Monolithic Power Systems Inc. EV2324-J-00A

Overview

EV2324-J-00A from Monolithic Power Systems is a dedicated evaluation board for the MP2324GJ synchronous step-down converter IC, demonstrating a 2A, 3.3V output DC/DC conversion solution operating from 4.5–24V input at fixed 500kHz switching frequency with internal 120mΩ/50mΩ MOSFETs and power-good indicator functionality in a TSOT23-8 package.

For engineers reviewing the EV2324-J-00A datasheet, EV2324-J-00A pinout, EV2324-J-00A application, or EV2324-J-00A equivalent, this board enables rapid validation of MP2324GJ performance in notebook I/O power, digital set-top boxes, flat-panel TV/monitor supplies, and other compact 3.3V rail generation systems requiring thermal shutdown, OCP hiccup mode, and external frequency sync capability.

Technical Context

The EV2324-J-00A implements the MP2324GJ in current-mode control architecture, enabling fast transient response and stable loop compensation across 4.5–24V input range. It supports both enable/disable control and external clock synchronization (200kHz–2MHz) via the shared EN/SYNC pin.

Board-level design integrates 6.5μH power inductor (Wurth 744314650), 22μF/10V and 22μF/25V ceramic output capacitors, 0.1μF bypass caps, and precision feedback resistors (R1=40.2kΩ, R2=13kΩ) to deliver regulated 3.3V ±1% under 2A load with soft-start and power-good signaling.

Key Specifications

Availability

EV2324-J-00A is available at Aetrix Electronics and suitable for notebook I/O power, digital set-top box power, flat-panel television/monitor auxiliary supplies, and other embedded DC/DC validation requiring stable component supply, quick-turn prototyping, and production-ready reference design fidelity.

Supply support for EV2324-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 expertise in DC/DC converters, LED drivers, and motor drivers for consumer, computing, and industrial markets.

The MP2324 product line delivers compact, high-efficiency synchronous buck regulators targeting space-constrained applications needing robust thermal performance, light-load power-save mode, and flexible frequency control - optimized for 3.3V/2A rails in portable and display electronics.

FAQ

What input voltage range is supported on the EV2324-J-00A board?

The board accepts 4.5V to 24V DC input, matching the MP2324GJ's rated operating range. Testing per MPS documentation confirms stable 3.3V/2A output across this span, with thermal derating above 19V under full load due to conduction losses in the internal MOSFETs.

How is the output voltage set, and can it be adjusted?

Output is fixed at 3.3V using R1=40.2kΩ and R2=13kΩ in the feedback divider. The MP2324GJ supports adjustable outputs down to 0.8V; users may replace R1/R2 to configure alternate voltages while maintaining stability per the datasheet's compensation guidelines.

Does the board support external frequency synchronization?

Yes - the EN/SYNC pin accepts an external clock signal (200kHz–2MHz) to override the internal 500kHz oscillator. This allows EMI reduction via spread-spectrum alignment or system-level clock domain synchronization without hardware modification.

What protection features are implemented and how do they behave?

The board demonstrates MP2324GJ's over-current protection (OCP) in hiccup mode - latching off for ~300ms after trip, then retrying - and thermal shutdown at ~150°C junction temperature. Both are fully functional and observable on test waveforms in the official EVB report.

Is the power-good (PG) signal active-high or active-low, and what threshold triggers it?

PG is active-high open-drain output, asserted when VOUT reaches 90% of target (≥2.97V for 3.3V). It requires an external pull-up resistor (not populated by default); the schematic shows optional R9 (33kΩ) for TTL/CMOS interfacing in system monitoring circuits.

Can the board be used for continuous 2A operation, and what thermal considerations apply?

Yes - validated for 2A continuous output at 25°C ambient with VIN=12V. At higher input voltages (e.g., 24V), derating to ~1.5A is recommended unless board airflow or copper area is enhanced, as thermal imaging shows >85°C MOSFET case temperature under full load at elevated VIN.