Analog Devices Inc./Maxim Integrated MAX8869EUE50+T

Overview

MAX8869EUE50+T from Maxim Integrated is a 1A, low-dropout linear regulator with fixed +5.0V 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 in notebook computers and telecom hardware where compact size and low quiescent current (500µA) are critical.

For engineers reviewing the MAX8869EUE50+T datasheet, MAX8869EUE50+T pinout, MAX8869EUE50+T application, or MAX8869EUE50+T equivalent, key selection criteria include guaranteed 1A output under 2.7V–5.5V input, 3ms reset assertion on undervoltage, adjustable soft-start via external capacitor, thermal shutdown at +170°C, and compatibility with low-ESR ceramic capacitors for high-frequency noise suppression.

Technical Context

The MAX8869EUE50+T uses an internal P-channel MOSFET pass transistor enabling low 500µA quiescent current and 200mV dropout at full 1A load. Its Dual Mode architecture selects between factory-preset +5.0V output (SET = GND) or adjustable mode (SET = external divider), with a precise 800mV internal reference and error amplifier feedback loop.

It integrates a 3ms reset timer triggered when VOUT falls below 92% of nominal, an open-drain RST output requiring external pull-up, and foldback current limiting (1.7A short-circuit, 4A in-regulation). Thermal protection disables the pass transistor above +170°C with ~20°C hysteresis.

Key Specifications

Pinout & Package

MAX8869EUE50+T is housed in a 16-pin TSSOP-EP package (3.1mm × 5.1mm × 1.1mm) with exposed thermal pad (EP) soldered to PCB ground plane for enhanced thermal dissipation (θJA ≈ 60°C/W with 1in² copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and ADM7172ACPZ-R7, the MAX8869EUE50+T uniquely combines fixed +5.0V output, integrated 3ms reset, 1µF stability, and 1.1mm TSSOP-EP packaging-making it optimal for space-constrained digital systems needing plug-and-play power with supervision.

Availability

MAX8869EUE50+T is available at Aetrix Electronics and suitable for telecom hardware, notebook computers, and industrial PLC I/O modules requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MAX8869EUE50+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 microcap-stable, high-current LDOs optimized for space-constrained, thermally demanding applications such as networking equipment and portable electronics where low dropout and fast transient response are essential.

FAQ

What is the maximum input voltage rating for the MAX8869EUE50+T?

The MAX8869EUE50+T has an absolute maximum input voltage of +6V referenced to GND. Its operational input range is +2.7V to +5.5V. Exceeding +6V may cause permanent damage. For reliable 5.0V output, VIN must remain ≥5.2V to maintain regulation given the 200mV dropout specification at 1A load.

Does the MAX8869EUE50+T require external resistors to set its output voltage?

No. The MAX8869EUE50+T is factory-configured for fixed +5.0V output. Its SET pin must be connected to GND to activate preset mode. External resistors are only needed if using adjustable mode (e.g., for nonstandard voltages), which is not applicable to the MAX8869EUE50+T variant.

How does the RST pin function on the MAX8869EUE50+T?

The RST pin on the MAX8869EUE50+T is an open-drain output that goes low when VOUT drops below 92% of its nominal +5.0V value (i.e., <4.6V), with ~3ms delay before asserting and ~3ms hold time after recovery. A 100kΩ pull-up resistor to VOUT is required to generate a valid logic-high signal for microcontroller reset inputs.

Can the MAX8869EUE50+T operate with a 1µF ceramic output capacitor?

Yes. The MAX8869EUE50+T is specifically designed for Microcap® stability and guarantees loop stability with a single 1µF low-ESR ceramic capacitor (≤60mΩ ESR, >5MHz SRF) on the OUT pin. This eliminates need for bulk electrolytic capacitors and simplifies layout in space-constrained designs.

What thermal considerations apply to the MAX8869EUE50+T in a 1A application?

At 1A and 5.5V input, power dissipation is ~0.5W (P = IOUT × (VIN − VOUT)). To maintain TJ < +150°C, the TSSOP-EP package requires adequate copper area: connect EP and GND pins to ≥1in² ground plane with multiple thermal vias. Thermal shutdown activates at +170°C, but continuous operation above +150°C risks reliability degradation.