Analog Devices Inc./Maxim Integrated MAX8559EBAGJ+T

Overview

MAX8559EBAGJ+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with 32µV_RMS output noise, 60mV dropout at 100mA, and independent logic-controlled shutdown inputs. It operates from 2.5V to 6.5V input and provides factory-preset 3.0V/2.85V outputs in an 8-bump UCSP (2mm × 1mm) package for space-constrained portable power rails.

For engineers reviewing the MAX8559EBAGJ+T datasheet, MAX8559EBAGJ+T pinout, MAX8559EBAGJ+T application, or MAX8559EBAGJ+T equivalent, key selection criteria include dual-output noise performance, thermal protection behavior, shutdown current consumption, and compatibility with ceramic output capacitors without mandatory bypass.

Technical Context

The MAX8559EBAGJ+T integrates two independent P-channel MOSFET pass transistors (R_DS(ON) ≈ 0.6Ω), each with dedicated error amplifiers, internal 1.25V bandgap reference, and autodischarge circuitry. Its feedback loop uses internal resistor dividers to set fixed 3.0V and 2.85V outputs without external resistors.

Each LDO features independent SHDNA/SHDNB control enabling selective shutdown, 385Ω internal discharge path during shutdown, and thermal shutdown at +160°C with 10°C hysteresis. The BP pin accepts a 0.01µF capacitor to reduce noise via an integrated RC filter.

Key Specifications

Pinout & Package

MAX8559EBAGJ+T is packaged in an 8-bump UCSP (2.06mm × 1.03mm, 0.4mm pitch) with exposed die pad not connected in this variant. Pin assignment follows standard UCSP top-view layout with A1–A4 and B1–B4 bump positions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A2028PDBVR and ADP125ARHZ-3.0-R7, the MAX8559EBAGJ+T uniquely delivers matched dual outputs with independent control, sub-35µV_RMS noise, and integrated thermal protection - making it the only solution that satisfies co-located 3.0V/2.85V low-noise rail requirements in a single 2mm² package.

Availability

MAX8559EBAGJ+T is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, notebook subsystems, and wireless LAN cards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX8559EBAGJ+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.

The MAX8559 belongs to Maxim's low-noise LDO family engineered specifically for battery-powered handheld devices requiring dual, independently controlled, ultra-low-quiescent-power voltage rails with minimal PCB footprint.

FAQ

What output voltages does the MAX8559EBAGJ+T provide?

The MAX8559EBAGJ+T provides factory-preset output voltages of 3.0V on OUTA and 2.85V on OUTB. These values are laser-trimmed during production and require no external feedback components. The 'GJ' suffix in the part number directly corresponds to this specific dual-voltage configuration as defined in Maxim's Output Voltage Selector Guide.

Does the MAX8559EBAGJ+T require an external bypass capacitor on the BP pin?

Yes, the MAX8559EBAGJ+T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 32µV_RMS output noise. Omitting this capacitor increases output noise to 254µV_RMS. The BP pin connects to an internal RC filter that attenuates reference voltage ripple, and the capacitor value is optimized for noise reduction without compromising startup time.

What is the maximum continuous output current per channel for the MAX8559EBAGJ+T?

The MAX8559EBAGJ+T delivers up to 300mA of continuous output current per channel (OUTA and OUTB). This rating assumes use of a 4.7µF ceramic output capacitor and operation within the -40°C to +85°C temperature range. The device includes internal current limiting (310mA minimum) and thermal shutdown to protect against overload conditions.

How does the shutdown functionality work on the MAX8559EBAGJ+T?

The MAX8559EBAGJ+T features two independent shutdown inputs: SHDNA controls OUTA and SHDNB controls OUTB. Driving either input low disables its respective LDO and activates a 385Ω internal discharge path to pull the output to GND. Driving both inputs low shuts down the entire IC, reducing total supply current to 0.01µA. Each input accepts standard logic-level signals.

What package type is used for the MAX8559EBAGJ+T and what are its key mechanical dimensions?

The MAX8559EBAGJ+T uses an 8-bump UCSP (Ultra Compact Silicon Package) measuring 2.06mm × 1.03mm with 0.4mm bump pitch. It has no exposed thermal paddle. This lead-free, RoHS-compliant package provides a 2mm² footprint - approximately 75% smaller than the 8-pin TDFN variant - making it ideal for ultra-dense portable PCB layouts.