Monolithic Power Systems Inc. EV8758H-L-00A

Overview

EV8758H-L-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP8758HGL synchronous buck converter, delivering 10A continuous output at 1.2V from a 4.5–22V input, featuring 500kHz switching frequency, PFM/PWM mode selection, and hiccup-mode overcurrent protection. It supports fast transient response via constant-on-time control and integrates low-R_DS(ON) MOSFETs for high efficiency in compact power delivery.

For engineers reviewing the EV8758H-L-00A datasheet, EV8758H-L-00A pinout, EV8758H-L-00A application, or EV8758H-L-00A equivalent, this board enables rapid validation of MP8758HGL's performance under real load conditions-including startup/shutdown sequencing, output ripple (<50mV at 10A), thermal behavior, and OVP/OCP fault recovery-across laptop, tablet, and distributed power systems.

Technical Context

The EV8758H-L-00A implements the MP8758HGL IC in a fully assembled, tested layout with optimized power path routing, 1.2µH/25A inductor (Wurth 744325120), and low-ESR ceramic output capacitance (three 22µF X5R + one 1µF X7R). Input filtering uses dual 22µF/25V X7R caps and 0.1µF bypassing.

It supports both VIN- and EN-controlled startup/shutdown, offers adjustable output (0.604V–1.2V via R1/R2 divider), and includes internal soft-start, output discharge, auto-retry thermal shutdown, and overvoltage protection-verified across 4.5V, 12V, and 22V input conditions per test reports.

Key Specifications

Availability

EV8758H-L-00A is available at Aetrix Electronics and suitable for laptop computer power validation, tablet PC DC-DC design verification, and networking system point-of-load prototyping requiring stable component supply and pre-characterized thermal/mechanical performance.

Supply support for EV8758H-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 focus on energy-efficient DC-DC conversion, motor drivers, and LED lighting solutions.

This evaluation board belongs to MPS's EVB (Evaluation Board) product line, engineered to accelerate design-in of their MP8758HGL high-current buck converters into compute and consumer power applications.

FAQ

What input voltage range does the EV8758H-L-00A support?

The board accepts 4.5V to 22V DC input, matching the MP8758HGL's full operating range. Testing confirms stable 10A output across this span, including worst-case 4.5V start-up and 22V high-line efficiency points, with no derating required under recommended thermal conditions.

Can the output voltage be adjusted, and how?

Yes-output is set by resistor divider R1/R2 per the MP8758HGL feedback network. Default configuration yields 1.2V, but values can be recalculated using the device's 0.604V reference to achieve any voltage between 0.604V and 1.2V, as detailed in the MP8758HGL datasheet Application Information section.

Does the board include thermal protection and fault recovery?

Yes-it implements the MP8758HGL's auto-retry thermal shutdown and hiccup-mode overcurrent protection. Test waveforms show full recovery after thermal fault clearance and sustained short-circuit current limiting without latch-up, verified at 10A load and 22V input.

What are the key external components used on this board?

Core components include Wurth 744325120 (1.2µH, 25A saturation) inductor, three Murata GRM31CR61C226ME15L (22µF/16V X5R) output capacitors, one GRM188R71E105KA12D (1µF/25V X7R), and precision 1% resistors (RL0603FR series) for feedback and sensing networks.

How is enable functionality implemented?

The EN pin is routed to a test point and supports TTL-compatible logic: drive ≥2.0V to enable regulation, ≤0.4V to disable. Startup/shutdown waveforms confirm clean sequencing with no output overshoot or undershoot during EN-controlled transitions at 0A and 10A loads.

Is output voltage ripple characterized, and what are typical values?

Yes-ripple is measured at <20mV_pp (PFM, 0A load), <50mV_pp (PWM, 10A load), and <50mV_pp (PFM, 10A load), per test data on page 4 of the EV8758H-L-00A Rev. 1.0 document, using 50mV/div AC-coupled oscilloscope capture.

What mechanical dimensions and PCB layer count does the board use?

The board measures 8.55cm × 8.55cm × 1.6cm and uses a 4-layer stack-up (top signal, inner layer 1, inner layer 2, bottom signal), with dedicated power planes and thermal vias under the QFN3×4 MP8758HGL package to sustain 10A operation without exceeding 60°C case rise.