Analog Devices Inc./Maxim Integrated MAX8559ETAGG+T

Overview

MAX8559ETAGG+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel from 2.5V–6.5V input, with factory-preset 3.0V/3.0V outputs, 60mV dropout at 100mA, and 32µVRMS output noise - used in battery-powered portable electronics requiring clean, independent dual-rail power.

For engineers reviewing the MAX8559ETAGG+T datasheet, MAX8559ETAGG+T pinout, MAX8559ETAGG+T application, or MAX8559ETAGG+T equivalent, key selection criteria include dual independent shutdown control, ultra-low quiescent current (115µA per LDO), TDFN-EP package thermal performance, and compatibility with small ceramic capacitors without mandatory bypass.

Technical Context

The MAX8559ETAGG+T integrates two independent P-channel MOSFET pass transistors (0.6Ω R_DS(ON)) with internal 1.25V bandgap reference and error amplifiers, enabling load-proportional dropout and eliminating base-drive current loss typical of PNP-based regulators. Each LDO features autodischarge circuitry and independent feedback via internal resistor dividers.

It implements dual logic-controlled shutdown (SHDNA/SHDNB) that fully disables both regulators and the internal reference when both inputs are low, reducing supply current to 0.01µA; during shutdown, each output is actively discharged through a 385Ω internal resistor to GND.

Key Specifications

Pinout & Package

MAX8559ETAGG+T is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.8mm height) with exposed paddle for thermal dissipation. The exposed pad must be soldered to PCB ground plane to achieve rated 1.95W power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A2023PDQNR and ADP151ACBZ-3.0-R7, the MAX8559ETAGG+T uniquely delivers dual 300mA 3.0V outputs with independent shutdown and integrated thermal protection in a thermally enhanced TDFN-EP - making it the only solution for compact, battery-efficient dual-rail systems requiring coordinated power management.

Availability

MAX8559ETAGG+T is available at Aetrix Electronics and suitable for cellular phones, digital cameras, notebook computers, and wireless LAN cards requiring stable component supply with guaranteed long-term manufacturability and lead-free compliance.

Supply support for MAX8559ETAGG+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 MAX8559 belongs to Maxim's precision low-noise LDO family, designed specifically for space-constrained, battery-operated portable electronics demanding dual independent regulated rails with minimal quiescent power and high PSRR.

FAQ

What output voltages does the MAX8559ETAGG+T provide?

The MAX8559ETAGG+T is factory-configured with fixed 3.0V on both OUTA and OUTB outputs - no external resistors or programming required. This dual 3.0V configuration is confirmed by the "GG" suffix in the part number and the top-mark "AIE" per the Output Voltage Selector Guide. The device does not support adjustable output or field reconfiguration.

Does the MAX8559ETAGG+T require the BP capacitor for stable operation?

No, the MAX8559ETAGG+T operates stably without the 0.01µF BP capacitor - its omission reduces total solution size and cost. However, installing the BP capacitor lowers output noise from 32µVRMS to under 25µVRMS. Stability is maintained across temperature and load with or without BP, as verified in the Capacitor Selection section and Typical Operating Characteristics.

What is the maximum continuous power dissipation for the MAX8559ETAGG+T?

The MAX8559ETAGG+T in its 8-pin TDFN-EP package supports 1.95W continuous power dissipation at +70°C ambient, derating at 24.4mW/°C above that temperature. This rating assumes proper soldering of the exposed paddle to the PCB ground plane. Exceeding this limit triggers thermal shutdown at +160°C junction temperature.

Can the MAX8559ETAGG+T operate from a single-cell Li-ion battery?

Yes, the MAX8559ETAGG+T operates across 2.5V–6.5V input, covering the full discharge curve of a single-cell Li-ion battery (typically 3.0V–4.2V). With 60mV dropout at 100mA, it maintains regulation down to 3.06V input for the 3.0V outputs - enabling >95% of battery capacity utilization before brownout.

How does shutdown behavior differ between single and dual shutdown activation on the MAX8559ETAGG+T?

When only SHDNA is pulled low, OUTA shuts down while OUTB remains active and the internal reference stays enabled. When both SHDNA and SHDNB are low, both LDOs and the internal reference turn off, reducing total supply current to 0.01µA. Each active output is discharged to GND via a 385Ω internal resistor during its respective shutdown - preventing floating nodes and ensuring predictable power sequencing.