Analog Devices Inc./Maxim Integrated MAX8883EUTA5

Overview

MAX8883EUTA5 from Maxim Integrated is a dual low-noise, low-dropout linear regulator with fixed 3.3V and 1.8V outputs, delivering up to 160mA per channel from a +2.5V to +6.5V input. It features independent logic-controlled shutdown inputs (SHDNA/SHDNB), 72mV dropout at 80mA load, and 165µA quiescent current with both LDOs active-designed for µP/DSP core/IO power in battery-powered portable electronics.

For engineers reviewing the MAX8883EUTA5 datasheet, MAX8883EUTA5 pinout, MAX8883EUTA5 application, or MAX8883EUTA5 equivalent, key selection criteria include dual independent shutdown control, guaranteed 160mA per output, low 40µVRMS noise (shared reference architecture), and SOT23-6 package compatibility with space-constrained handheld instruments and digital cameras.

Technical Context

The MAX8883EUTA5 integrates two independent P-channel MOSFET pass transistors (1Ω typical R_DS(ON)) enabling load-proportional dropout behavior-72mV at 80mA-and eliminating base-drive current losses common in PNP-based regulators. Its internal reference is shared between outputs but bypassed externally via BP pin only on MAX8882; MAX8883 omits BP and instead provides separate SHDNA/SHDNB inputs for granular power domain control.

Each regulator includes independent current limiting (160mA min guarantee), thermal shutdown at +160°C with 10°C hysteresis, and short-circuit protection. PSRR is 60dB at 100Hz (measured at V_OUTB), and channel-to-channel isolation exceeds 60dB below 10kHz-critical for mixed-voltage SoC power domains requiring noise separation between core and I/O rails.

Key Specifications

Pinout & Package

MAX8883EUTA5 is housed in a 6-pin SOT23-6 package with exposed pad (not electrically connected), requiring soldering to PCB ground plane for optimal thermal dissipation. Pin 2 (GND) serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6223D331MR-G and RT9193-33GB, the MAX8883EUTA5 uniquely delivers independent shutdown control, lower dropout (72mV vs. ≥250mV), and integrated dual-rail regulation in one SOT23-6 package-reducing BOM count and simplifying power sequencing in space-constrained portable systems.

Availability

MAX8883EUTA5 is available at Aetrix Electronics and suitable for µP/DSP core/IO power, digital cameras, and hand-held instruments requiring stable component supply with guaranteed long-term availability.

Supply support for MAX8883EUTA5 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 industrial, automotive, communications, and consumer applications.

The MAX8882/MAX8883 product line targets battery-powered portable electronics requiring ultra-low quiescent current, dual independent LDOs, and minimal PCB footprint-optimized for handheld instruments, PDAs, and digital cameras.

FAQ

What are the fixed output voltages of the MAX8883EUTA5?

The MAX8883EUTA5 provides fixed 3.3V on OUTA and fixed 1.8V on OUTB-factory-trimmed and non-adjustable. These values are confirmed in the Selector Guide table where MAX8883EUTA5 is explicitly listed with VOUTA = 3.3V and VOUTB = 1.8V. No external resistors or feedback networks are required, simplifying design and reducing bill-of-materials count for dual-rail applications.

Does the MAX8883EUTA5 support independent shutdown of each output?

Yes, the MAX8883EUTA5 features two independent logic-controlled shutdown inputs: SHDNA controls OUTA (3.3V) and SHDNB controls OUTB (1.8V). Driving either input low disables its respective regulator while the other remains active. Both inputs must be low to achieve full-chip shutdown with 10nA supply current. This capability is unique to the MAX8883 variant and is documented in the Pin Description and Detailed Description sections.

What is the dropout voltage specification for the MAX8883EUTA5 at full load?

The MAX8883EUTA5 has a guaranteed maximum dropout voltage of 144mV at 80mA load (per Electrical Characteristics table), with a typical value of 72mV. At 160mA, the dropout increases proportionally due to its P-channel MOSFET architecture-approximately 144mV (2× load → 2× dropout). This behavior is confirmed in the DROPOUT VOLTAGE vs. LOAD CURRENT graph (toc04) and aligns with R_DS(ON) × I_LOAD physics.

Can the MAX8883EUTA5 be used with ceramic output capacitors?

Yes, the MAX8883EUTA5 is optimized for ceramic capacitors. The datasheet specifies 2.2µF ceramic capacitors (X7R or X5R dielectric, ≤0.5Ω ESR) on both IN and OUT pins for stable operation across -40°C to +85°C. Larger values (up to 10µF) improve load transient response. Z5U/Y5V dielectrics are discouraged due to capacitance drift; using them may require ≥4.7µF to ensure stability below -10°C.

What thermal protection features does the MAX8883EUTA5 include?

The MAX8883EUTA5 incorporates thermal-overload protection that disables both regulators when junction temperature exceeds +160°C, with 10°C hysteresis for automatic recovery. This feature prevents permanent damage during sustained overload or poor PCB thermal design. The GND pin serves as the primary thermal conduction path-designers must solder it to a large copper area or ground plane to maintain junction temperature below the +150°C absolute maximum rating during continuous 160mA operation.