power-µMAX package thermal performance, and RST functionality for power-on-reset signaling in portable embedded systems.

Technical Context

The MAX1792EUA25/V+T implements a P-channel MOSFET pass element with 0.25Ω R_DS(ON), enabling low dropout and load-independent 80µA quiescent current. Its Dual Mode™ architecture selects between factory-trimmed 2.5V output (SET tied to GND) and adjustable mode via external resistor divider, with V_SET threshold of 1.25V ±1.5%.

It integrates thermal shutdown at +170°C with 20°C hysteresis, short-circuit protection limiting output to 0.55–1.8A, and a precision reset comparator monitoring V_OUT against 90–96% of nominal voltage, asserting RST low until 4ms after regulation recovery.

Key Specifications

Pinout & Package

The MAX1792EUA25/V+T is housed in an 8-pin Power-µMAX package (U8E+2 outline) with exposed thermal pad (EP) on underside for enhanced heat dissipation. The package measures 3.0mm × 3.0mm × 0.8mm and requires soldering of EP and GND pins to PCB ground plane for optimal thermal performance (θ_JA reduced significantly).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS7A2025PDQNR and MCP1825-2502E/DB, the MAX1792EUA25/V+T uniquely combines automotive qualification, integrated RST with programmable timing, and 130mV dropout at 500mA-enabling higher efficiency and simplified system-level reset architecture in portable industrial and communications equipment.

Availability

MAX1792EUA25/V+T is available at Aetrix Electronics and suitable for notebook computers, cellular handsets, and industrial PDAs requiring stable component supply with automotive-grade reliability and long-term production continuity.

Supply support for MAX1792EUA25/V+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, designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX1792 series was developed specifically for battery-powered portable electronics requiring ultra-low quiescent current, tight output regulation, and integrated system supervision functions like reset generation.

FAQ

What is the maximum input voltage supported by the MAX1792EUA25/V+T?

The MAX1792EUA25/V+T supports an absolute maximum input voltage of +6V, but its operational input range is specified from +2.5V to +5.5V. Operation above +5.5V risks permanent damage, and the device incorporates input undervoltage lockout (UVLO) that disables regulation below +2.0V to +2.3V, ensuring clean startup behavior. This range makes the MAX1792EUA25/V+T compatible with common single-cell Li-ion batteries and standard 3.3V/5V system rails.

Does the MAX1792EUA25/V+T require external components for stable operation?

Yes, the MAX1792EUA25/V+T requires two external capacitors: a 1µF ceramic capacitor between IN and GND, and a 3.3µF low-ESR (≤0.1Ω) ceramic capacitor between OUT and GND. These are mandatory for stability across temperature and load conditions. The datasheet confirms stability with these values and warns that ESR outside the validated region may cause oscillation. No additional resistors or compensation networks are needed for the fixed 2.5V configuration.

How does the RST pin function on the MAX1792EUA25/V+T?

The RST pin on the MAX1792EUA25/V+T is an open-drain, active-low output that asserts low when V_OUT falls below 90–96% of its nominal 2.5V value and remains low for a guaranteed minimum of 4ms after V_OUT recovers to regulation. To generate a logic-high signal, a pullup resistor (e.g., 100kΩ to OUT) is required. During shutdown, RST is forcibly held low regardless of output voltage, providing predictable system reset behavior in all operating modes.

Is the MAX1792EUA25/V+T pin-compatible with other variants in the MAX1792 family?

Yes, all MAX1792 variants-including MAX1792EUA25/V+T-share identical Power-µMAX-8 (U8E+2) packaging, pinout, and footprint. The /V+T suffix denotes automotive qualification and tape-and-reel packaging, but electrical pin functions (IN, RST, SHDN, GND, SET, OUT) and mechanical dimensions remain unchanged across the family. This allows direct substitution between voltage options (e.g., 1.8V, 2.5V, 3.3V) without PCB redesign.

What thermal performance can be expected from the MAX1792EUA25/V+T in a typical PCB layout?

With proper layout-specifically soldering both the GND pin and exposed thermal pad (EP) to a minimum 100mm² copper area-the MAX1792EUA25/V+T achieves a thermal resistance (θ_JA) low enough to sustain 1.3W continuous power dissipation at +70°C ambient. At full 500mA load with 1V input-output differential, power dissipation is 500mW; combined with the 80µA ground current, total dissipation remains well within safe limits when the EP is correctly thermally anchored to the PCB ground plane.