Analog Devices Inc./Maxim Integrated MAX8860EUA28

Overview

MAX8860EUA28 from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.82V output, delivering up to 300mA from 2.5V–6.5V input. It features 60µVRMS output noise, 105mV dropout at 200mA, and 120µA no-load supply current. Designed for battery-powered DSP core power and handheld instruments, it integrates reverse-battery protection and fault detection.

For engineers reviewing the MAX8860EUA28 datasheet, MAX8860EUA28 pinout, MAX8860EUA28 application, or MAX8860EUA28 equivalent, key selection criteria include its precise 2.82V output tolerance (±0.05V over –40°C to +85°C), µMAX-8 package footprint, Dual Mode™ configurability, and FAULT open-drain indicator for regulation loss.

Technical Context

The MAX8860EUA28 uses an internal P-channel MOSFET pass transistor (R_DS(ON) ≈ 0.5Ω) to achieve low dropout and eliminate base-drive current losses. Its Dual Mode™ architecture selects between fixed-output (via SET = GND) and adjustable-output (via external resistor divider) based on V_SET threshold (60mV).

Regulation relies on a 1.25V bandgap reference, error amplifier, and integrator circuitry stabilized by a 33nF CC capacitor. Fault detection monitors both output regulation status and input-to-output differential voltage (130mV threshold at 200mA), driving the open-drain FAULT pin low during dropout, thermal shutdown, or current limit.

Key Specifications

Pinout & Package

Package: 8-pin µMAX (3mm × 3mm, 1.1mm max height), surface-mount, lead-free compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76328DBVR and MCP1702T-2802E/MB, the MAX8860EUA28 uniquely combines 300mA drive, 2.82V precision, integrated FAULT reporting, and reverse-battery protection in a space-constrained µMAX package-making it optimal for high-reliability portable instrumentation.

Availability

MAX8860EUA28 is available at Aetrix Electronics and suitable for wireless handsets, DSP core power, and hand-held instruments requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX8860EUA28 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 demanding applications.

The MAX8860 product line was designed specifically for battery-powered portable electronics requiring ultra-low noise, low dropout, and robust fault protection-targeting wireless infrastructure, medical handhelds, and industrial data acquisition systems.

FAQ

What is the guaranteed output voltage tolerance for MAX8860EUA28 over temperature?

The MAX8860EUA28 guarantees a 2.82V output with ±0.05V tolerance over the full –40°C to +85°C operating range, as confirmed in the Electrical Characteristics table. This corresponds to ±1.77% accuracy and ensures reliable operation for precision analog circuits in palmtop computers and electronic planners where voltage drift directly impacts measurement fidelity.

Does MAX8860EUA28 require an external compensation capacitor?

Yes, the MAX8860EUA28 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 oscillation-especially critical when using low-ESR ceramic output capacitors in handheld instrument designs.

How does the FAULT pin function on MAX8860EUA28?

The FAULT pin on MAX8860EUA28 is an open-drain N-channel MOSFET that pulls low during dropout, thermal shutdown, current limit, or when the input-to-output differential falls below 130mV at 200mA load. It remains high-impedance in shutdown mode and must be pulled up to OUT (typically with a 100kΩ resistor) to generate a valid logic-level signal for MCU monitoring.

Can MAX8860EUA28 be used in adjustable-output mode?

Yes, the MAX8860EUA28 supports adjustable-output mode via the SET pin. By disconnecting SET from GND and connecting an external resistor divider (e.g., R1 = 100kΩ, R2 = 100kΩ), the output can be set from 1.25V to 6.5V using the formula V_OUT = 1.25V × (1 + R1/R2). However, the 2.82V fixed output is only guaranteed when SET is solidly tied to GND with impedance <100kΩ.

What thermal protection features does MAX8860EUA28 include?

The MAX8860EUA28 includes thermal shutdown at +170°C with 20°C hysteresis, ensuring the device cycles off during sustained overload and resumes operation only after cooling to ~150°C. This prevents permanent damage in enclosed applications like hand-held instruments and avoids latch-up conditions common in poorly ventilated PCMCIA card slots.