Analog Devices Inc./Maxim Integrated MAX1589AETT180+T

Overview

MAX1589AETT180+T from Maxim Integrated is a low-dropout linear regulator with 1.8V preset output, delivering 500mA continuous current from 1.62V–3.6V input, featuring ±0.5% initial accuracy, 175mV dropout at full load, and integrated active-low open-drain RESET flag for microprocessor supervision in portable battery-powered systems.

For engineers reviewing the MAX1589AETT180+T datasheet, MAX1589AETT180+T pinout, MAX1589AETT180+T application, or MAX1589AETT180+T equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for power-rail design in space-constrained, low-voltage embedded systems.

Technical Context

The MAX1589AETT180+T uses an internal p-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) to achieve low dropout and supply-current independence from load and input-output differential voltage. Its error amplifier compares a trimmed bandgap reference against feedback from an internal voltage divider to regulate the 1.8V output with high DC accuracy.

RESET assertion is controlled by a dedicated power-good comparator monitoring V_OUT; it remains low for ≥70ms after regulation is achieved and falls immediately if V_OUT drops below 82.5% of nominal. Thermal shutdown activates at +165°C with 15°C hysteresis, enabling pulsed operation under sustained overload.

Key Specifications

Pinout & Package

MAX1589AETT180+T is packaged in a 6-pin, 3mm × 3mm thin DFN with exposed thermal pad (EP), optimized for high-power-density PCB layouts and enhanced thermal dissipation in compact portable devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MAX1589AETT180+T, TPS7A2018PDQNR trades 200mA current headroom and reset integration for nanoamp IQ, while MCP1825-1802E/DB matches current capability but sacrifices both reset functionality and 75mV dropout advantage - making MAX1589AETT180+T optimal for reset-critical, high-efficiency 1.8V portable rails.

Availability

MAX1589AETT180+T is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, and cellular handsets requiring stable component supply, long-lifecycle support, and lead-free packaging compliance.

Supply support for MAX1589AETT180+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, communications, and consumer applications.

The MAX1589A product line delivers low-input-voltage, high-accuracy LDO regulators with integrated reset for battery-powered portable electronics - designed to maximize runtime, simplify power sequencing, and minimize board area.

FAQ

What is the exact output voltage of the MAX1589AETT180+T?

The MAX1589AETT180+T delivers a factory-trimmed, fixed 1.8V output voltage with ±0.5% initial accuracy across temperature and load. This value is confirmed in the Selector Guide (suffix "180") and Electrical Characteristics table, and does not require external feedback components. The MAX1589AETT180+T maintains this precision under 1.62V–3.6V input and 0–500mA load conditions.

Does the MAX1589AETT180+T include a reset output, and how does it behave?

Yes, the MAX1589AETT180+T features an active-low, open-drain RESET output that asserts during power-up, brownout, and shutdown. It remains low for at least 70ms after V_OUT reaches regulation and falls immediately if V_OUT drops below 82.5% of nominal. The MAX1589AETT180+T RESET pin requires an external pull-up resistor to interface with microprocessor reset inputs.

What package type and dimensions does the MAX1589AETT180+T use?

The MAX1589AETT180+T uses a 6-pin thin DFN package measuring 3mm × 3mm × 0.8mm with an exposed thermal pad (EP). Per Maxim's Package Information, the EP must be soldered to a PCB ground plane to achieve rated thermal performance and 1.951W maximum power dissipation at +70°C ambient. The "TT" in the part number explicitly denotes the TDFN variant.

What is the dropout voltage specification for the MAX1589AETT180+T at full load?

The MAX1589AETT180+T exhibits a guaranteed 175mV dropout voltage at 500mA load and V_OUT ≥ 1.8V, defined as V_IN – V_OUT when V_OUT is 4% below its nominal value. This low dropout enables operation from as low as 1.975V input, critical for extending runtime in single-cell Li-ion applications where the MAX1589AETT180+T is commonly deployed.

How does the MAX1589AETT180+T handle thermal overload conditions?

The MAX1589AETT180+T incorporates thermal-overload protection that disables the p-channel pass transistor when junction temperature exceeds +165°C. After cooling by 15°C, the device automatically resumes regulation, resulting in pulsed output during sustained overload. This self-protecting behavior prevents permanent damage and allows safe operation in thermally constrained enclosures where the MAX1589AETT180+T is often used.