Monolithic Power Systems Inc. EV4432-L-00A

Overview

EV4432-L-00A from Monolithic Power Systems is an end-of-life evaluation board for the MPQ4432GL synchronous step-down converter IC, supporting 3.3V–36V input and delivering up to 2.2A at 3.3V output with AAM light-load efficiency mode, programmable 350kHz–2.5MHz switching frequency, and integrated 90mΩ/40mΩ MOSFETs. It is fully assembled and tested for automotive and industrial power system validation.

For engineers reviewing the EV4432-L-00A datasheet, EV4432-L-00A pinout, EV4432-L-00A application, or EV4432-L-00A equivalent, this board enables rapid characterization of MPQ4432GL's dynamic response, soft-start behavior, sync functionality, and thermal performance under real-world load and input conditions.

Technical Context

The EV4432-L-00A implements the MPQ4432GL - a current-mode, frequency-programmable buck regulator with internal high-side and low-side MOSFETs, 80ns minimum on-time, and selectable forced CCM or Advanced Asynchronous Modulation (AAM) operation. Its control loop supports fast transient response and stable regulation across wide VIN and load ranges.

Board-level features include external resistor-programmable soft-start (via SS pin and C3), external frequency setting (FREQ pin with R4), SYNC pin configurable for external clock synchronization or CCM/AAM mode selection, and PG (power-good) status indication. Input EMC filtering and output LC stage use optimized 1210/0603 ceramic capacitors and XAL6060-103MEB inductor.

Key Specifications

Availability

EV4432-L-00A is available at Aetrix Electronics and suitable for automotive infotainment power validation, industrial sensor node supply design, and embedded controller auxiliary rail development requiring stable component supply during legacy design support phases.

Supply support for EV4432-L-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.

The MPQ4432GL product line targets automotive-grade power management applications, designed for AEC-Q100 Grade-1 compliance and operation in harsh environments including start-stop battery transients and extended temperature ranges.

FAQ

What is the functional status of EV4432-L-00A?

EV4432-L-00A is officially marked End-of-Life (EOL) by MPS and superseded by EVQ4432-L-00A. It remains available for legacy design support and qualification retesting but is not recommended for new designs. No further revisions or manufacturing runs are planned.

Can EV4432-L-00A be used to evaluate other MPQ4432 variants?

Yes - the board is designed specifically for the MPQ4432GL QFN-16 package and is compatible with MPQ4432G (non-automotive grade) and MP4432 (commercial version), as all share identical pinout, electrical characteristics, and footprint. Differences in AEC-Q100 qualification do not affect board-level evaluation.

How is output voltage adjusted on this evaluation board?

Output voltage is set by the onboard resistor divider (R7 = 1MΩ, R8 = 316kΩ) configured for 3.3V. To change VOUT, replace R8 using the formula RFB2 = RFB1 × (VOUT − 0.8V) / 0.8V, with RFB1 ≈ 41.2kΩ. The board includes test points for easy rework and verification.

What is the role of the SYNC pin on EV4432-L-00A?

The SYNC pin serves dual functions: (1) when driven high before startup, it forces continuous conduction mode (CCM); when floating or low, it enables AAM mode; (2) when supplied with a 350kHz–2.5MHz external clock signal, it synchronizes the internal oscillator, reducing EMI and enabling multi-phase coordination.

Does EV4432-L-00A include input EMI filtering?

Yes - the board integrates a two-stage input EMC filter: CIN1–CIN6 (10µF × 4 + 0.1µF × 2) and R5 (20Ω) form a damped π-filter, while C1A/C1B/C1C/C1D provide bulk and high-frequency decoupling. This design meets CISPR 25 Class 5 requirements when combined with proper layout and cabling practices.

Is thermal performance data available for this board?

Yes - MPS provides test reports showing ≤25°C temperature rise above ambient at 2.2A/12VIN/3.3VOUT in still air, measured at the MPQ4432GL case. The QFN-16 package uses wettable flanks and thermal pad soldering to PCB ground plane, enabling direct thermal imaging and IR validation per JEDEC JESD51 standards.