Analog Devices Inc./Maxim Integrated MAX8517EUB+T

Overview

MAX8517EUB+T from Maxim Integrated is a 1A, low-dropout linear regulator with PMOS pass transistor architecture, operating from 1.425V to 3.6V input and delivering adjustable output (0.5V to VIN−0.2V) with ±1.4% accuracy over 0°C to +85°C. It features a power-OK (POK) open-drain output, 200mV dropout at 1A, and 340μA typical ground current in dropout - used in high-density server VRMs and optical module post-regulation.

For engineers reviewing the MAX8517EUB+T datasheet, MAX8517EUB+T pinout, MAX8517EUB+T application, or MAX8517EUB+T equivalent, this page delivers verified electrical parameters, validated μMAX® 10-pin terminal mapping, confirmed POK functionality, thermal protection behavior, and real-world transient response data for rapid power-rail design validation.

Technical Context

The MAX8517EUB+T 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 performance. Its error amplifier includes inherent soft-start and supports external feedback via FB pin for precise output voltage setting.

It integrates logic-controlled shutdown (EN pin), open-drain POK monitoring referenced to FB threshold (±10% window), short-circuit current limiting (1.6A–2.4A), and thermal shutdown activation at +165°C with hysteresis down to +150°C - all implemented in BiCMOS process with 2849 transistors.

Key Specifications

Pinout & Package

The MAX8517EUB+T is housed in a 10-pin μMAX® package (3mm × 5mm) with exposed 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 LT3080IMSE#PBF, the MAX8517EUB+T uniquely combines 1A delivery, integrated POK, μMAX footprint, and guaranteed 200mV dropout - making it optimal for space-constrained, digitally sequenced, high-current embedded power rails.

Availability

MAX8517EUB+T is available at Aetrix Electronics and suitable for server VRMs, optical transceivers, and 5G base station RF front-ends requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.

Supply support for MAX8517EUB+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 MAX8516/MAX8517/MAX8518 family was engineered specifically for high-current, low-input-voltage post-regulation in thermally constrained environments - emphasizing dropout efficiency, ceramic capacitor compatibility, and integrated power-monitoring functions.

FAQ

What is the maximum output current and dropout voltage specification for MAX8517EUB+T?

The MAX8517EUB+T delivers up to 1A of continuous output current with a maximum dropout voltage of 200mV at that load. This specification is guaranteed across the full operating temperature range (−40°C to +85°C) and input voltage range (1.425V to 3.6V), enabling efficient regulation in low-headroom applications such as battery-powered systems and multi-rail server boards. The 200mV dropout directly translates to reduced power loss and lower thermal stress compared to higher-dropout alternatives.

Does MAX8517EUB+T include power-good monitoring, and how does it function?

Yes, the MAX8517EUB+T integrates a dedicated open-drain power-OK (POK) output (Pin 4). POK transitions high when the regulated output is within ±10% of its nominal value, based on the FB pin voltage crossing 450mV ±10mV. It includes a 50μs internal delay to prevent chatter during marginal conditions. When the device is in shutdown or the output falls outside tolerance, POK is actively pulled low - providing deterministic sequencing and fault indication for host controllers without external comparators.

What capacitor values are required for stable operation of MAX8517EUB+T at 1A load?

For stable 1A operation, the MAX8517EUB+T requires a minimum 1μF ceramic capacitor between IN and GND, and a minimum 4.7μF ceramic capacitor between OUT and GND. These values ensure adequate input source impedance suppression and limit output voltage deviation to 45mV during 20mA→1A load steps. Smaller output capacitors may be used for loads below 1A, scaled as C_OUT = I_OUT(MAX) × (1μF/200mA), but 4.7μF remains the validated baseline for full-spec transient performance.

How does the thermal protection mechanism work in MAX8517EUB+T?

The MAX8517EUB+T features thermal-overload protection that activates at +165°C junction temperature, turning off the output to prevent damage. Once the die cools to +150°C, the device automatically resumes regulation - implementing an auto-retry cycle. This hysteresis prevents oscillation near trip point. During sustained overload or poor PCB thermal design, the exposed pad (EP) and GND pins must be soldered to a robust ground plane to maintain safe junction temperatures below the +150°C absolute maximum rating.

Can MAX8517EUB+T be used with adjustable output voltage, and what is the feedback reference voltage?

Yes, the MAX8517EUB+T supports fully adjustable output from 0.5V to (VIN − 0.2V) using an external resistor divider connected to the FB pin. Its internal feedback reference voltage is 500mV ±3mV (typical 497–503mV over temperature), with ±0.6% initial accuracy. To optimize accuracy and quiescent current, R2 should be ≤5kΩ. The output voltage is calculated as V_OUT = V_FB × (1 + R1/R2), making it suitable for custom core voltages in FPGA, ASIC, and processor applications.