Analog Devices Inc./Maxim Integrated MAX38904CANL+T

Overview

MAX38904CANL+T from Analog Devices is a 2A, low-noise LDO linear regulator in wafer-level package (WLP), delivering ±1% output accuracy over load/line/temperature with only 5.1μVRMS noise (10Hz–100kHz) and 100mV max dropout at full load. It operates from 1.7V to 5.5V input and supports adjustable output voltage (0.6V–5.0V) via external feedback resistors. Used in high-resolution data acquisition systems requiring ultra-low noise and tight regulation.

For engineers reviewing the MAX38904CANL+T datasheet, MAX38904CANL+T pinout, MAX38904CANL+T application, or MAX38904CANL+T equivalent, this page provides verified technical context, WLP-specific pin mapping, soft-start programmability, active discharge (70Ω), and real-world selection guidance against comparable regulators for medical instrumentation and precision analog front-ends.

Technical Context

The MAX38904CANL+T implements a PMOS-based LDO architecture with internal 0.6V reference and resistor-programmable feedback loop, enabling precise output voltage setting across 0.6V–5.0V. Its BYP pin controls soft-start slew rate and noise filtering via an external capacitor (1nF–100nF), directly influencing startup transient behavior and PSRR performance.

It integrates overcurrent protection (2.2–3.4A trip), thermal shutdown (165°C rising / 150°C falling), reverse-current blocking, and active discharge (70Ω from OUT to GND when disabled). The 5×3 bump WLP package (2.2mm × 1.37mm, 0.4mm pitch) requires four-layer PCB layout with thermal vias under the exposed pad for θJA = 61.55°C/W.

Key Specifications

Pinout & Package

MAX38904CANL+T uses a 5×3 bump, 0.4mm pitch wafer-level package (WLP), outline number 21-100315, with land pattern per Application Note 1891. Exposed die attach area serves as thermal path; no EP pad connection required.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6217D332MR-G and ADM7172ACPZ-R7, MAX38904CANL+T uniquely balances 2A capability, WLP miniaturization (2.2mm × 1.37mm), and 5.1μVRMS noise-making it optimal for space-constrained, high-precision analog systems where thermal density and sequencing control matter.

Availability

MAX38904CANL+T is available at Aetrix Electronics and suitable for medical imaging sensor power, precision data acquisition front-ends, high-end audio DAC supply, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges (-40°C to +125°C).

Supply support for MAX38904CANL+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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX38904 family was designed specifically for ultra-low-noise, high-accuracy power regulation in precision analog systems-including medical, test equipment, and high-resolution data acquisition-where traditional LDOs fail to meet noise and accuracy targets.

FAQ

What is the maximum output current and dropout voltage specification for MAX38904CANL+T?

The MAX38904CANL+T delivers up to 2A continuous output current with a maximum dropout voltage of 100mV at full load (2A), measured at VIN = 3.6V in WLP package. This allows stable 3.3V output from a 3.4V input, supporting battery-powered applications near end-of-life voltage. Dropout remains ≤200mV down to VIN = 2.5V, per datasheet Table on page 5.

Does MAX38904CANL+T include power-good signaling or enable functionality?

MAX38904CANL+T includes an active-high EN pin for full enable/disable control but does not integrate a POK (power-ok) output - unlike the MAX38904BATD+ variant. When EN is pulled low, the device disables and activates its 70Ω active discharge circuit on the OUT pins. No separate status signal is provided; system-level monitoring must be implemented externally.

What package type and thermal characteristics apply to MAX38904CANL+T?

MAX38904CANL+T uses a 5×3 bump, 0.4mm pitch wafer-level package (WLP), outline 21-100315. Its thermal resistance is θJA = 61.55°C/W on a four-layer board. Unlike TDFN variants, it has no exposed pad (EP); heat dissipation relies on solder joint conduction through the 15 bumps. Layout must follow AN-1891 land pattern with thermal vias under the die area.

How is output voltage set on MAX38904CANL+T, and what is the feedback reference voltage?

MAX38904CANL+T uses external resistor feedback via the FB pin to set output voltage from 0.6V to 5.0V. The internal reference is precisely trimmed to 0.6V, so VOUT = 0.6V × (1 + R2/R1). R1 should be ≤300kΩ to minimize bias current error. This configuration matches the MAX38904B/C variants and differs from the pin-selectable MAX38904A or factory-programmed MAX38904D.

What protection features are integrated into MAX38904CANL+T?

MAX38904CANL+T integrates overcurrent protection (trip range 2.2–3.4A), thermal shutdown (165°C rising / 150°C falling), reverse-current blocking (prevents >800mA backfeed when VOUT > VIN), and active discharge (70Ω from OUT to GND during disable). All protections are fully autonomous and require no external components.