Analog Devices Inc./Maxim Integrated MAX15102EWL+T

Overview

MAX15102EWL+T from Maxim Integrated is a 2A, adjustable-output low-dropout linear regulator optimized for server, networking, and telecom power delivery. It operates from 1.7V to 5.5V input, delivers output down to 0.6V with ±1.6% accuracy over line/load/temperature, guarantees ≤150mV dropout at 2A, and integrates foldback current limiting and thermal shutdown. It powers sensitive processor cores and PLLs in high-density datacom systems.

For engineers reviewing the MAX15102EWL+T datasheet, MAX15102EWL+T pinout, MAX15102EWL+T application, or MAX15102EWL+T equivalent, key selection criteria include guaranteed 150mV dropout at full load, 15µV_RMS output noise, 9.2µA soft-start charging current, ±1.6% output accuracy, and WLP package thermal performance on four-layer PCBs.

Technical Context

The MAX15102EWL+T uses an internal p-channel MOSFET pass transistor with 25mΩ R_DS(ON), enabling low dropout and minimal quiescent current (1.8mA in dropout). Its feedback loop references a precise 600mV bandgap voltage, with FB threshold accuracy of 590–610mV across temperature and load.

Power sequencing is supported via active-high EN input (1.2V logic-high threshold), open-drain PG output (650mV trip point with 15mV hysteresis), and SS_BYP pin that simultaneously controls soft-start ramp time and bypass filtering. Thermal protection activates at +160°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MAX15102EWL+T is housed in a 15-bump, 1.6mm × 2.7mm Wafer-Level Package (WLP) with exposed die pad for thermal conduction. The package supports JEDEC J-STD-020A reflow only; hand/wave soldering is prohibited.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A8300RGRT and ADM7172ACPZ-R7, the MAX15102EWL+T offers unique integration of SS_BYP noise filtering, foldback current limiting, and 1.6mm × 2.7mm WLP size-making it optimal for space-constrained, thermally demanding telecom and server modules where fault robustness and layout simplicity are prioritized.

Availability

MAX15102EWL+T is available at Aetrix Electronics and suitable for networking infrastructure, telecom base stations, and high-density server power delivery requiring stable component supply, extended temperature support (-40°C to +105°C), and RoHS-compliant packaging.

Supply support for MAX15102EWL+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 high-performance analog and mixed-signal ICs for power, interface, sensing, and timing applications in industrial, communications, and computing markets.

The MAX15102EWL+T belongs to Maxim's high-density POL LDO family, engineered specifically for low-noise, thermally robust point-of-load regulation in space-constrained networking and server systems.

FAQ

What is the minimum input voltage required for MAX15102EWL+T to regulate a 1.0V output?

The MAX15102EWL+T guarantees regulation as long as input voltage exceeds output voltage by ≥150mV at full 2A load. For a 1.0V output, minimum VIN is 1.15V. At lighter loads, dropout decreases - e.g., 50mV at 2A with VOUT = 5V per datasheet graphs - but design margin should use the guaranteed 150mV spec. The device also features undervoltage lockout (UVLO) that disables regulation below ~1.624V VIN, ensuring clean startup behavior.

How does the SS_BYP pin function in MAX15102EWL+T, and what capacitor value is recommended?

The SS_BYP pin on the MAX15102EWL+T serves dual roles: it accepts an external capacitor to reduce high-frequency output noise and controls soft-start timing via constant 9.2µA charging current. A 100nF capacitor yields ~6.3ms soft-start time (t_SS = 6.315×10⁻⁵ × C_SS). Capacitor values between 30nF and 100nF (≥5V rating) are recommended; leaving SS_BYP unconnected disables both functions. This pin is not a standard bypass - it directly modulates the error amplifier's reference ramp.

Does MAX15102EWL+T support reverse current blocking, and how is it implemented?

The MAX15102EWL+T does not include active reverse current blocking. Its p-channel MOSFET pass transistor inherently blocks reverse current when V_OUT > V_IN, due to the body diode orientation. However, this blocking is passive and relies on the MOSFET's channel not turning on - no additional circuitry enforces it. In applications where reverse current must be strictly prevented (e.g., OR-ing configurations), an external Schottky diode or ideal diode controller is required. The datasheet does not specify reverse leakage beyond standard GND pin leakage (<4.6nA).

What is the thermal resistance (θ_JA) of MAX15102EWL+T, and how does PCB layout affect it?

The MAX15102EWL+T has a junction-to-ambient thermal resistance (θ_JA) of +30°C/W on a standard four-layer board per JEDEC 51-7. This value assumes specific copper area and via placement - doubling thermal vias under the WLP pad and connecting them to inner ground planes can reduce θ_JA by up to 30%. The package's 1538mW maximum power dissipation at +70°C ambient is derated by 19.2mW/°C above that temperature. Layout best practices include removing solder mask over thermal pads and using ≥2.5mm-wide traces for IN/OUT.

Can MAX15102EWL+T be used with ceramic output capacitors below 22µF, and what is the minimum ESR requirement?

Yes - the MAX15102EWL+T is stable with ceramic output capacitors as low as 10µF for ≤1A loads, per Applications Information. However, for full 2A operation and optimal transient response, ≥22µF is recommended. Critical to stability is ESR: capacitors must have ≤50mΩ ESR across operating temperature and bias voltage. X5R/X7R dielectrics are acceptable if manufacturer specs confirm ESR remains below 50mΩ at rated voltage and −40°C to +105°C. High-ESR or aging-prone capacitors risk instability or excessive overshoot.