Analog Devices Inc./Maxim Integrated MAX8869EUE25+T

Overview

MAX8869EUE25+T 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 delivers regulated power in space-constrained telecom hardware and notebook computers where thermal efficiency and small footprint are critical.

For engineers reviewing the MAX8869EUE25+T datasheet, MAX8869EUE25+T pinout, MAX8869EUE25+T application, or MAX8869EUE25+T equivalent, key selection factors include guaranteed 1A continuous output, TSSOP-EP package thermal performance, adjustable soft-start timing, 3ms reset delay, and dual-mode SET input for preset/adjustable configuration flexibility.

Technical Context

The MAX8869EUE25+T integrates a P-channel MOSFET pass transistor enabling low 500µA quiescent current and dropout as low as 200mV at full load. Its internal 0.8V reference and error amplifier regulate output via either factory-preset internal feedback (SET = GND) or external resistor-divider (SET floating or biased).

Dual Mode logic selects regulation path based on SET voltage threshold (40–120mV), while RST provides open-drain power-on-reset with 8% VOUT undervoltage detection and 3ms release delay. Thermal shutdown activates at +170°C with ~20°C hysteresis.

Key Specifications

Pinout & Package

The MAX8869EUE25+T is housed in a 16-pin TSSOP-EP package (1.5W rating, 1.1mm height) with exposed thermal pad (EP) soldered to PCB ground plane for optimal thermal dissipation. Pin 10 is GND; EP is electrically connected to GND and must be thermally coupled to large copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4701RGWR and MCP1826T-2502E/OT, the MAX8869EUE25+T offers superior thermal efficiency in ultra-thin profiles, guaranteed 200mV dropout at full load, and integrated reset functionality - making it optimal for space-constrained, battery-aware, or telecom-grade +2.5V supply designs.

Availability

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

Supply support for MAX8869EUE25+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 computing markets.

The MAX8869 product line delivers high-current, low-dropout linear regulators with Microcap® stability and integrated protection features - designed specifically for next-generation portable and infrastructure equipment demanding compact size, low noise, and robust fault handling.

FAQ

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

The MAX8869EUE25+T delivers 1A continuous output current across the full operating temperature range (-40°C to +85°C) when properly heatsinked via its exposed pad and ground plane. At ambient temperatures above +70°C, derating applies per the 26.1mW/°C thermal coefficient specified in the Absolute Maximum Ratings table. The device also features foldback current limiting to protect against sustained short circuits.

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

No, the MAX8869EUE25+T is factory-configured for fixed +2.5V output. Its SET pin must be connected to GND to activate preset mode - no external resistors are needed. If used in adjustable mode (e.g., for custom voltages between +0.8V and +5.0V), an external resistor divider would be required, but that configuration does not apply to the MAX8869EUE25+T variant.

How does the RST output function on the MAX8869EUE25+T?

The RST output on the MAX8869EUE25+T is an open-drain signal that goes low when the +2.5V output drops more than 8% below nominal (i.e., below ~2.3V). It remains asserted for at least 3ms after VOUT recovers to regulation. A 100kΩ pull-up resistor to VOUT is required to generate a logic-high signal. This feature makes MAX8869EUE25+T suitable for microcontroller power-on-reset sequencing.

Can the MAX8869EUE25+T operate with input voltages below 2.7V?

No, the MAX8869EUE25+T has a minimum input voltage specification of +2.7V. Below this threshold, the device enters undervoltage lockout (UVLO) and ceases regulation. The UVLO threshold is typically 2.45V with ±100mV hysteresis, ensuring clean turn-on/turn-off behavior. Operating below 2.7V risks unstable output or complete shutdown.

What capacitor value is required for stable operation of the MAX8869EUE25+T?

The MAX8869EUE25+T is guaranteed stable with a minimum 1µF ceramic output capacitor (low-ESR, >5MHz SRF) placed within 6mm of the OUT and GND pins. Input capacitance of ≥1µF is also required at the IN pins. Larger values improve PSRR and transient response but are not necessary for basic stability - a key advantage of its Microcap® architecture over legacy LDOs requiring 10–22µF tantalum capacitors.