Analog Devices Inc./Maxim Integrated MAX8860EUA30+

Overview

MAX8860EUA30+ from Maxim Integrated is a low-noise, low-dropout linear regulator delivering 300mA at a fixed 3.0V output, operating from 2.5V to 6.5V input. It features 60µVRMS output noise, 105mV dropout at 200mA, 120µA no-load supply current, and reverse battery protection-designed for DSP core power in space-constrained portable electronics.

For engineers reviewing the MAX8860EUA30+ datasheet, MAX8860EUA30+ pinout, MAX8860EUA30+ application, or MAX8860EUA30+ equivalent, this page provides verified functional specifications, validated µMAX package mapping, confirmed Dual Mode™ configuration capability (fixed 3.0V or adjustable 1.25V–6.5V), FAULT indicator behavior, and real-world thermal shutdown thresholds.

Technical Context

The MAX8860EUA30+ 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 regulators. Its Dual Mode™ comparator selects feedback path based on SET pin voltage (<60mV for fixed mode), ensuring precise 3.0V regulation without external resistors when SET = GND.

Regulation stability relies on a 33nF CC capacitor for integrator-based compensation, while fault detection monitors both output regulation loss and insufficient VIN–VOUT differential (e.g., <130mV at 200mA). Thermal shutdown activates at +170°C with 20°C hysteresis, and reverse battery protection limits reverse current to <1mA when VIN or SHDN falls below GND.

Key Specifications

Pinout & Package

The MAX8860EUA30+ is housed in an 8-pin µMAX package (3.0mm × 3.0mm × 1.1mm max height), optimized for high-density portable PCB layouts with exposed pad thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76330DBVR and MCP1700T-3002E/MB, the MAX8860EUA30+ uniquely combines 300mA output, 105mV dropout, integrated FAULT reporting, and reverse battery protection in a space-saving µMAX package-making it the only option that meets full specification requirements for next-generation handheld instrumentation.

Availability

MAX8860EUA30+ is available at Aetrix Electronics and suitable for wireless handsets, DSP core power supplies, and PCMCIA card designs requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance over –40°C to +85°C.

Supply support for MAX8860EUA30+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

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

FAQ

What is the guaranteed output voltage tolerance for MAX8860EUA30+ over temperature?

The MAX8860EUA30+ guarantees a 3.0V output within ±2.7% (2.92V to 3.08V) across the full –40°C to +85°C operating range, as specified in the Electrical Characteristics table. This tolerance includes initial accuracy, line regulation, load regulation, and thermal drift-ensuring reliable 3.0V rail generation for logic and analog circuitry without external trimming. The MAX8860EUA30+ achieves this via laser-trimmed internal feedback resistors and a stable 1.25V bandgap reference.

Can MAX8860EUA30+ be used in adjustable mode, and what is required?

Yes, the MAX8860EUA30+ supports adjustable mode by disconnecting the SET pin from GND and connecting it to an external resistor divider. To set an output between 1.25V and 6.5V, use R1 and R2 such that V_OUT = 1.25V × (1 + R1/R2), with R2 = 100kΩ recommended for optimal accuracy and PSRR. The MAX8860EUA30+'s Dual Mode™ comparator automatically switches to adjustable operation when V_SET exceeds 60mV, enabling flexible voltage scaling without hardware changes.

How does the FAULT pin behave during thermal shutdown?

During thermal shutdown, the MAX8860EUA30+ asserts the FAULT pin low to indicate loss of regulation-consistent with its behavior during dropout or current limiting. The FAULT output remains low while the junction temperature exceeds +170°C and transitions high-impedance only after thermal recovery and re-enabling of regulation. This allows host systems to distinguish thermal faults from other failure modes using the same interrupt pin, simplifying firmware fault-handling logic for the MAX8860EUA30+.

What is the minimum output capacitor required for stable operation of MAX8860EUA30+?

The MAX8860EUA30+ requires a minimum 2.2µF ceramic output capacitor with ESR <0.5Ω for stable operation across –40°C to +85°C and up to 300mA load. This value is validated in the Typical Operating Characteristics and Applications Information sections. Using smaller capacitors risks oscillation or poor transient response; larger values (e.g., 10µF) improve noise rejection for high-speed load steps but are not mandatory for basic functionality of the MAX8860EUA30+.

Does MAX8860EUA30+ include reverse battery protection, and how does it work?

Yes, the MAX8860EUA30+ incorporates active reverse battery protection that limits reverse current to <1mA when VIN or SHDN falls below GND. Internal circuitry detects reversed polarity and disconnects parasitic paths-including the P-channel pass transistor body diode-preventing destructive current flow and overheating. This feature eliminates the need for external Schottky diodes in handheld instrument designs, directly enhancing reliability of the MAX8860EUA30+ in field-deployed battery-powered equipment.