Analog Devices Inc./Maxim Integrated MAX15101EWL+T

Overview

MAX15101EWL+T from Maxim Integrated is a 1A, low-dropout linear regulator with ±1.6% output accuracy over line/load/temperature, 100mV guaranteed dropout at full load, and adjustable 0.6V–5.2V output voltage. It features foldback current limiting, thermal shutdown, power-good output, enable input, and external bypass/soft-start control for precise sequencing in high-density server and networking power rails.

For engineers reviewing the MAX15101EWL+T datasheet, MAX15101EWL+T pinout, MAX15101EWL+T application, or MAX15101EWL+T equivalent, this device supports critical low-noise, low-voltage core supply domains requiring tight regulation, fast transient response, and robust fault protection in telecom infrastructure and datacom systems.

Technical Context

The MAX15101EWL+T uses an internal p-channel MOSFET pass transistor with 20mΩ R_DS(ON), enabling ultra-low dropout (25mV typical at 1A) and sub-2mA quiescent current even in dropout. Its feedback architecture centers on a 600mV reference with ±7mV threshold accuracy and <1µA FB bias current.

Power sequencing is implemented via active-high EN, open-drain PG (650mV trip with 15mV hysteresis), and SS_BYP pin controlling soft-start ramp time (t_SS = 63.15 × C_SS in nF). Noise is minimized by external bypass capacitor and achieves 15µV_RMS (500Hz–100kHz) output voltage noise.

Key Specifications

Pinout & Package

MAX15101EWL+T is housed in a 15-bump, 1.6mm × 2.7mm Wafer-Level Package (WLP) with 0.4mm pitch, optimized for high-density PCB layouts and thermal performance via direct die-to-board conduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS7A4700RGWR and ADM7172ACPZ-R7, the MAX15101EWL+T offers the smallest footprint (1.6mm × 2.7mm), dedicated SS_BYP noise filtering, and widest output adjustability (0.6V–5.2V), making it optimal for space-constrained, multi-rail telecom and server POL applications where flexibility and board area are critical.

Availability

MAX15101EWL+T is available at Aetrix Electronics and suitable for networking switch ASIC core supply, telecom line card PLL power, server memory buffer (DDR4/5 VPP), and base station RF front-end bias applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX15101EWL+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 MAX15101EWL+T belongs to Maxim's high-performance LDO family targeting dense, thermally constrained infrastructure equipment; it was engineered specifically to replace discrete solutions in server, networking, and telecom power rails where size, noise, and sequencing reliability are paramount.

FAQ

What is the maximum output current capability of the MAX15101EWL+T under continuous operation?

The MAX15101EWL+T delivers up to 1A continuous output current at ambient temperatures up to +70°C with proper PCB copper area and thermal vias. At +85°C ambient, derating applies per the thermal resistance (θ_JA = 30°C/W); the device maintains full 1A capability if junction temperature remains below +150°C. The in-regulation current limit is 1.62A (typical), with foldback reducing short-circuit current to 1A.

How does the SS_BYP pin function in the MAX15101EWL+T, and what capacitor value is recommended?

The SS_BYP pin on the MAX15101EWL+T serves dual roles: it reduces high-frequency output noise via external bypass capacitance and controls soft-start ramp time via a constant 9.2µA charging current. A ceramic capacitor (30nF to 100nF, ≥5V rating) is recommended between SS_BYP and GND; for example, 100nF yields ~6.3ms soft-start time. Leaving SS_BYP unconnected disables soft-start and bypass functionality.

What is the guaranteed dropout voltage specification for the MAX15101EWL+T at full load?

The MAX15101EWL+T guarantees a dropout voltage of less than 100mV at 1A load current and 593mV–606mV FB threshold, defined as VIN − VOUT when VOUT falls 3% below nominal. Typical dropout is 25mV at 1A due to its 20mΩ p-channel pass transistor R_DS(ON), enabling efficient operation with minimal input-output differential voltage.

Does the MAX15101EWL+T support adjustable output voltage, and how is it configured?

Yes, the MAX15101EWL+T supports adjustable output from 0.6V to 5.2V using an external resistive divider connected to the FB pin. The output voltage is calculated as VOUT = 0.6V × (1 + R1/R2), where R2 is typically 600Ω. For example, setting R1 = 900Ω yields VOUT = 1.5V. The FB input draws only 1µA, minimizing divider current error and enabling high-resistance networks for low-power biasing.

What protection features are integrated into the MAX15101EWL+T?

The MAX15101EWL+T integrates foldback current limiting (1.6A in regulation, folding to 1A at low VOUT), thermal shutdown (+160°C trip with 15°C hysteresis), input undervoltage lockout (1.624V to 1.69V with 40mV hysteresis), and output short-circuit tolerance. It also features power-good monitoring and enable-controlled shutdown with 1µA ground current in disable mode - collectively ensuring robust operation in mission-critical infrastructure power systems.