Monolithic Power Systems Inc. EV5921-V-01A

Overview

EV5921-V-01A from Monolithic Power Systems is an evaluation board for the MP5921GV hot-swap Intelli-Fuse controller, integrating four parallel MP5921 devices in FCQFN 4mm×5mm packages to deliver up to 200A total continuous current (50A per device, 60A with airflow) at 12V input with 1mΩ R_DS(on). It supports programmable current limiting, soft-start, over-temperature and short-circuit protection, and fuse health reporting for live-insertion applications.

For engineers reviewing the EV5921-V-01A datasheet, EV5921-V-01A pinout, EV5921-V-01A application, or EV5921-V-01A equivalent, this board enables rapid validation of high-current hot-swap architecture, phase configuration (1–4 phase), current-sense calibration, fault signaling (ALERT, D_OC, FLTB_A), and parallel MOSFET gate drive timing in server backplane, storage, and networking power systems.

Technical Context

The EV5921-V-01A implements a multi-phase hot-swap reference design using four MP5921GV controllers, each driving its own integrated 1mΩ high-side MOSFET. Each channel provides independent current limit programming via CLREF, soft-start control via SS, and real-time current monitoring via IMON.

Board-level features include configurable ON/PD logic for power-down sequencing, separate GPIOs (GPIO1–3) for status feedback, I²C interface (SCL/SDA) for digital telemetry, and dedicated test points (TEMP, T2, VOSEN, VINSEN) for thermal and voltage sensing validation under load.

Key Specifications

Availability

EV5921-V-01A is available at Aetrix Electronics and suitable for server backplane validation, enterprise SSD power sequencing, telecom line card hot-swap qualification, and high-density computing power architecture development requiring stable component supply and repeatable lab verification.

Supply support for EV5921-V-01A 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 expertise in DC/DC conversion, motor drivers, and intelligent power management solutions.

The EV5921-V-01A belongs to MPS's Hot-Swap & Intelli-Fuse Evaluation Platform product line, designed specifically to accelerate system-level validation of high-current, fault-resilient power insertion in datacenter, storage, and infrastructure equipment.

FAQ

What is the default operating configuration of the EV5921-V-01A?

The board ships configured for 4-phase operation, with all four MP5921GV devices active and synchronized. This delivers full 200A capability and enables evaluation of parallel current sharing, thermal distribution, and coordinated fault response across multiple hot-swap channels.

How do I configure the board for single-phase operation?

To configure for 1-phase, remove U2, U3, and U4; install 0Ω resistors at R22, R51, and R78 (ON/PD grounding); replace C14, C33, and C46 with 0Ω resistors; and retain only U1 with its associated CLREF, SS, and IMON connections active per MP5921GV datasheet timing requirements.

Does the board support I²C-based telemetry and configuration?

Yes - SCL and SDA pins are routed to accessible test points and support readback of die temperature, output current, and fault status via the MP5921GV's internal registers. Address selection is enabled through ADDR pin strapping, allowing up to eight unique I²C addresses on multi-board systems.

What thermal management provisions does the board include?

The board integrates TEMP test point for direct die temperature monitoring, uses 2oz copper layers on inner planes (Fig. 2–3), and places MP5921GV devices over large GND thermal pads. The 4.7mF bulk capacitor (C3) and 220pF COG ceramics (C7/C14/C33/C46) stabilize transient response during inrush events.

Can the EV5921-V-01A be used to validate custom current-limit thresholds?

Yes - the CLREF input accepts 0–1.2V analog voltage to set per-device current limit from 10A to 60A. The board includes precision resistor networks (e.g., R2/R62 = 40.2kΩ) for stable reference generation, and CLREF test points allow direct injection or feedback loop validation.

What safety protections are implemented at the board level?

In addition to MP5921GV's internal protections, the board includes SMDJ12A TVS diode (D1) for input surge suppression, MBRS540T3 Schottky (D2) for reverse-polarity blocking, and Keystone 7701 30A connectors (P1/P2) rated for repeated hot-plug cycles without contact degradation.