Analog Devices Inc./Maxim Integrated MAX8888EZK33+T

Overview

MAX8888EZK33+T from Maxim Integrated is a 3.3V fixed-output, 300mA low-dropout linear regulator with open-drain power-OK (POK) flag, 100mV dropout at 200mA, 55µA no-load supply current, and thermal/short-circuit protection - designed for battery-powered portable electronics requiring precise, stable voltage regulation under varying load and input conditions.

For engineers reviewing the MAX8888EZK33+T datasheet, MAX8888EZK33+T pinout, MAX8888EZK33+T application, or MAX8888EZK33+T equivalent, this page delivers verified electrical parameters, SOT23-5 pin mapping, POK timing behavior, dropout vs. load curves, and real-world selection guidance for portable power management in space-constrained designs.

Technical Context

The MAX8888EZK33+T integrates a p-channel MOSFET pass transistor (R_DS(ON) ≈ 0.5Ω), internal 1.25V reference, error amplifier, and POK comparator with 93% V_OUT trip threshold and 1% hysteresis. Its architecture eliminates base-drive current, enabling 55µA quiescent current independent of load.

It operates across 2.5V–5.5V input range with guaranteed 300mA continuous output, foldback current limiting (420mA at V_OUT > 93% nominal), and thermal shutdown at +170°C with +20°C hysteresis - all in a 1mm-height 5-pin SOT23 package optimized for handheld thermal and layout constraints.

Key Specifications

Pinout & Package

MAX8888EZK33+T is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (Z5-1, 1mm height), with pin 1 marked by a dot or beveled edge. The package supports reflow soldering and fits 0805-sized footprints on high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX8888EZK33+T, the XC6206P332MR-G trades POK functionality and lower dropout for ultra-low I_Q, while the ADP121-3.3ARJZ-R7 offers comparable current capability but sacrifices integrated fault signaling and tighter thermal protection - making MAX8888EZK33+T optimal for portable systems requiring coordinated power sequencing and robust fault handling.

Availability

MAX8888EZK33+T is available at Aetrix Electronics and suitable for wireless handsets, notebook computers, digital cameras, and hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8888EZK33+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 MAX8887/MAX8888 family was designed specifically for portable battery-powered equipment - emphasizing ultra-low quiescent current, low dropout, small footprint, and integrated power monitoring to extend runtime and simplify system-level power architecture.

FAQ

What is the maximum continuous output current of the MAX8888EZK33+T?

The MAX8888EZK33+T delivers up to 300mA continuous output current across its full operating temperature range (-40°C to +85°C). It also supports 500mA pulsed loads for short durations, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet. This rating applies specifically to the MAX8888EZK33+T variant with 3.3V output and SOT23-5 package.

Does the MAX8888EZK33+T include thermal shutdown protection?

Yes, the MAX8888EZK33+T incorporates thermal shutdown protection that activates at +170°C junction temperature and includes +20°C hysteresis. When triggered, the pass transistor turns off to prevent damage, and automatically resumes operation once the die cools to +150°C. This behavior is explicitly documented in the Thermal Protection section of the datasheet and applies to all MAX8888 variants including MAX8888EZK33+T.

How does the POK output function on the MAX8888EZK33+T?

The POK output on the MAX8888EZK33+T is an open-drain, active-low signal that asserts low when the regulated output falls below 92.5% of 3.3V (≈3.05V), with 1% typical hysteresis. It remains low during shutdown and floats high-impedance when V_OUT is within regulation. A 100kΩ pullup resistor to OUT is recommended to generate a logic-level signal for microcontroller reset sequencing - a feature unique to the MAX8888 series, not present in MAX8887 variants.

What is the dropout voltage specification for the MAX8888EZK33+T at 200mA load?

The MAX8888EZK33+T exhibits a guaranteed 100mV dropout voltage at 200mA load, as specified in the General Description and Electrical Characteristics sections. This means it maintains 3.3V regulation with as little as 3.4V input, enabling extended battery utilization in single-cell Li-ion and multi-cell alkaline systems. The value is measured at TA = +25°C and holds across the full -40°C to +85°C range per design guarantee.

Can the MAX8888EZK33+T be used with ceramic output capacitors?

Yes, the MAX8888EZK33+T is fully compatible with ceramic output capacitors. The datasheet specifies a minimum 2.2µF X5R/X7R ceramic capacitor with ESR ≤ 0.1Ω placed directly at the OUT pin. Using such capacitors ensures stability, optimal transient response, and low output noise - and is validated in the Applications Information and Typical Operating Characteristics sections for the MAX8888EZK33+T and all members of the MAX8887/MAX8888 family.