Monolithic Power Systems Inc. EV6004-Q-00B

Overview

EV6004-Q-00B from Monolithic Power Systems is an evaluation board designed to demonstrate the MP6004 monolithic 80V-input buck converter IC, featuring an integrated 180V power MOSFET, fixed peak-current control, discontinuous conduction mode (DCM), 12V/1A regulated output, and over-load/thermal protection - validated for PoE-powered security cameras and VoIP phones.

For engineers reviewing the EV6004-Q-00B datasheet, EV6004-Q-00B pinout, EV6004-Q-00B application, or EV6004-Q-00B equivalent, this board provides hands-on validation of MP6004's 36–80V input range, 12V output regulation, programmable 2.5A peak current limit, efficiency curves across VIN, and EN-controlled startup/shutdown sequencing.

Technical Context

The EV6004-Q-00B implements a non-isolated buck topology using the MP6004 IC in fixed peak-current, variable-frequency DCM operation - enabling stable 12V output across 36–80V input with minimal external components. It incorporates internal VCC generation from VIN, enabling self-biasing without auxiliary winding.

Board-level design includes discrete input/output filtering (2.2µF + 47µF at VIN; 22µF + 100µF at VOUT), 22µH power inductor with 3A saturation current, and precision feedback resistors (49.9kΩ/100kΩ) setting VOUT = 12V. Protection features - OLP and thermal shutdown - are directly implemented via MP6004's internal circuitry and verified in test waveforms.

Key Specifications

Availability

EV6004-Q-00B is available at Aetrix Electronics and suitable for PoE-powered security camera systems, VoIP telephony hardware, and WLAN access point development requiring stable component supply, rapid prototyping validation, and reference design traceability.

Supply support for EV6004-Q-00B 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 semiconductor company specializing in high-performance power management ICs, with core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.

The MP6004 product line targets cost-sensitive, space-constrained PoE-powered endpoints where isolation is unnecessary - delivering integrated high-voltage switching, compact QFN packaging, and robust protection in single-chip buck solutions.

FAQ

What input voltage range is supported, and how is overvoltage handled?

The EV6004-Q-00B accepts 36–80V DC input, matching IEEE 802.3at PoE+ specifications. The MP6004 IC integrates an 180V-rated power MOSFET and internal clamp circuitry; no external TVS is required for transient suppression within this range. Input capacitors (2.2µF ceramic + 47µF electrolytic) provide bulk energy storage and high-frequency decoupling.

Can output voltage be adjusted, and what components define it?

Yes, VOUT is adjustable via the FB1/FB2 resistor divider network. Default 12V is set by R4 = 100kΩ (FB2) and R5 = 49.9kΩ (FB1). Changing either resistor alters the feedback ratio per VOUT = 0.8V × (1 + R4/R5); the 0.8V reference is internal to MP6004. Layout accommodates 0603 footprints for easy rework.

Does the board support remote sensing or output current monitoring?

No - the EV6004-Q-00B uses local sensing only: FB pins connect directly to VOUT and GND. There is no dedicated current-sense resistor or ILIM monitor output. Peak current limit is set internally (2.5A default) and trimmed via external ILIM resistor (R1 = 107kΩ), but real-time current measurement is not provided on this board.

How is thermal performance validated, and what is the maximum ambient temperature?

Thermal shutdown is implemented via MP6004's internal sensor and verified in test reports (Rev. 1.01, p.3). At 1A load and 48V input, case temperature rise is ≤25°C above ambient. Board operates continuously up to +70°C ambient with natural convection; forced air extends usable range. Thermal pad of QFN-14 U1 is soldered to 4-layer internal copper pour for heat spreading.

Is isolation between input and output grounds required or supported?

No isolation is provided or intended - VIN GND and VOUT GND are separate nets on the board but share a common ground plane. The schematic shows distinct GND labels (GND for VIN side, VOGND for VOUT side), yet both connect to the same low-impedance ground plane. This reflects MP6004's non-isolated buck architecture; isolation requires external flyback or SEPIC design.

What documentation and layout files are included with the board?

The official EV6004-Q-00B Rev. 1.01 user guide includes full schematic (p.2), BOM (p.2), test data (efficiency, regulation, waveforms), PCB layer drawings (top/bottom silk & copper), and quick-start procedure. Gerber files are not publicly distributed; layout details are visible in Figures 1–3 of the document.