Monolithic Power Systems Inc. EV2171-J-00A

Overview

EV2171-J-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MPQ2171GJ synchronous step-down converter - a 1A, 2.6MHz, constant-on-time DC/DC regulator in TSOT23-8 packaging, supporting 2.5–5.5V input and regulated 1.2V output for Li+-powered portable and automotive infotainment systems.

For engineers reviewing the EV2171-J-00A datasheet, EV2171-J-00A pinout, EV2171-J-00A application, or EV2171-J-00A equivalent, this board enables rapid validation of MPQ2171GJ's fast transient response, hiccup-mode short-circuit protection, EN/PG sequencing, and ceramic-capacitor stability under real-world load and line conditions.

Technical Context

The EV2171-J-00A implements the MPQ2171GJ IC with integrated 90mΩ high-side and 50mΩ low-side MOSFETs, operating at a default 2.6MHz switching frequency with 3.3V input and 1.8V output. Its constant-on-time (COT) control architecture delivers sub-10μs load-step response without external compensation.

Board-level design includes a 1μH power inductor (TDK RLF7030-1R0N6R4), 22μF X5R ceramic output capacitor (muRata GRM218R70J226KE76L), and precision 41.2kΩ/41.2kΩ feedback divider for 1.2V regulation - all optimized for low ESR stability and thermal performance up to 1A continuous load.

Key Specifications

Availability

EV2171-J-00A is available at Aetrix Electronics and suitable for automotive infotainment development, battery-powered handheld system prototyping, and low-voltage I/O power validation requiring stable component supply and full reference design traceability.

Supply support for EV2171-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 semiconductor company specializing in high-performance analog and power ICs, with over two decades of innovation in DC/DC conversion, motor drivers, and LED lighting controllers.

The EV2171-J-00A belongs to MPS's evaluation board product line, engineered specifically to accelerate adoption of their MPQ2171 series for AEC-Q100 Grade 1 automotive applications and space-constrained portable electronics.

FAQ

What input voltage range is supported by the EV2171-J-00A?

The board supports 2.5V to 5.5V DC input, aligned with the MPQ2171GJ's operational range. It is validated with 3.3V and 5V sources, and maintains regulation across the full span - including the lower end typical of deeply discharged Li+ cells.

How is the output voltage set on this evaluation board?

VOUT is set via an external resistor divider (R1 = 41.2kΩ, R2 = 41.2kΩ) connected to the FB pin, yielding 1.2V. The board includes test points and solder jumpers to reconfigure R2 for other outputs (e.g., 1.0V, 1.8V, 3.3V) using the formula VOUT = 0.6V × (1 + R1/R2).

Does the EV2171-J-00A include power-good (PG) and enable (EN) functionality?

Yes - the board exposes dedicated EN and PG pins with 1.0mm golden-pin headers. EN accepts 0–0.4V (off) or >1.2V (on); PG asserts high after soft-start completion and drops low during faults like overcurrent or thermal shutdown.

Can the EV2171-J-00A be used for AEC-Q100 Grade 1 qualification support?

Yes - the MPQ2171GJ IC on this board is qualified to AEC-Q100 Grade 1 (−40°C to +125°C junction), and the board layout follows automotive-grade layout practices, including thermal relief pads, controlled impedance routing, and robust grounding for EMC validation.

What inductor and output capacitor are populated on the board?

The board uses a 1μH, 6.4A-rated TDK RLF7030-1R0N6R4 power inductor and a 22μF, 6.3V X5R ceramic capacitor (muRata GRM218R70J226KE76L). Both are low-ESR, high-frequency optimized components that ensure stability without external compensation.

Is there thermal performance data available for sustained 1A operation?

Yes - test reports show ≤10°C case temperature rise above ambient at 1A, 25°C, VIN=3.3V, VOUT=1.2V. Board-level copper pour and thermal vias under U1 enhance heat dissipation, enabling continuous operation without forced airflow.