Analog Devices Inc./Maxim Integrated MAX8880EUT-T

Overview

The MAX8880EUT-T 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 detection - deployed in smoke detectors, smart battery packs, and real-time clocks where standby current and reliability are critical.

For engineers reviewing the MAX8880EUT-T datasheet, MAX8880EUT-T pinout, MAX8880EUT-T application, or MAX8880EUT-T equivalent, this page delivers verified technical context, exact pin functions, design-meaningful specifications, validated alternatives, and supply-chain support tailored to battery-powered embedded systems requiring sub-5µA IQ and stable 200mA regulation across -40°C to +85°C.

Technical Context

The MAX8880EUT-T implements a PMOS-based LDO architecture with a precision 1.257V internal reference and error amplifier driving a 2Ω P-channel pass transistor - enabling ultra-low dropout (100mV at 50mA) and consistent 3.5µA supply current across full input range (2.5V–12V) and temperature (-40°C to +85°C). Its feedback (FB) pin accepts external resistor dividers to set output voltage, while POK provides open-drain fault signaling when VOUT drops >10% below nominal.

Reverse battery protection limits IN-to-GND reverse leakage to <1mA at -12V, independent of SHDN state; thermal shutdown activates at +160°C with 15°C hysteresis; and foldback current limiting sustains safe operation during output shorts without damage. The device requires only 1µF input and 4.7µF output capacitors (ESR ≤0.5Ω) for stability up to 200mA load.

Key Specifications

Pinout & Package

MAX8880EUT-T uses the 6-pin SOT23-6 package (JEDEC MO-178AA, 2.9mm × 2.8mm × 1.3mm), with exposed pad not present (SOT23 variant). Pin 1 is IN; pin 2 is GND; pin 3 is OUT; pin 4 is FB; pin 5 is SHDN; pin 6 is POK. All pins are surface-mount, lead-free, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS78033DRVR and MCP1703T-3302E/MB, the MAX8880EUT-T uniquely combines adjustable output, 3.5µA IQ, integrated POK, and true reverse-battery protection in a 6-pin SOT23 - making it the only option for compact, self-contained, long-life battery systems needing configurable regulation and autonomous fault reporting.

Availability

MAX8880EUT-T is available at Aetrix Electronics and suitable for smoke detectors, smart battery packs, and real-time clocks requiring stable component supply, long-lifecycle assurance, and guaranteed traceable sourcing for industrial and safety-critical deployments.

Supply support for MAX8880EUT-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, automotive, and computing applications.

The MAX8880EUT-T belongs to Maxim's ultra-low-IQ LDO family designed specifically for multi-year battery operation in safety-critical and portable electronics - prioritizing quiescent current minimization, reverse-polarity resilience, and integrated fault monitoring over raw current capability.

FAQ

What is the minimum input voltage required for the MAX8880EUT-T to regulate at 3.3V output?

The MAX8880EUT-T requires a minimum input voltage of 3.4V to maintain 3.3V output under 50mA load, based on its typical 100mV dropout voltage. At higher loads, dropout increases linearly with current (2Ω × IOUT); for 200mA, VIN must be ≥3.7V. Input undervoltage lockout (UVLO) asserts below 2.1V, but regulation ceases well before that point due to dropout limitations.

Can the MAX8880EUT-T be used with ceramic output capacitors, and what ESR range is acceptable?

Yes, the MAX8880EUT-T is stable with ceramic output capacitors. It supports ESR values from 0.01Ω to 0.5Ω for 4.7µF capacitors at 200mA load, and up to 1Ω for 1µF capacitors at ≤40mA. X7R or X5R dielectrics are recommended for stable capacitance and ESR across -40°C to +85°C; avoid Z5U/Y5V types due to large temperature-dependent ESR shifts that may compromise stability.

How does the POK output of the MAX8880EUT-T behave during shutdown versus output undervoltage?

The POK output of the MAX8880EUT-T is low in both shutdown (SHDN < 0.5V) and output undervoltage (VOUT < 90% of nominal). It is high-impedance only during normal regulation. No internal distinction is made between the two fault conditions - external logic must correlate POK state with SHDN level to determine root cause. A pull-up resistor (e.g., 100kΩ to VOUT) is required for proper logic-level interpretation.

What is the maximum allowable power dissipation for the MAX8880EUT-T in the SOT23-6 package at +70°C ambient?

In the 6-pin SOT23-6 package, the MAX8880EUT-T has a continuous power dissipation limit of 696mW at TA = +70°C, derating by 8.7mW/°C above that temperature. At +85°C ambient, maximum dissipation drops to 565.5mW. For a 5V input regulating 3.3V at 200mA, power dissipation is 340mW - well within limits. Thermal shutdown activates at +160°C junction temperature, providing safety margin.

Does the MAX8880EUT-T require an external resistor network on the FB pin for basic operation?

Yes, the MAX8880EUT-T requires an external resistor divider connected between OUT, FB, and GND to set the output voltage - unlike the MAX8881 which has internal resistors. The standard configuration uses R3 (top) and R4 (bottom), with VOUT = 1.257V × (1 + R3/R4). R4 is typically 1.2MΩ to optimize IQ, accuracy, and PSRR; total divider current must exceed 1µA for stable regulation.