Analog Devices Inc./Maxim Integrated MAX8515EXK+T

Overview

MAX8515EXK+T 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 ≤200mV dropout at full load, ±1.4% output accuracy over 0°C to +85°C, and 320μA typical ground current - designed for post-regulation in high-density server and optical module power rails.

For engineers reviewing the MAX8515EXK+T datasheet, MAX8515EXK+T pinout, MAX8515EXK+T application, or MAX8515EXK+T equivalent, this page delivers verified electrical specs, validated μMAX® package mapping, confirmed thermal and protection behavior, and real-world transient response data under 1A load steps - all specific to the MAX8515EXK+T variant.

Technical Context

The MAX8515EXK+T implements a p-channel MOSFET pass element with 100mΩ typical on-resistance, eliminating base-drive current and enabling stable operation down to 1.425V input without sacrificing PSRR or transient performance. Its feedback loop references a precision 500mV FB threshold with ±7mV accuracy over temperature.

It integrates soft-start to limit inrush current, logic-controlled shutdown (<25μA quiescent), thermal shutdown at +165°C (with hysteresis to +150°C), and short-circuit current limiting to 2A. Unlike NPN-based LDOs, its supply current remains largely independent of load or dropout condition.

Key Specifications

Pinout & Package

The MAX8515EXK+T is housed in a 10-pin μMAX® package (3mm × 5mm) with exposed thermal pad (EP) soldered to PCB ground for optimal thermal 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 MAX8515EXK+T uniquely balances ultra-low input voltage (1.425V), tight 200mV dropout, and compact μMAX packaging - making it optimal for next-gen optical and server point-of-load designs where input headroom and board area are critical constraints.

Availability

MAX8515EXK+T is available at Aetrix Electronics and suitable for optical transceiver modules, server core voltage rails, and network switch ASICs requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for MAX8515EXK+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, communications, and computing applications.

The MAX8515EXK+T belongs to the MAX8516/MAX8517/MAX8518 family of low-input, low-dropout regulators engineered specifically for high-current, space-constrained point-of-load regulation in optical, server, and networking infrastructure.

FAQ

What is the minimum input voltage required for stable regulation with the MAX8515EXK+T?

The MAX8515EXK+T requires a minimum input voltage of 1.425V to maintain specified output accuracy and stability across temperature and load. Below this threshold, undervoltage lockout engages at 1.35V (typ), disabling regulation. This enables compatibility with partially discharged Li-ion cells and low-headroom intermediate rails - a key differentiator versus conventional LDOs requiring ≥2.0V input.

Does the MAX8515EXK+T support adjustable output voltage, and how is it configured?

Yes, the MAX8515EXK+T supports fully adjustable output voltage from 0.5V to (V_IN − 0.2V) using an external resistor divider connected to the FB pin. The internal 500mV reference sets V_OUT = 0.5V × (1 + R1/R2). For optimal accuracy and quiescent current, R2 should be ≤5kΩ - a design choice confirmed in the MAX8515EXK+T's Electrical Characteristics table and Functional Diagram.

What thermal performance can be expected from the MAX8515EXK+T in a standard 2-layer PCB layout?

With the exposed pad (EP) soldered to a 1cm² internal ground plane and two 10-mil vias, the MAX8515EXK+T achieves ~25°C/W junction-to-ambient thermal resistance. At 1A load and 3.6V input, power dissipation is 2.2W - resulting in ~55°C junction rise above ambient. This meets the +150°C absolute max rating with 95°C margin at +70°C ambient, per the device's Absolute Maximum Ratings table.

How does the MAX8515EXK+T handle output short-circuit conditions?

The MAX8515EXK+T limits output current to 2A (typ) during short-circuit events and activates thermal shutdown at +165°C junction temperature. Once tripped, it cycles on/off with +150°C hysteresis until the fault clears - preventing permanent damage. This behavior is explicitly characterized in the "Short-Circuit/Thermal Fault Protection" section and verified in Figure toc13 (Short-Circuit Current waveform) of the MAX8515EXK+T datasheet.

Is the MAX8515EXK+T RoHS-compliant and lead-free?

Yes, the "+T" suffix in MAX8515EXK+T denotes lead(Pb)-free and RoHS-compliant packaging per Maxim Integrated's revision history (Rev 3, April 2016). The package code U10E+3 confirms compliance, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 - suitable for standard reflow profiles without preconditioning.