Analog Devices Inc./Maxim Integrated MAX8860EUA28+T

Overview

The MAX8860EUA28+T from Maxim Integrated is a low-noise, low-dropout linear regulator delivering 300mA at a fixed 2.82V output, operating from 2.5V to 6.5V input, with 60µVRMS output noise, 105mV dropout at 200mA, and 120µA no-load supply current-used in DSP core power and handheld instrumentation where stable, low-noise bias is critical.

For engineers reviewing the MAX8860EUA28+T datasheet, MAX8860EUA28+T pinout, MAX8860EUA28+T application, or MAX8860EUA28+T equivalent, this page provides verified technical context, validated pin functions, confirmed dual-mode operation (fixed 2.82V or adjustable 1.25V–6.5V), fault-detection behavior, and real-world thermal and load-transient performance data.

Technical Context

The MAX8860EUA28+T integrates an internal P-channel MOSFET pass transistor (R_DS(ON) ≈ 0.5Ω) enabling ultra-low quiescent current across load conditions and eliminating base-drive losses typical of PNP-based LDOs. Its Dual Mode™ architecture uses a 60mV threshold on the SET pin to auto-select between internal resistor-divider regulation (for fixed 2.82V output) and external feedback configuration.

Regulation relies on a 1.25V bandgap reference, error amplifier, and integrator circuit driven by a 33nF compensation capacitor (CC pin), ensuring stability with only 2.2µF output capacitance. Fault detection monitors both regulation loss (dropout, current limit, thermal shutdown) and insufficient input-output differential (≥130mV at 200mA), pulling the open-drain FAULT pin low.

Key Specifications

Pinout & Package

The MAX8860EUA28+T is housed in an 8-pin µMAX package (3mm × 3mm, 1.1mm max height), thermally enhanced with exposed pad (not electrically connected), compatible with standard 0.025" pitch PCB assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, fixed-output LDO applications.

Compared with TPS76328DBVR and MCP1702T-2802E/MB, the MAX8860EUA28+T uniquely combines 2.82V precision, 105mV ultra-low dropout, integrated FAULT reporting, and reverse-battery protection in a space-efficient µMAX package-making it optimal for high-reliability, battery-limited portable systems demanding both performance and fault resilience.

Availability

MAX8860EUA28+T is available at Aetrix Electronics and suitable for wireless handsets, DSP core power, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX8860EUA28+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.

The MAX8860 series was developed specifically for battery-powered portable electronics requiring ultra-low noise, low dropout, and intelligent fault monitoring-targeting DSP, RF, and handheld instrumentation markets.

FAQ

What output voltage does the MAX8860EUA28+T deliver, and is it adjustable?

The MAX8860EUA28+T delivers a factory-trimmed fixed output voltage of 2.82V (±3% over –40°C to +85°C). It supports Dual Mode™ operation: grounding the SET pin selects the fixed 2.82V output, while applying >60mV to SET enables adjustable mode (1.25V–6.5V) using external resistors. The MAX8860EUA28+T datasheet confirms this behavior is guaranteed for the EUA28 variant.

What is the minimum input voltage required for regulation with the MAX8860EUA28+T?

The MAX8860EUA28+T requires a minimum input voltage of V_OUT + dropout voltage. At 200mA load, dropout is 105mV, so minimum input is 2.82V + 0.105V = 2.925V. The absolute minimum input rating is 2.5V, but regulation is only guaranteed above the dropout threshold. The MAX8860EUA28+T electrical characteristics table specifies this relationship across temperature and load.

How does the FAULT pin on the MAX8860EUA28+T behave during dropout or overload?

The FAULT pin on the MAX8860EUA28+T is an open-drain output that pulls low during dropout, current-limit activation, thermal shutdown, or when the input-output differential falls below 130mV (at 200mA). It remains high-impedance in shutdown mode. A pull-up resistor (e.g., 100kΩ to OUT) is required to generate a logic-high signal. This behavior is explicitly defined in the MAX8860EUA28+T pin description and fault-detection section.

Can the MAX8860EUA28+T be used with ceramic output capacitors, and what value is recommended?

Yes, the MAX8860EUA28+T is fully stable with ceramic output capacitors. The recommended minimum value is 2.2µF with ESR <0.5Ω (e.g., X7R 1206). Larger values (e.g., 10µF) improve transient response for fast load steps. The MAX8860EUA28+T typical operating circuit and capacitor selection section confirm 2.2µF ceramic as sufficient for full 300mA load stability across temperature.

Does the MAX8860EUA28+T include reverse battery protection, and how does it work?

Yes, the MAX8860EUA28+T includes integrated reverse battery protection that limits reverse current to <1mA if VIN or SHDN falls below GND. Internal circuitry disconnects parasitic paths and isolates the die, preventing overheating and damage from incorrectly installed batteries. This feature is documented in the MAX8860EUA28+T reverse battery protection section and absolute maximum ratings.