Analog Devices Inc./Maxim Integrated MAX8869EUE10+T

Overview

MAX8869EUE10+T from Maxim Integrated is a 1A, low-dropout linear regulator with fixed +1.0V output, operating from +2.7V to +5.5V input, featuring ±1% output voltage accuracy, 200mV dropout at 1A, and stability with only 1µF output capacitance. It delivers regulated power for core logic rails in notebook computers and telecom hardware where compact size and low quiescent current are critical.

For engineers reviewing the MAX8869EUE10+T datasheet, MAX8869EUE10+T pinout, MAX8869EUE10+T application, or MAX8869EUE10+T equivalent, key selection factors include guaranteed 1A output under 200mV dropout, adjustable soft-start via external capacitor, 3ms reset assertion delay, thermal shutdown at +170°C, and compatibility with low-ESR ceramic capacitors down to 1µF.

Technical Context

The MAX8869EUE10+T uses an internal P-channel MOSFET pass transistor enabling 500µA quiescent current and eliminating base-drive losses typical of PNP-based LDOs. Its Dual Mode architecture selects between factory-preset +1.0V output (SET tied to GND) and adjustable mode (SET biased externally), 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 that reduces short-circuit current from 4A to 1.7A upon 8% VOUT drop. Thermal protection disables the pass transistor above +170°C with ~20°C hysteresis.

Key Specifications

Pinout & Package

MAX8869EUE10+T is housed in a 16-pin TSSOP-EP package (1.5W power rating, 30% smaller than SOT223, 1.1mm height) with exposed thermal pad (EP) soldered to PCB ground plane for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS7A4700RGWR and MCP1826T-1002E/DB, the MAX8869EUE10+T uniquely combines fixed 1.0V output, 200mV dropout, integrated RST with 3ms delay, and Microcap® 1µF stability in a thermally optimized TSSOP-EP-making it optimal for space-constrained, high-reliability embedded systems demanding predictable power sequencing and fault response.

Availability

MAX8869EUE10+T is available at Aetrix Electronics and suitable for notebook computers, telecom line cards, mobile base station RF front-ends, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8869EUE10+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, designs high-performance analog and mixed-signal ICs for power management, sensing, and communication applications across industrial, automotive, and computing markets.

The MAX8869 product line delivers microcap-enabled, high-current LDOs with integrated protection and sequencing features specifically for space-constrained, thermally demanding embedded systems requiring reliable low-noise power delivery.

FAQ

What is the output voltage tolerance of the MAX8869EUE10+T over temperature?

The MAX8869EUE10+T guarantees ±1% output voltage accuracy over the full -40°C to +85°C operating temperature range. This specification is measured at IOUT = 1mA and includes initial tolerance, line regulation, load regulation, and thermal drift-ensuring stable 1.0V core supply for processors and FPGAs without external trimming or calibration circuits.

Does the MAX8869EUE10+T require an external resistor divider to set its output voltage?

No-the MAX8869EUE10+T is factory-preset to +1.0V output and does not require an external resistor divider. The SET pin must be connected directly to GND to activate fixed-mode operation. Using an external divider would place the device in adjustable mode and result in incorrect output voltage unless explicitly designed for VOUT = 1.0V using the VSET = 0.8V reference equation.

How does the RST output of the MAX8869EUE10+T behave during power-up and brownout?

The RST output of the MAX8869EUE10+T is an open-drain signal that remains low until VOUT reaches 92% of 1.0V and stays within regulation for at least 3ms. During brownout, RST asserts low when VOUT drops below 92% and remains low for ≥3ms after recovery-providing clean, debounced reset signaling to microcontrollers without external RC networks.

Can the MAX8869EUE10+T operate with input voltages below 2.7V?

No-the absolute minimum input voltage for normal operation of the MAX8869EUE10+T is +2.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Input undervoltage lockout activates below ~2.45V, disabling regulation. Operation below 2.7V risks functional failure and is outside guaranteed specifications.

What thermal considerations apply to the MAX8869EUE10+T in a 1A load application?

At 1A load with VIN = 3.7V and VOUT = 1.0V, the MAX8869EUE10+T dissipates ~2.7W. Its 16-pin TSSOP-EP package requires soldering the exposed pad (EP) to a ≥1in² ground plane and connecting Pin 10 (GND) to the same plane via multiple vias. Without proper thermal design, junction temperature will exceed +150°C, triggering thermal shutdown.