Analog Devices Inc./Maxim Integrated MAX1792EUA33/V+T

Overview

MAX1792EUA33/V+T from Maxim Integrated is a 3.3V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 130mV dropout at full load, and active-low open-drain reset output with 4ms timeout-designed for power management in automotive-grade portable electronics including USB hubs, docking stations, and base station subsystems.

For engineers reviewing the MAX1792EUA33/V+T datasheet, MAX1792EUA33/V+T pinout, MAX1792EUA33/V+T application, or MAX1792EUA33/V+T equivalent, key selection criteria include guaranteed 500mA output under automotive temperature range (−40°C to +85°C), 0.1µA shutdown current, thermal shutdown at 170°C, and compatibility with 3.3µF low-ESR output capacitors for stable regulation in space-constrained designs.

Technical Context

The MAX1792EUA33/V+T employs an internal PMOS pass transistor with 0.25Ω R_DS(ON), enabling low quiescent current (80µA typical) independent of load and eliminating base-drive losses common in PNP-based regulators. Its Dual Mode™ architecture selects between factory-trimmed 3.3V output and adjustable mode via the SET pin based on V_SET threshold detection.

Regulation relies on a 1.25V internal reference compared against feedback from either internal resistive divider (for preset mode) or external resistor network (for adjustable mode). The error amplifier drives the PMOS gate to maintain output within ±1% over load (1mA–500mA), line (2.5V–5.5V input), and temperature (−40°C to +85°C) variations.

Key Specifications

Pinout & Package

The MAX1792EUA33/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. GND and EP must be soldered to PCB ground plane using multiple vias for optimal thermal performance and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79633DRBR and MCP1826-3302E/DB, the MAX1792EUA33/V+T uniquely combines automotive temperature rating, integrated RST with programmable delay, and PMOS-based low-IQ design-making it optimal for space- and reliability-constrained portable infrastructure where self-contained power supervision is critical.

Availability

MAX1792EUA33/V+T is available at Aetrix Electronics and suitable for automotive infotainment systems, portable docking stations, and small-cell base station power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1792EUA33/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 MAX1792EUA33/V+T belongs to Maxim's µMAX low-dropout regulator family, engineered specifically for battery-powered and automotive systems needing high accuracy, low quiescent current, and integrated fault protection in miniature packages.

FAQ

What is the operating temperature range for MAX1792EUA33/V+T?

The MAX1792EUA33/V+T is qualified for −40°C to +85°C ambient operation, meeting automotive-grade reliability requirements. This range is explicitly defined in the Ordering Information section and confirmed in Absolute Maximum Ratings and Electrical Characteristics tables across all key parameters including output voltage accuracy, dropout, and reset behavior.

Does MAX1792EUA33/V+T require external components for stability?

Yes, the MAX1792EUA33/V+T requires 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; omitting them risks oscillation or poor transient response, as verified in the Applications Information and Typical Operating Characteristics sections.

How does the RST pin function on MAX1792EUA33/V+T?

The RST pin on MAX1792EUA33/V+T is an open-drain active-low output that asserts low when VOUT falls below 93% of 3.3V (i.e., 3.069V) and remains low for ≥4ms after VOUT recovers. It must be pulled up externally-typically with a 100kΩ resistor to OUT-to generate a valid logic-high signal for microcontroller power-on reset.

Can MAX1792EUA33/V+T be used in adjustable-output configurations?

No-MAX1792EUA33/V+T is factory-trimmed for fixed 3.3V output only. While the underlying MAX1792 family supports adjustable mode via the SET pin, the /V+T suffix and top-mark "AACP" confirm this variant is preset-only. Attempting external feedback will not alter the output voltage, as confirmed in the Selector Guide and Pin Description.

What thermal management is required for MAX1792EUA33/V+T at full load?

At 500mA and 1.3V dropout (VIN = 4.6V), MAX1792EUA33/V+T dissipates ~0.65W. To stay within its 1.3W maximum power limit and avoid thermal shutdown, the exposed pad (EP) and GND pin must be soldered to a minimum 200mm² copper area connected to inner ground planes via ≥4 thermal vias-per Package Information and Thermal Overload Protection sections.