Analog Devices Inc./Maxim Integrated MAX8860EUA30

Overview

MAX8860EUA30 from Maxim Integrated is a fixed-output, low-noise, low-dropout linear regulator delivering 3.0V at up to 300mA from a 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 instrumentation, it integrates reverse-battery protection, thermal shutdown, and FAULT output indication.

For engineers reviewing the MAX8860EUA30 datasheet, MAX8860EUA30 pinout, MAX8860EUA30 application, or MAX8860EUA30 equivalent, key selection considerations include its 3.0V ±2.7% output tolerance over –40°C to +85°C, µMAX-8 package footprint, Dual Mode™ configurability (fixed/adjustable), and fault-detection threshold tracking with load current.

Technical Context

The MAX8860EUA30 employs an internal P-channel MOSFET pass transistor (R_DS(ON) ≈ 0.5Ω) enabling low dropout and eliminating base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from either internal resistors (for fixed 3.0V mode) or an external SET-pin divider.

Dual Mode™ operation is controlled by the SET pin voltage: grounding SET selects preset 3.0V regulation; pulling SET above 60mV enables adjustable-mode feedback. The FAULT pin provides open-drain indication of dropout, current limit, or thermal shutdown-its threshold scales with load current (e.g., 130mV at 200mA).

Key Specifications

Pinout & Package

MAX8860EUA30 is housed in an 8-pin µMAX package (3mm × 3mm body, 1.1mm max height), thermally enhanced with exposed paddle (not electrically connected). Pin 1 is marked by a dot; top-view orientation follows standard µMAX numbering.

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 offers superior dropout performance (105mV vs. ≥150mV), integrated FAULT signaling, reverse-battery protection, and Dual Mode™ capability-making it optimal for robust, feature-rich portable systems requiring diagnostics and design reuse.

Availability

MAX8860EUA30 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 –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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer markets.

The MAX8860 series was designed specifically for battery-powered portable electronics needing low-noise, low-dropout regulation with diagnostic features-targeting applications like handheld test equipment, mobile computing peripherals, and wireless infrastructure modules.

FAQ

What is the output voltage tolerance of the MAX8860EUA30 over temperature and load?

The MAX8860EUA30 delivers 3.0V with a tolerance of ±2.7% across the full operating temperature range (–40°C to +85°C) and load current (0–300mA). At +25°C, the typical output is 3.00V with min/max of 2.92V/3.08V; this expands slightly at temperature extremes but remains within the specified band. This precision supports tight-tolerance DSP and RF circuitry without external trimming.

Does the MAX8860EUA30 require an external compensation capacitor, and why?

Yes, the MAX8860EUA30 requires a 33nF capacitor connected between the CC pin and GND. This external integrator capacitor stabilizes the control loop, minimizes load- and line-regulation errors, lowers output noise, and limits transient overshoot during recovery from dropout or overload. Omitting it risks instability, especially with low-ESR ceramic output capacitors.

How does the FAULT pin on the MAX8860EUA30 behave during different fault conditions?

The FAULT pin on the MAX8860EUA30 is an open-drain N-channel MOSFET that pulls low during dropout, current limiting, thermal shutdown, or when the input-output differential falls below the load-dependent threshold (e.g., 130mV at 200mA). In normal regulation and shutdown modes, FAULT is high-impedance. A pull-up resistor (e.g., 100kΩ to OUT) is required to generate a logic-high signal when healthy.

Can the MAX8860EUA30 be used with input voltages above 5.5V, and what precautions apply?

Yes, the MAX8860EUA30 supports inputs up to 6.5V, but when VIN exceeds 5.5V in fixed-output mode, a minimum load current of 50µA is required to maintain regulation. This prevents instability due to internal bias limitations. For adjustable-mode operation, ensure total current through the SET-divider and load is ≥60µA. Below 5.5V, no minimum load is needed.

What thermal protection features does the MAX8860EUA30 provide, and how do they operate?

The MAX8860EUA30 includes thermal shutdown that activates at +170°C junction temperature and resumes operation after cooling by ~20°C (hysteresis). During continuous overload, this causes pulsed output rather than latch-up. To avoid momentary output overshoot (>2%) when load is removed at high temperature, a minimum load resistor may be added to maintain ≥100µA current above +125°C ambient.