Analog Devices Inc./Maxim Integrated MAX8860EUA25

Overview

MAX8860EUA25 from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.5V output, delivering up to 300mA from 2.5V–6.5V input. It features 60µV_RMS output noise, 105mV dropout at 200mA, 120µA no-load supply current, and reverse battery protection. It serves as a core power supply for DSP cores and handheld instrumentation requiring stable, low-noise voltage regulation.

For engineers reviewing the MAX8860EUA25 datasheet, MAX8860EUA25 pinout, MAX8860EUA25 application, or MAX8860EUA25 equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world load-transient behavior, and direct alternative options with documented functional differences.

Technical Context

The MAX8860EUA25 uses an internal P-channel MOSFET pass transistor (R_DS(ON) ≈ 0.5Ω) enabling low dropout and eliminating base-drive current loss. Its Dual Mode™ architecture selects between fixed 2.5V output (SET = GND) and adjustable mode (1.25V–6.5V) via external resistor divider on the SET pin.

Regulation relies on a 1.25V bandgap reference and error amplifier comparing feedback to that reference. Fault detection monitors input-to-output differential voltage - FAULT asserts low when V_IN–V_OUT falls below 130mV at 200mA load - and integrates thermal shutdown (170°C trip, 20°C hysteresis) and short-circuit limiting (min 330mA, typ 770mA).

Key Specifications

Pinout & Package

The MAX8860EUA25 is housed in an 8-pin µMAX package (2.1mm × 2.1mm, 1.1mm max height), optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76325DBVR and MCP1702T-2502E/MB, the MAX8860EUA25 delivers 300mA at lower dropout (105mV vs. ≥120mV) with integrated fault signaling and reverse battery protection - making it uniquely suited for robust, high-current portable instrumentation where reliability and battery longevity are primary design constraints.

Availability

MAX8860EUA25 is available at Aetrix Electronics and suitable for wireless handsets, DSP core power supplies, and hand-held instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature ranges.

Supply support for MAX8860EUA25 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 consumer applications.

The MAX8860 series was designed specifically for battery-powered portable electronics requiring ultra-low noise, low dropout, and integrated protection - targeting applications like handheld test gear, medical sensors, and wireless infrastructure edge nodes.

FAQ

What is the guaranteed output voltage tolerance for MAX8860EUA25 over temperature?

The MAX8860EUA25 guarantees a 2.5V output with ±3% tolerance across the full –40°C to +85°C operating range, as specified in the Electrical Characteristics table. At +25°C, typical output is 2.46V–2.54V; at temperature extremes, it remains within 2.43V–2.57V. This ensures reliable operation for precision analog circuits without external trimming.

Does MAX8860EUA25 require an external compensation capacitor?

Yes, the MAX8860EUA25 requires a 33nF capacitor connected between the CC pin and GND for stable operation. This external integrator capacitor minimizes load- and line-regulation errors, lowers output noise, and prevents transient overshoot. Omitting it risks instability, especially under dynamic load conditions or with low-ESR ceramic output capacitors.

Can MAX8860EUA25 be used with input voltages above 5.5V?

Yes, the MAX8860EUA25 supports input voltages up to 6.5V, but when VIN exceeds 5.5V, a minimum load current of 50µA is required in preset (2.5V) mode to maintain regulation. This ensures adequate bias current for internal circuitry. Below 5.5V, no minimum load is needed - simplifying design for ultra-low-power sleep states.

How does the FAULT pin behave during thermal shutdown?

During thermal shutdown, the MAX8860EUA25's FAULT pin asserts low, indicating loss of regulation due to junction temperature exceeding +170°C. The pin remains low until the die cools by ~20°C, at which point regulation resumes and FAULT returns high-impedance. This behavior allows system firmware to detect and log thermal events without additional sensing circuitry.

Is MAX8860EUA25 pin-compatible with other variants in the MAX8860 family?

Yes, all MAX8860 variants including MAX8860EUA25 share identical 8-pin µMAX packaging and pinout. The only difference is the factory-trimmed output voltage (e.g., 1.8V, 2.5V, 2.77V). This allows drop-in replacement across voltage options without PCB layout changes - provided the application's load and thermal requirements remain within the 300mA/330mW limits.