Analog Devices Inc./Maxim Integrated MAX8869EUE25+

Overview

MAX8869EUE25+ from Maxim Integrated is a 1A, low-dropout linear regulator with fixed +2.5V output, Microcap® technology, ±1% output voltage accuracy, 200mV dropout at 1A, and stable operation with only 1µF output capacitance. It serves as a primary power supply for core logic rails in notebook computers and telecom hardware where compact size and low quiescent current are critical.

For engineers reviewing the MAX8869EUE25+ datasheet, MAX8869EUE25+ pinout, MAX8869EUE25+ application, or MAX8869EUE25+ equivalent, key selection considerations include guaranteed 1A continuous output, TSSOP-EP thermal performance, adjustable soft-start timing via external capacitor, and integrated reset output with 3ms delay and 8% VOUT trip threshold.

Technical Context

The MAX8869EUE25+ uses an internal P-channel MOSFET pass transistor enabling low 500µA quiescent current and 200mV dropout at full 1A load. Its Dual Mode architecture fixes output at +2.5V when SET is grounded, eliminating external feedback components.

It integrates a 0.8V reference, error amplifier, MOSFET driver, thermal shutdown (170°C), foldback current limiting (1.7A short-circuit / 4A in-regulation), and open-drain RST with 3ms release delay. The 16-pin TSSOP-EP package features an exposed pad for enhanced thermal dissipation (1.5W rating).

Key Specifications

Pinout & Package

The MAX8869EUE25+ is housed in a 16-pin TSSOP-EP (Exposed Pad) package measuring 5mm × 4.4mm × 1.1mm, rated for 1.5W continuous power dissipation and optimized for thermal transfer via soldered EP and GND pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and MCP1826T-2502E/DB, the MAX8869EUE25+ uniquely combines fixed +2.5V output, 1µF stability, integrated RST, and 200mV dropout in a thermally enhanced TSSOP-EP-making it optimal for compact, high-reliability digital power rails requiring fault signaling and minimal BOM.

Availability

MAX8869EUE25+ is available at Aetrix Electronics and suitable for telecom hardware, notebook computers, and industrial PLC modules requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MAX8869EUE25+ 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 demanding industrial, communications, and computing applications.

The MAX8869 product line delivers microcap-stable, high-current LDOs targeting space-constrained, thermally sensitive applications such as networking equipment and portable computing-where low dropout, low noise, and integrated protection are essential.

FAQ

What is the maximum continuous output current of the MAX8869EUE25+?

The MAX8869EUE25+ delivers 1A continuous output current across the full -40°C to +85°C operating temperature range, with thermal shutdown activation at +170°C junction temperature. At ambient temperatures ≤70°C and with proper PCB thermal design (exposed pad soldered to ground plane), the device sustains full 1A without derating. This makes MAX8869EUE25+ suitable for powering FPGA I/O banks and GPU memory interfaces where peak current demands exceed 800mA.

Does the MAX8869EUE25+ require external resistors to set its output voltage?

No, the MAX8869EUE25+ has a factory-preset +2.5V output. Its Dual Mode architecture automatically selects fixed-voltage regulation when the SET pin is connected to GND (impedance <10kΩ). External resistors are only needed if using the adjustable mode (VOUT = 0.8V × (1 + R1/R2)), which is not applicable to the MAX8869EUE25+ variant. This eliminates resistor matching tolerances and saves PCB area compared to adjustable LDOs.

How does the RST output function on the MAX8869EUE25+?

The RST output on the MAX8869EUE25+ is an open-drain signal that goes low when VOUT falls more than 8% below its nominal +2.5V value. It remains low for at least 3ms after VOUT recovers to within regulation, providing a clean power-on-reset pulse for microcontrollers. A 100kΩ pull-up resistor to VOUT is required to generate a logic-high level. RST stays asserted during shutdown and operates down to VIN = 1.0V, ensuring robust reset signaling across brownout conditions.

What type of output capacitor is required for stable operation of the MAX8869EUE25+?

The MAX8869EUE25+ requires a minimum 1µF ceramic output capacitor with low ESR (<60mΩ) and high self-resonant frequency (>5MHz) placed within 6mm of the OUT and GND pins. X5R or X7R dielectrics are recommended for stable capacitance across temperature and bias voltage. Larger values (e.g., 2.2µF) improve transient response but are not required for stability-unlike many competing LDOs that mandate ≥10µF tantalum capacitors.

Can the MAX8869EUE25+ be used in automotive applications?

The MAX8869EUE25+ is specified for industrial temperature range (-40°C to +85°C) and is not AEC-Q200 qualified. For automotive use, Maxim offers the pin-compatible MAX8869EUE25/V+, which undergoes extended temperature testing and qualification for under-hood and infotainment applications. Using MAX8869EUE25+ in automotive designs requires full system-level validation of reliability, including thermal cycling and vibration testing, as it lacks formal automotive qualification.