Analog Devices Inc./Maxim Integrated MAX8559EBAGG+T

Overview

MAX8559EBAGG+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with 32µVRMS output noise, 70dB PSRR at 10kHz, and 60mV dropout at 100mA load. It features independent logic-controlled shutdown inputs (SHDNA/SHDNB), operates from 2.5V to 6.5V input, and supports factory-preset 3.0V/3.0V outputs for powering core and I/O rails in space-constrained portable electronics.

For engineers reviewing the MAX8559EBAGG+T datasheet, MAX8559EBAGG+T pinout, MAX8559EBAGG+T application, or MAX8559EBAGG+T equivalent, key selection criteria include dual-channel independent enable control, ultra-low quiescent current (115µA per LDO), absence of bypass capacitor requirement, and UCSP package compatibility with high-density PCB layouts.

Technical Context

The MAX8559EBAGG+T integrates two independent P-channel MOSFET pass transistors (0.6Ω R_DS(ON)) with internal 1.25V bandgap reference and error amplifiers. Each regulator uses an internal resistor divider for fixed 3.0V output and includes autodischarge circuitry (385Ω discharge path) during shutdown.

Its thermal protection employs dual independent sensors triggering shutdown at +160°C with 10°C hysteresis, while current limiting activates at 310mA (min) per channel. The BP pin accepts a 0.01µF ceramic capacitor to form a low-pass filter that reduces output noise below 32µVRMS.

Key Specifications

Pinout & Package

MAX8559EBAGG+T is packaged in an 8-bump UCSP (2.06mm × 1.03mm, 0.5mm pitch) with exposed substrate for thermal conduction. The lead-free package complies with RoHS and uses a "+" marking for pin 1 identification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS70245PWP and NCP1117DT33RKG, the MAX8559EBAGG+T uniquely delivers matched 3.0V/3.0V outputs in a 2mm² UCSP with sub-120µA quiescent current per channel-enabling true dual-rail power management in ultra-compact portable systems without sacrificing noise performance or thermal robustness.

Availability

MAX8559EBAGG+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 MAX8559EBAGG+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX8559 product line delivers dual, low-noise, low-quiescent-current LDOs optimized for battery-powered portable electronics where small size, low noise, and independent rail control are critical design requirements.

FAQ

What output voltages does the MAX8559EBAGG+T provide?

The MAX8559EBAGG+T is factory-configured for dual 3.0V outputs (VOUTA = 3.0V, VOUTB = 3.0V), as indicated by the "GG" suffix in the part number per Maxim's Output Voltage Selector Guide. These are fixed, non-adjustable outputs achieved using internal resistor dividers - no external components are required to set the voltage.

Does the MAX8559EBAGG+T require an external bypass capacitor on the BP pin?

Yes, the MAX8559EBAGG+T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 32µVRMS output noise. Omitting this capacitor increases output noise to 254µVRMS (typ). The capacitor must be low-leakage and placed close to the BP pin to maintain noise performance across temperature and load conditions.

Can the MAX8559EBAGG+T operate without any output capacitors?

No, the MAX8559EBAGG+T requires minimum output capacitance for stability: 2.2µF for ≤150mA loads or 4.7µF for full 300mA operation per channel. Ceramic capacitors with X5R or X7R dielectrics are recommended; tantalum capacitors are not supported. Zero-output-capacitor operation is not permitted and will cause instability.

What is the thermal shutdown behavior of the MAX8559EBAGG+T?

The MAX8559EBAGG+T features dual independent thermal sensors that disable individual LDOs when junction temperature exceeds +160°C. After shutdown, the affected regulator remains off until temperature drops by 10°C (hysteresis), then resumes normal operation. This prevents thermal oscillation and protects against sustained overload conditions in either channel.

How does the MAX8559EBAGG+T handle short-circuit conditions?

The MAX8559EBAGG+T incorporates per-channel current limiting that activates at 310mA (minimum), clamping output current to prevent damage. Both outputs can be shorted to ground continuously without failure. During short-circuit events, the device maintains thermal shutdown protection and automatically recovers once the fault is removed - no manual reset is required.