Analog Devices Inc./Maxim Integrated MAX8526EUD+T

Overview

MAX8526EUD+T from Maxim Integrated is a 2A, low-dropout linear regulator with PMOS pass transistor architecture, operating from 1.425V to 3.6V input and delivering adjustable output (0.5V to VIN–0.2V) with ±1.4% accuracy over 0°C to +85°C. It features 200mV dropout at full 2A load, 440µA typical operating supply current, and integrated thermal/short-circuit protection - used in high-density server VRMs and optical module post-regulation.

For engineers reviewing the MAX8526EUD+T datasheet, MAX8526EUD+T pinout, MAX8526EUD+T application, or MAX8526EUD+T equivalent, this page delivers verified electrical specs, TSSOP-14 pin mapping, ceramic-capacitor compatibility, transient response data (45mV deviation for 20mA→2A step), and real-world selection guidance against comparable LDOs.

Technical Context

The MAX8526EUD+T employs an internal p-channel MOSFET pass device with 50mΩ typical on-resistance, eliminating base-drive current and enabling stable operation down to 1.425V input without sacrificing transient performance. Its feedback loop uses a precision 500mV reference (±0.6% initial accuracy) and supports external resistor programming via FB pin.

It integrates soft-start to limit inrush current, logic-controlled shutdown (<50µA quiescent), and robust fault handling: current limiting at 4A (typ), thermal shutdown at +165°C, and automatic recovery at +150°C. Unlike bipolar-based LDOs, its ground current remains stable across load and dropout conditions.

Key Specifications

Pinout & Package

MAX8526EUD+T is housed in a 14-pin TSSOP package (5mm × 6.4mm footprint, 1.1mm profile) with exposed thermal pad (EP) soldered to PCB ground for optimal thermal dissipation (1.7W at +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS74801DRCR and ADM7172ACPZ-R7, MAX8526EUD+T uniquely supports 1.425V minimum input while maintaining 2A output and 200mV dropout - critical for battery-powered or ultra-low-voltage intermediate bus architectures where other alternatives fail to regulate.

Availability

MAX8526EUD+T is available at Aetrix Electronics and suitable for server VRMs, optical transceivers, and industrial ATE requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8526EUD+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) designs high-performance analog and mixed-signal ICs for power, interface, sensing, and timing applications - emphasizing integration, efficiency, and reliability in demanding environments.

The MAX8526EUD+T belongs to Maxim's high-current LDO family targeting low-input-voltage, high-density power delivery in servers, optical modules, and networking infrastructure - engineered for minimal dropout, ceramic-capacitor compatibility, and robust fault tolerance.

FAQ

What is the minimum input voltage required for MAX8526EUD+T to regulate at 2A output?

The MAX8526EUD+T requires a minimum input voltage of 1.425V to maintain regulation at full 2A load. Below this threshold, undervoltage lockout activates (trip point 1.35V ±30mV), disabling output. This enables direct use with single-cell Li-ion batteries or low-voltage intermediate rails where competing LDOs require ≥2.5V input.

Does MAX8526EUD+T support ceramic output capacitors, and what is the minimum value for 2A operation?

Yes, MAX8526EUD+T is fully stable with ceramic output capacitors. For 2A continuous operation, a minimum 10µF ceramic capacitor (low ESR) is required between OUT and GND. Smaller values (e.g., 4.7µF) may be used for loads <1A, calculated as COUT = IOUT(max) × (1µF/200mA), per the datasheet.

How does the thermal protection mechanism work in MAX8526EUD+T?

MAX8526EUD+T shuts down when junction temperature reaches +165°C (thermal shutdown threshold), then automatically resumes regulation once temperature falls to +150°C (hysteresis = 15°C). This cycle repeats until the fault (e.g., excessive ambient temperature or sustained overload) is removed - preventing permanent damage while maintaining system awareness.

Can MAX8526EUD+T be used in adjustable-output configurations, and what is the feedback reference voltage?

Yes, MAX8526EUD+T is designed for adjustable output using external resistors on the FB pin. Its internal reference voltage is 500mV (±0.6% initial accuracy), allowing precise output setting from 0.5V to (VIN – 0.2V) via R1/R2 divider. The datasheet provides the exact equation: VOUT = 0.5V × (1 + R1/R2).

What is the shutdown current consumption of MAX8526EUD+T, and how is shutdown activated?

MAX8526EUD+T draws less than 50µA in shutdown mode, activated by pulling the EN pin below 0.4V (typical falling threshold). An internal 10kΩ pull-down ensures output discharge during shutdown. This ultra-low quiescent state makes it suitable for battery-backed systems where standby power budget is critical.