Analog Devices Inc./Maxim Integrated MAX8860EUA33+T

Overview

MAX8860EUA33+T from Maxim Integrated is a low-noise, low-dropout linear regulator delivering 300mA at a fixed 3.3V 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 space-constrained, battery-powered systems such as wireless handsets and palmtop computers.

For engineers reviewing the MAX8860EUA33+T datasheet, MAX8860EUA33+T pinout, MAX8860EUA33+T application, or MAX8860EUA33+T equivalent, key selection criteria include guaranteed 3.3V ±1.5% output accuracy over –40°C to +85°C, Dual Mode™ configurability (fixed or adjustable), FAULT indicator functionality, and µMAX package compatibility with 2.2µF ceramic output capacitance.

Technical Context

The MAX8860EUA33+T integrates 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 3.3V mode) or external SET-pin dividers (for adjustable mode).

Dual Mode™ operation is controlled by the SET pin voltage threshold (≤60mV for fixed mode); FAULT detection monitors both 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 MAX8860EUA33+T is housed in an 8-pin µMAX package (3.0mm × 3.0mm × 1.1mm max height), thermally enhanced with exposed paddle (internally connected to GND), requiring standard lead-free reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76333DBVR and MCP1700T-3302E/TT, the MAX8860EUA33+T uniquely combines 300mA capability, 60µVRMS noise, FAULT signaling, reverse battery protection, and Dual Mode™ flexibility in a thermally optimized µMAX package - making it the only option meeting full specification requirements for handheld instrumentation and wireless infrastructure modules.

Availability

MAX8860EUA33+T is available at Aetrix Electronics and suitable for wireless handset power, DSP core supply, and PCMCIA card regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for MAX8860EUA33+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) 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 developed specifically for battery-powered portable electronics demanding ultra-low noise, low dropout, and integrated fault monitoring - targeting design-in across handheld computing, wireless infrastructure, and precision instrumentation.

FAQ

What is the output voltage tolerance of the MAX8860EUA33+T over temperature?

The MAX8860EUA33+T delivers 3.3V with ±1.5% tolerance across the full operating range of –40°C to +85°C, as confirmed in the Electrical Characteristics table. This tight regulation ensures reliable operation of 3.3V logic interfaces and analog subsystems without additional post-regulation filtering. The MAX8860EUA33+T achieves this via laser-trimmed internal feedback resistors and a stable 1.25V bandgap reference.

Does the MAX8860EUA33+T require an external compensation capacitor?

Yes, the MAX8860EUA33+T requires a 33nF capacitor connected between the CC pin and GND for loop stability, noise reduction, and transient response optimization. This integrator capacitor actively corrects load- and line-regulation errors and limits overshoot during exit from dropout or thermal shutdown. Omitting it risks oscillation or degraded PSRR performance. The MAX8860EUA33+T does not function reliably without this component.

Can the MAX8860EUA33+T be used in adjustable-output mode?

Yes, the MAX8860EUA33+T supports adjustable-output mode via its Dual Mode™ architecture: connect the SET pin to a resistor divider (not GND) to set outputs from 1.25V to 6.5V using V_OUT = 1.25V × (1 + R1/R2). However, doing so disables the factory-trimmed 3.3V output. The MAX8860EUA33+T's SET pin threshold (≤60mV) must be maintained below 100kΩ impedance to avoid spurious mode switching.

What protection features does the MAX8860EUA33+T include?

The MAX8860EUA33+T integrates short-circuit protection (330mA min current limit), thermal shutdown (+170°C trip with 20°C hysteresis), reverse battery protection (<1mA reverse current), and FAULT output signaling for regulation loss. These operate independently: FAULT asserts during dropout, current limit, or thermal events, while shutdown logic disables all circuitry in 10nA mode. No external components are needed to activate these protections. The MAX8860EUA33+T relies on them for robust field operation.

Is the µMAX package of the MAX8860EUA33+T RoHS-compliant and lead-free?

Yes, the MAX8860EUA33+T µMAX package is RoHS-compliant and lead-free, conforming to JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and qualified for standard lead-free reflow profiles (peak 260°C). The exposed thermal paddle is internally connected to GND, enhancing thermal performance without requiring solder paste voiding control. Aetrix Electronics guarantees full compliance documentation and traceability for the MAX8860EUA33+T.