Monolithic Power Systems Inc. EV8795H-LE-00A

Overview

EV8795H-LE-00A from Monolithic Power Systems is an evaluation board for the MP8795H synchronous step-down converter, delivering 20A continuous output at 1V from 8–16V input. It implements adaptive constant-on-time (COT) control, supports remote voltage sensing, and features programmable soft-start (1ms), selectable 600/800/1000kHz switching frequency, and PGOOD with active-clamped low-level during power failure.

For engineers reviewing the EV8795H-LE-00A datasheet, EV8795H-LE-00A pinout, EV8795H-LE-00A application, or EV8795H-LE-00A equivalent, this board enables rapid validation of high-current, low-voltage DC/DC conversion in space-constrained industrial and networking power systems - especially where fast transient response, pre-bias startup, and forced-CCM operation are required.

Technical Context

The EV8795H-LE-00A implements a complete reference design around the MP8795H QFN3×4mm IC, integrating low-R_DS(ON) MOSFETs, differential remote sense circuitry, and adaptive COT control to achieve ultrafast load-step response without external compensation. Input bias options support operation down to 2.7V with external 3.3V VCC.

It provides configurable protection including non-latch OCP, OVP, UVP, UVLO, and thermal shutdown, plus output discharge and voltage tracking. The board uses six 47μF/6.3V X5R 0805 ceramic output capacitors and a 0.4μH shielded 10×10mm inductor to sustain 20A continuous current with stable regulation across line and load.

Key Specifications

Availability

EV8795H-LE-00A is available at Aetrix Electronics and suitable for flat-panel TV power rails, optical module bias supplies, enterprise router PoE subsystems, and multi-function printer mainboard DC/DC validation requiring stable component supply and repeatable lab characterization.

Supply support for EV8795H-LE-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The EV8795H-LE-00A belongs to MPS's evaluation board product line, designed specifically to accelerate adoption of their monolithic high-current buck converters in infrastructure and computing applications demanding compact, efficient, and robust power delivery.

FAQ

What input voltage range is supported on the EV8795H-LE-00A?

The board operates from 8V to 16V by default, limited by the EN resistor divider (R4/R6). With external 3.3V bias or EN overdrive, input can be reduced to 2.7V. Minimum VIN is not fixed - it depends on how EN is driven and whether internal or external VCC bias is used per the MP8795H datasheet.

How is output voltage set and adjusted?

VOUT is set via resistive divider R1 (3.4kΩ) and R2 (4.99kΩ) to deliver 1V (VFB = 0.6V). To change output, replace R1/R2 per the formula VOUT = 0.6V × (1 + R1/R2); values must maintain ≥1mA divider current and respect max 5.5V limit. Full guidance is in the MP8795H datasheet Application Information section.

Does the board support pre-bias startup and forced-CCM operation?

Yes - both are enabled by the MP8795H IC and implemented on the EV8795H-LE-00A. Pre-bias startup allows safe turn-on when output capacitor is pre-charged; forced-CCM ensures continuous conduction mode across full load range, eliminating audible noise and improving light-load regulation.

What is the purpose of the JP1 jumper?

JP1 selects the switching frequency: position 1–2 = 600kHz, 2–3 = 800kHz, 3–4 = 1000kHz. This changes the timing resistor network connected to the RT pin of U1 (MP8795HGLE), allowing trade-offs between efficiency (lower f_SW) and component size (higher f_SW).

Can the board be used for remote voltage sensing?

Yes - the board includes dedicated VOS+ and VOS− pads routed directly to the MP8795H's differential remote sense inputs. This compensates for PCB trace IR drop, ensuring accurate 1V regulation at the load point under 20A load conditions.

Is PGOOD functional and how is it configured?

PGOOD is active-low and clamped to ~0.3V during input failure or undervoltage lockout. It is routed to test point TP3 and can drive external logic or sequencing controllers. Its threshold is factory-trimmed and not user-adjustable; behavior matches MP8795H's internal comparator with built-in hysteresis.