Analog Devices Inc./Maxim Integrated MAX8880EUT+

Overview

The MAX8880EUT+ from Maxim Integrated is an ultra-low-quiescent-current (3.5µA), adjustable-output (1.25V–5.5V), 200mA low-dropout linear regulator in a 6-pin SOT23 package, featuring reverse battery protection, thermal shutdown, short-circuit protection, and open-drain POK output for out-of-regulation monitoring-designed for smoke detectors, smart battery packs, and real-time clocks.

For engineers reviewing the MAX8880EUT+ datasheet, MAX8880EUT+ pinout, MAX8880EUT+ application, or MAX8880EUT+ equivalent, key selection criteria include its 2Ω PMOS pass device enabling ultra-low IQ across dropout, ±1.5% output voltage accuracy over temperature, 2.5V–12V input range, and compatibility with 1µF input / 4.7µF output ceramic capacitors for stable operation up to 200mA load.

Technical Context

The MAX8880EUT+ implements a P-channel MOSFET pass transistor architecture with a 1.25V internal reference and error amplifier, enabling precise feedback control via external resistor divider on the FB pin. Its shutdown logic disables regulation when SHDN < 0.5V, while reverse battery protection limits IN-to-GND reverse current to <1mA.

POK functionality uses an internal comparator referenced to 90% of nominal VOUT (1.5% hysteresis) to assert low during dropout or shutdown; the open-drain output requires an external pull-up. Thermal shutdown activates at +160°C (15°C hysteresis), cycling the output under sustained overload.

Key Specifications

Pinout & Package

Package: 6-pin SOT23-6 (JEDEC MO-178AA), 2.9mm × 2.8mm × 1.3mm body, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS78225DRVR and MCP1702T-3302E/MB, the MAX8880EUT+ uniquely combines adjustable output, integrated POK, reverse-battery protection, and 200mA capability in SOT23-making it optimal for safety-critical, battery-backed systems requiring design-in flexibility and fault resilience.

Availability

MAX8880EUT+ is available at Aetrix Electronics and suitable for smoke detectors, smart battery packs, real-time clocks, and other applications requiring stable component supply with long-term lifecycle support and guaranteed traceability.

Supply support for MAX8880EUT+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.

The MAX8880EUT+ belongs to Maxim's ultra-low-IQ LDO family, engineered specifically for battery-powered systems where extended shelf life, reverse-polarity resilience, and regulated power-good signaling are essential.

FAQ

What is the maximum input voltage rating for the MAX8880EUT+?

The MAX8880EUT+ has an absolute maximum input voltage rating of +14V relative to GND. Its operational input voltage range is specified from 2.5V to 12V. Exceeding 12V during normal operation may degrade long-term reliability, and voltages above +14V risk permanent damage per Absolute Maximum Ratings. The device also withstands –14V on IN with reverse-battery protection limiting current to <1mA.

How do I configure the output voltage of the MAX8880EUT+?

The MAX8880EUT+ output voltage is set using an external resistor divider connected between OUT, FB, and GND. With VFB = 1.257V ±1.5%, the formula is VOUT = 1.257V × (1 + R3/R4). For best accuracy and low IQ, select R4 = 1.2MΩ and ensure total divider current exceeds 1µA. Do not connect FB directly to OUT-that configuration is reserved for the MAX8881 fixed-output variant.

Does the MAX8880EUT+ require an output capacitor, and what type is recommended?

Yes, the MAX8880EUT+ requires an output capacitor for stability. A 4.7µF X7R or X5R ceramic capacitor with ESR < 0.5Ω is recommended for loads up to 200mA. For loads ≤40mA, a 1µF ceramic capacitor is acceptable. Avoid Z5U/Y5V dielectrics due to large capacitance and ESR drift over temperature, which can compromise stability-especially at low temperatures.

What does the POK pin on the MAX8880EUT+ indicate, and how should it be used?

The POK pin on the MAX8880EUT+ is an open-drain output that goes low when VOUT falls below 90% of its nominal value (with 1.5% hysteresis) or during shutdown. It must be pulled up externally (e.g., to VOUT or another rail) to generate a logic-high signal during regulation. Adding a capacitor in parallel with the pull-up resistor creates a delayed reset pulse, useful for system initialization timing control.

Is the MAX8880EUT+ pin-compatible with the MAX8881 series?

No, the MAX8880EUT+ is not pin-compatible with MAX8881 variants despite sharing the same 6-pin SOT23 package and pinout numbering. While both use identical physical pin assignments (IN, GND, OUT, FB, SHDN, POK), the MAX8881 internally connects FB to OUT and lacks external feedback capability-so connecting an external divider to FB on a MAX8881 will disrupt regulation. The MAX8880EUT+ requires the FB pin to be actively driven by the divider.