Analog Devices Inc./Maxim Integrated MAX8865TEUA+

Overview

MAX8865TEUA+ from Maxim Integrated is a dual, low-dropout linear regulator IC delivering two independent 3.15V fixed outputs (T-version) or adjustable 1.25V–5.5V outputs, each capable of sourcing up to 100mA. It operates from +2.5V to +5.5V input, features 55mV dropout at 50mA, 105µA no-load supply current, and reverse battery protection-designed for space-constrained, battery-powered portable systems like cellular phones and PCMCIA cards.

For engineers reviewing the MAX8865TEUA+ datasheet, MAX8865TEUA+ pinout, MAX8865TEUA+ application, or MAX8865TEUA+ equivalent, key selection criteria include dual independent shutdown control, Dual Mode™ fixed/adjustable output configuration, thermal shutdown at +170°C, 350µVRMS output noise, and µMAX-8 package compatibility with high-density PCB layouts.

Technical Context

The MAX8865TEUA+ integrates two independent P-channel MOSFET-based LDO regulators sharing a 1.25V bandgap reference and thermal sensor, but with separate error amplifiers, MOSFET drivers, current limiters, and shutdown logic. Each regulator uses a Dual Mode™ comparator to select between internal feedback (for 3.15V fixed output) or external resistor divider (for adjustable output), triggered by SETx pin voltage below 60mV.

It employs a 1.1Ω typical R_DS(ON) PMOS pass transistor per channel, enabling ultra-low quiescent current (145µA at 200mA total load) regardless of operating mode-dropout, light load, or heavy load-while providing reverse battery protection limiting reverse current to <1mA and thermal shutdown with 20°C hysteresis.

Key Specifications

Pinout & Package

MAX8865TEUA+ is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.91mm), optimized for high thermal dissipation on compact PCBs via exposed pad soldering to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX8866TEUA+, MAX8865TEUA+ lacks auto-discharge but matches all regulation, noise, and protection specs-making it optimal for dual-rail battery systems where controlled shutdown suffices. Versus TSM1014IDT, MAX8865TEUA+ adds critical dual-channel independence, reverse protection, and flexible voltage selection at modest cost premium.

Availability

MAX8865TEUA+ is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, and palmtop computers requiring stable component supply across extended production lifecycles and temperature ranges (–40°C to +85°C).

Supply support for MAX8865TEUA+ 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 MAX8865TEUA+ belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment demanding ultra-low quiescent current, dual independent outputs, and robust fault protection.

FAQ

What output voltage does MAX8865TEUA+ deliver?

The MAX8865TEUA+ delivers two independent 3.15V fixed outputs (T-version) when SET1 and SET2 pins are grounded. It can also be configured for adjustable outputs from 1.25V to 5.5V using external resistor dividers on the SET pins. The 3.15V nominal value has ±3% tolerance over –40°C to +85°C, confirmed in the Electrical Characteristics table.

Does MAX8865TEUA+ support independent shutdown of each output?

Yes, MAX8865TEUA+ provides fully independent shutdown control: SHDN1 (Pin 7) disables OUT1, and SHDN2 (Pin 8) disables OUT2. Both are active-low inputs; pulling either to GND turns off its respective regulator while the other remains operational. This enables precise power sequencing in multi-rail systems without affecting the second output.

What is the dropout voltage specification for MAX8865TEUA+?

The MAX8865TEUA+ has a dropout voltage of 55mV at 50mA load per channel, defined as VIN – VOUT when VOUT drops 100mV below its nominal value. This low dropout enables operation down to 2.55V input for a 3.15V output, extending usable battery life in single-cell Li-ion or NiMH applications.

Is MAX8865TEUA+ protected against reverse battery connection?

Yes, MAX8865TEUA+ includes integrated reverse battery protection that limits reverse current to less than 1mA when VIN or any SHDN pin falls below GND. This is achieved by internal circuitry that disconnects parasitic conduction paths-eliminating the need for external blocking diodes and preventing battery drain or IC overheating.

What package type and thermal characteristics does MAX8865TEUA+ use?

MAX8865TEUA+ uses the 8-pin µMAX package (3.05mm × 3.05mm) with exposed thermal pad. Its thermal resistance θ_JA is 244°C/W, and maximum junction temperature is +150°C. For reliable operation at full 100mA per channel, PCB layout must provide adequate copper area connected to Pin 3 (GND) to dissipate heat-especially under high VIN–VOUT differentials.