Monolithic Power Systems Inc. EV5094-J-00A

Overview

EV5094-J-00A from Monolithic Power Systems is an evaluation board for the MP5094GJ dual-channel current-limiting eFuse, designed to demonstrate input transient protection, inrush current control, and output overvoltage clamping for 12V and 5V power rails. It supports programmable soft-start via external capacitor, fixed trip/hold current limits (4A/2.95A on 12V channel; 3A/2.18A on 5V channel), and thermal shutdown latch-off.

For engineers reviewing the EV5094-J-00A datasheet, EV5094-J-00A pinout, EV5094-J-00A application, or EV5094-J-00A equivalent, this board enables rapid validation of dual-rail eFuse behavior under startup, short-circuit, surge, and OVP conditions - critical for storage and hot-swap system design.

Technical Context

The EV5094-J-00A implements a hardware-based protection reference design centered on the MP5094GJ IC, which integrates two independent current-limited switches with separate R_DS(ON) (50mΩ/30mΩ), dedicated soft-start (SS) pins, and autonomous OVP triggering at 17V (12V rail) and 7V (5V rail). Each channel operates with independent enable control and hiccup-mode overcurrent response.

It validates real-world timing and fault recovery: soft-start slew rate controlled by external SS capacitors, 100ms surge tolerance at 24V (12V bus) and 16V (5V bus), and sub-100μs OVP response confirmed via oscilloscope waveforms in the test report. No microcontroller or firmware involvement is required.

Key Specifications

Availability

EV5094-J-00A is available at Aetrix Electronics and suitable for hard disk drive power sequencing, solid-state drive hot-swap validation, and industrial 12V/5V dual-rail system prototyping requiring stable component supply and repeatable protection testing.

Supply support for EV5094-J-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 analog and mixed-signal semiconductor company specializing in high-efficiency power management ICs, with over two decades of leadership in DC/DC converters, eFuses, and protection solutions.

The EV5094-J-00A belongs to MPS's evaluation board product line, developed specifically to accelerate adoption of their MP5094 family of dual-channel eFuses in storage, computing, and industrial power systems requiring robust fault containment.

FAQ

What is the primary function of the EV5094-J-00A?

The EV5094-J-00A is a dedicated evaluation board for the MP5094GJ dual-channel eFuse IC. Its purpose is to demonstrate real-time inrush limiting, overcurrent protection with hiccup mode, output overvoltage clamping, and thermal shutdown latch-off - all without software or configuration. It provides direct access to all critical pins and test points for oscilloscope validation.

Can the EV5094-J-00A be used with input voltages other than 12V and 5V?

No - the board is optimized for 12V (VIN1) and 5V (VIN2) operation only. The MP5094GJ's internal OVP thresholds (17V and 7V) and current limits are calibrated for these rails. Applying higher input voltages risks permanent damage to the IC or board components, as confirmed by the absolute maximum ratings in the MP5094 datasheet.

How is soft-start configured on this board?

Soft-start is implemented per channel using external capacitors connected to SS1 and SS2 pins. The slew rate of VOUT1 and VOUT2 is directly proportional to the capacitance value, enabling precise control of inrush current rise time. Default test configurations use no external capacitor unless specified in test conditions.

Does the board support independent enable control for each channel?

Yes - EN1 and EN2 pins are brought out to test points, allowing individual channel enable/disable via logic-level signals (0.7V threshold for ON, 1.05V for OFF). This enables verification of asymmetric power-up sequences and fault isolation between rails.

What protection features are validated in the test reports?

The included oscilloscope waveforms validate six key protections: (1) soft-start slew-rate control, (2) current-limit trip/hiccup recovery, (3) short-circuit response (<500μs), (4) OVP clamp action (10μs), (5) thermal shutdown latch-off, and (6) surge tolerance (100ms at 24V/16V). All tests were conducted at 25°C with defined load conditions.

Is the MP5094GJ IC soldered to the board replaceable?

No - the MP5094GJ is permanently mounted in a TSOT23-8 package and not socketed. The board is intended for functional evaluation, not IC substitution. Replacement requires rework with appropriate hot-air tools and adherence to MPS's recommended soldering profile for TSOT23 packages.