Analog Devices Inc./Maxim Integrated MAX38903EVKIT#WLP

Overview

MAX38903EVKIT#WLP from Analog Devices is an evaluation kit for the MAX38903C low-noise, 1A LDO linear regulator in wafer-level package (WLP), supporting 0.6V–5.0V adjustable output, 5.5μVRMS noise (10Hz–100kHz), ±1% DC accuracy, and 100mV dropout at full load - designed for high-resolution data acquisition and high-end audio power rail validation.

For engineers reviewing the MAX38903EVKIT#WLP datasheet, MAX38903EVKIT#WLP pinout, MAX38903EVKIT#WLP application, or MAX38903EVKIT#WLP equivalent, this kit enables rapid characterization of WLP-based MAX38903C performance under real-world load transients, PSRR, soft-start behavior, and thermal response - with pre-layout optimized PCB, BYP/IN/OUT capacitor footprints, and EN/EN-controlled sequencing support.

Technical Context

The MAX38903EVKIT#WLP implements the MAX38903C regulator in its native 9-bump, 0.4mm-pitch, 1.4mm × 1.4mm WLP configuration, featuring FB-based output voltage adjustment (0.6V–5.0V), active discharge (800Ω), programmable soft-start via BYP capacitor (0.001–0.1μF), and integrated overcurrent/thermal protection. It supports input voltages from 1.7V to 5.5V and operates across –40°C to +125°C.

Unlike TDFN-based variants, this kit validates the compact WLP footprint's thermal performance (θJA = 83.98°C/W on 4-layer board) and stability with ≥4μF ceramic output capacitance, while preserving all core features: 70dB PSRR at 10kHz, reverse current protection, and <1μA shutdown current - without requiring external POK or SEL pins.

Key Specifications

Availability

MAX38903EVKIT#WLP is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, high-end audio subsystems, and medical sensor front-ends requiring stable component supply, fast design validation cycles, and WLP-specific thermal and layout verification.

Supply support for MAX38903EVKIT#WLP 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, serving precision instrumentation, communications, and industrial markets since 1965.

The MAX38903 family was developed to address ultra-low-noise, high-accuracy power delivery needs in sensitive analog signal chains - specifically targeting applications where PSRR, output noise, and thermal efficiency in miniature packages are decisive.

FAQ

What is the primary function of the MAX38903EVKIT#WLP?

The MAX38903EVKIT#WLP is an evaluation platform for the MAX38903C - a 1A, low-noise LDO in wafer-level package - enabling engineers to validate output regulation accuracy, transient response, PSRR, thermal behavior, and soft-start timing under real operating conditions before integrating the MAX38903C into final PCB layouts.

Does the MAX38903EVKIT#WLP support factory-programmed output voltages like the MAX38903D?

No. The MAX38903EVKIT#WLP is configured for the MAX38903C, which uses external FB resistors to set output voltage (0.6V–5.0V). It does not support factory-trimmed outputs like the MAX38903D; voltage selection requires R1/R2 resistor placement per the formula R1 = R2 × (VOUT/0.6V − 1).

Can the MAX38903EVKIT#WLP be used to evaluate POK functionality?

No. The MAX38903EVKIT#WLP maps to the MAX38903C, which lacks the POK (Power-OK) output found only on the MAX38903B variant. POK evaluation requires the MAX38903B-based evaluation kit (e.g., MAX38903EVKIT#TDFN-B), not the WLP version.

What capacitor values are pre-populated or recommended for the MAX38903EVKIT#WLP?

The MAX38903EVKIT#WLP supports standard decoupling: 10μF X5R/X7R ceramic for CIN (IN-to-GND), 10μF for COUT (OUT-to-GND), and 0.01μF (10nF) for CBYP (BYP-to-OUT). These match the reference design in the MAX38903C datasheet and ensure stability, low noise, and proper soft-start slew rate (5V/ms).

Is thermal performance data included with the MAX38903EVKIT#WLP?

Yes. The MAX38903EVKIT#WLP enables direct measurement of thermal characteristics for the MAX38903C in its native WLP package, including junction-to-ambient θJA = 83.98°C/W (4-layer board), validated via onboard test points and thermal vias tied to the WLP's solder bumps - critical for compact, thermally constrained designs.