Monolithic Power Systems Inc. EVL2328-TL-00A

Overview

EVL2328-TL-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2328GTL synchronous step-down converter, delivering 5 V at up to 2 A from a 6.5–28 V input. It integrates an optimized 10 µH power inductor (MPL-AL6060-100), supports constant-on-time control, and achieves >92% efficiency at 24 V_IN/5 V_OUT/2 A. The board enables rapid validation of buck converter performance in consumer power applications.

For engineers reviewing the EVL2328-TL-00A datasheet, EVL2328-TL-00A pinout, EVL2328-TL-00A application, or EVL2328-TL-00A equivalent, this board provides verified test data for efficiency vs. load current, startup/shutdown timing, load transient response, thermal rise, and protection behavior - all under real-world conditions with the MP2328GTL in SOT583.

Technical Context

The EVL2328-TL-00A implements a complete 430 kHz synchronous buck topology using the MP2328GTL IC, which integrates 115 mΩ high-side and 55 mΩ low-side MOSFETs. Its constant-on-time (COT) control architecture delivers fast transient response and eliminates loop compensation components.

Board-level design includes an MPS-optimized 10 µH shielded inductor (DCR = 24 mΩ, I_SAT = 6.6 A), input/output ceramic filtering (10 µF/22 µF X5R/X7S), and precision feedback resistors (R1 = 90.9 kΩ, R2 = 10 kΩ) setting V_OUT = 5 V with 0.5 V reference. Power Good (PG) and Enable (EN) signals are brought out for system-level integration testing.

Key Specifications

Availability

EVL2328-TL-00A is available at Aetrix Electronics and suitable for power supply validation, DC-DC converter qualification, and embedded system bring-up requiring stable component supply, repeatable test conditions, and manufacturer-verified reference performance.

Supply support for EVL2328-TL-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 power management ICs, with expertise in integrated DC-DC converters, LED drivers, and motor drivers since 1997.

The EVL2328-TL-00A belongs to MPS's evaluation board product line, engineered to accelerate design-in of the MP2328GTL buck converter for space-constrained, high-efficiency 5 V rail generation in consumer electronics.

FAQ

What is the default output voltage, and how is it set?

The EVL2328-TL-00A is factory-configured for 5 V output using R1 = 90.9 kΩ and R2 = 10 kΩ, leveraging the MP2328GTL's 0.5 V internal feedback reference. The formula V_OUT = 0.5 × (1 + R1/R2) confirms this setting. Users may reconfigure V_OUT by replacing these resistors while maintaining <1% tolerance.

Does the board support enable and power-good monitoring?

Yes - the EN pin accepts 1.3–6 V logic-high to activate regulation and <1 V to disable; PG pin asserts high when V_OUT is within ±5% of target. Both signals are routed to test points and labeled on silkscreen for oscilloscope probing and system-level interface validation.

What inductor is used, and why is it critical?

The board uses MPS's MPL-AL6060-100: a 10 µH, shielded, low-DCR (24 mΩ) inductor rated for 6.6 A saturation current. Its low loss and high saturation ensure stable 2 A operation without core saturation or excessive temperature rise under peak load.

How is thermal performance validated on this board?

Case temperature rise is measured directly on the MP2328GTL's exposed pad under 25 °C ambient. Data shows ≤30 °C rise at 2 A/24 V_IN, confirming adequate copper pour and thermal vias in the 6.35 cm × 6.35 cm PCB layout - no heatsink required for nominal operation.

Can this board be used for input voltages below 6.5 V?

No - the MP2328GTL has a minimum operating input voltage of 6.5 V per its datasheet. Attempting operation below this threshold results in dropout, regulation failure, or uncontrolled shutdown. Input must remain ≥6.5 V for guaranteed functionality.

Are all protection features tested and observable?

Yes - the board documentation includes oscilloscope waveforms for short-circuit protection (SCP) entry/recovery, overcurrent hiccup mode, thermal shutdown, and undervoltage lockout (UVP). All protections are active and verified across input/load/temperature conditions.