Analog Devices Inc./Maxim Integrated MAX8516EUB/V+

Overview

MAX8516EUB/V+ from Maxim Integrated is a low-dropout linear regulator with PMOS pass transistor architecture, delivering up to 1A output current from 1.425V–3.6V input while maintaining only 200mV dropout at full load. It features ±1.4% output voltage accuracy over 0°C to +85°C, 320μA typical ground current, and adjustable output from 0.5V to (VIN − 0.2V), widely deployed in post-regulation for high-efficiency server and optical module power rails.

For engineers reviewing the MAX8516EUB/V+ datasheet, MAX8516EUB/V+ pinout, MAX8516EUB/V+ application, or MAX8516EUB/V+ equivalent, key selection criteria include guaranteed 200mV dropout at 1A, ceramic-capacitor compatibility (1μF IN / 4.7μF OUT), soft-start inrush control, thermal-overload protection, and μMAX-10 package with exposed pad for thermal management.

Technical Context

The MAX8516EUB/V+ uses an internal p-channel MOSFET pass device with 100mΩ typical on-resistance, eliminating base-drive current and enabling stable operation down to 1.425V input without sacrificing transient response. Its feedback loop references a precise 500mV FB threshold with ±7mV accuracy over temperature and load.

It integrates undervoltage lockout (1.35V typ, 70mV hysteresis), logic-controlled shutdown (<25μA quiescent), short-circuit current limiting (1.6–2.4A), and thermal shutdown at +165°C (with +150°C hysteresis). Unlike NPN-based LDOs, supply current remains stable across load and dropout conditions due to zero gate-drive requirement.

Key Specifications

Pinout & Package

The MAX8516EUB/V+ is housed in a 10-pin μMAX® package (3mm × 5mm) with exposed thermal pad (EP) soldered to PCB ground for optimal power dissipation. Pin 10 is internally pulled down to GND via 10kΩ resistor and must be left floating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and MCP1826T-1202E/DB, the MAX8516EUB/V+ uniquely combines 1.425V minimum input, 200mV dropout at 1A, adjustable output, μMAX-10 thermal package, and automotive qualification - making it the only option meeting all four requirements simultaneously for compact, high-reliability embedded power rails.

Availability

MAX8516EUB/V+ is available at Aetrix Electronics and suitable for server power delivery, optical transceiver biasing, and 5G base station fronthaul requiring stable component supply, RoHS-compliant packaging, and automotive-grade reliability.

Supply support for MAX8516EUB/V+ 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, communications, and automotive applications.

The MAX8516EUB/V+ belongs to Maxim's high-performance LDO family targeting low-input, low-dropout regulation in space-constrained, thermally challenging systems - specifically engineered for post-regulation in servers, optical modules, and wireless infrastructure.

FAQ

What is the minimum input voltage required for stable operation of the MAX8516EUB/V+?

The MAX8516EUB/V+ requires a minimum input voltage of 1.425V for guaranteed specification compliance across temperature and load. Below this, undervoltage lockout activates at 1.35V (typ) with 70mV hysteresis. Operation below 1.425V may occur but is not characterized - the MAX8516EUB/V+ is designed to deliver full 1A output only when VIN ≥ 1.425V and VOUT ≤ (VIN − 0.2V).

Does the MAX8516EUB/V+ support adjustable output voltage, and how is it configured?

Yes, the MAX8516EUB/V+ supports fully adjustable output from 0.5V to 3.4V using an external resistor divider connected to the FB pin. The feedback threshold is precisely 500mV (±3mV), so VOUT = 0.5V × (1 + R1/R2). For optimal accuracy and quiescent current, R2 should be ≤ 5kΩ. The MAX8516EUB/V+ does not offer fixed-output variants - adjustment is mandatory via external resistors.

What thermal management is required for the MAX8516EUB/V+ at 1A continuous load?

The MAX8516EUB/V+ requires soldering its exposed thermal pad (EP) to a solid PCB ground plane with multiple thermal vias to maintain safe junction temperature. At TA = +70°C, maximum continuous power dissipation is 824mW (derated above +70°C). With 1A load and 300mV dropout, power dissipation is 300mW - well within limit if EP is properly connected. Without EP grounding, thermal resistance rises sharply, risking thermal shutdown above ~600mA.

How does the enable (EN) pin function on the MAX8516EUB/V+?

The EN pin on the MAX8516EUB/V+ is an active-high logic input. Pulling EN low places the device in shutdown mode, reducing ground current to <25μA and disabling the output. For always-on operation, EN must be tied to IN. During shutdown, an internal 10kΩ resistor pulls the output toward GND - this is intentional and ensures safe discharge of downstream capacitance. EN has ±1μA bias current and 1.2V rising threshold.

Is the MAX8516EUB/V+ qualified for automotive applications, and what does the "/V+" suffix indicate?

Yes, the "/V+" suffix in MAX8516EUB/V+ explicitly denotes AEC-Q200 qualification and lead(Pb)-free/RoHS-compliant packaging. This version meets automotive reliability standards including extended temperature operation (−40°C to +85°C), robust ESD tolerance, and rigorous qualification testing. The base MAX8516EUB (without /V+) is commercial grade only - the /V+ variant is the sole automotive-qualified version in this family.