Analog Devices Inc./Maxim Integrated MAX1589ETT150+T

Overview

MAX1589ETT150+T from Maxim Integrated is a low-dropout linear regulator with integrated reset output, designed for battery-powered portable electronics. It delivers 500mA continuous output at 1.5V with ±0.5% initial accuracy, 175mV dropout at full load, and operates from 1.62V to 3.6V input - enabling operation down to single-cell Li-ion or NiMH end-of-life voltage. It serves as the primary core voltage supply in notebook computers and digital still cameras.

For engineers reviewing the MAX1589ETT150+T datasheet, MAX1589ETT150+T pinout, MAX1589ETT150+T application, or MAX1589ETT150+T equivalent, key selection criteria include guaranteed 500mA load capability under low-input-voltage conditions, active-low open-drain RESET timing (≥70ms delay), thermal-overload protection, and compatibility with 1µF/4.7µF ceramic bypass networks.

Technical Context

The MAX1589ETT150+T uses an internal P-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) to achieve low dropout and supply current independent of load or dropout voltage. Its error amplifier compares a trimmed bandgap reference against the internal feedback divider to regulate 1.5V output with high DC accuracy.

RESET functionality is implemented via a dedicated power-good comparator monitoring V_OUT, asserting active-low open-drain output when V_OUT falls below 82.5% of nominal (1.2375V) and holding for ≥70ms after regulation is achieved. Shutdown control is logic-level compatible (V_IL ≤ 0.6V, V_IH ≥ 1.4V) and reduces quiescent current to <1µA.

Key Specifications

Pinout & Package

MAX1589ETT150+T is housed in a 6-pin 3mm × 3mm thin DFN package with exposed paddle (EP) for thermal enhancement. The package height is <0.8mm, suitable for ultra-thin portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B152MR-G and ADP160ACBZ-1.5-R7, the MAX1589ETT150+T uniquely combines 500mA delivery, ±0.5% accuracy, 175mV dropout, and integrated RESET in a 3mm × 3mm DFN - making it the sole option meeting all four requirements simultaneously for space-constrained, battery-powered core-rail applications.

Availability

MAX1589ETT150+T is available at Aetrix Electronics and suitable for notebook computers, digital still cameras, cellular telephones, and PDAs requiring stable component supply across extended production lifecycles.

Supply support for MAX1589ETT150+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX1589 series was designed specifically for low-input-voltage, high-current portable electronics where battery life, board space, and power-supply sequencing are critical - targeting core voltage regulation in handheld computing and imaging devices.

FAQ

What is the exact output voltage and accuracy of the MAX1589ETT150+T?

The MAX1589ETT150+T provides a factory-preset 1.5V output with ±0.5% initial accuracy over temperature and load. This specification is guaranteed across the full operating range (−40°C to +85°C) and for output currents from 1mA to 500mA, ensuring reliable core voltage delivery without external trimming components.

Does the MAX1589ETT150+T require external capacitors, and what values are recommended?

Yes, the MAX1589ETT150+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values ensure stability across temperature and load, minimize output noise, and support fast transient response - deviations may cause oscillation or degraded regulation.

How does the RESET output of the MAX1589ETT150+T behave during power-up and brownout events?

The MAX1589ETT150+T RESET output is an active-low open-drain signal that asserts low when V_OUT falls below 82.5% of 1.5V (i.e., 1.2375V) and remains asserted for at least 70ms after V_OUT rises above regulation. It deasserts immediately upon shutdown or brownout, providing deterministic µP reset timing without external circuitry.

What thermal protection mechanisms are built into the MAX1589ETT150+T?

The MAX1589ETT150+T incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After shutdown, the device re-enables once the die cools by 15°C, resulting in pulsed output during sustained overload - preventing permanent damage while maintaining safe operating temperatures.

Can the MAX1589ETT150+T operate from a single-cell Li-ion battery throughout its discharge curve?

Yes, the MAX1589ETT150+T operates from 1.62V to 3.6V input and maintains 1.5V regulation with only 175mV dropout at 500mA. This allows continuous operation down to 1.675V input - well within the usable discharge range of a single Li-ion cell (typically 3.0V–2.7V nominal, down to ~2.5V before cutoff), maximizing battery utilization.