Monolithic Power Systems Inc. EV2348-TL-00A

Overview

EV2348-TL-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP2348 synchronous step-down converter IC, demonstrating 4A continuous output at 3.3V from a 19V input with 650kHz switching, COT control, and integrated 75mΩ/40mΩ MOSFETs in SOT583 packaging. It supports forced PWM, auto-PFM/PWM, and ultrasonic mode selection for noise-sensitive applications such as game consoles and flat-panel displays.

For engineers reviewing the EV2348-TL-00A datasheet, EV2348-TL-00A pinout (via MP2348 IC), EV2348-TL-00A application circuit implementation, or EV2348-TL-00A equivalent evaluation platforms, this board provides validated layout, BOM, thermal performance, and transient response data under real operating conditions including startup, shutdown, load steps, and short-circuit recovery.

Technical Context

The EV2348-TL-00A implements the MP2348's constant-on-time (COT) control architecture to deliver fast transient response (<100μs settling time under 2A→4A load step) and tight output regulation (±1% over line/load/temperature). Its PCB layout integrates optimized power loop routing, thermal vias under the SOT583 IC, and low-ESR ceramic output capacitors (2×22μF X5R + 1μF X7R) to sustain 4A DC current with <20mVpp output ripple at full load.

It validates key MP2348 features including pre-biased start-up, programmable soft-start via external capacitor (C4 = 6.8nF → ~2ms), EN-controlled enable/disable with 1.3V turn-on threshold, and hiccup-mode OCP triggered by internal current-sense amplifier monitoring high-side MOSFET conduction time. Protection functions are verified across VIN = 5–24V input range.

Key Specifications

Availability

EV2348-TL-00A is available at Aetrix Electronics and suitable for power supply validation, embedded system bring-up, and industrial DC-DC qualification requiring stable component supply, repeatable test conditions, and documented thermal/mechanical reference design.

Supply support for EV2348-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 core expertise in DC-DC conversion, LED drivers, and motor control solutions since 1997.

The MP2348 product line targets space-constrained, high-efficiency point-of-load applications in consumer electronics and computing, delivering integrated power stages and COT control in ultra-small packages like SOT583.

FAQ

What input voltage range is validated on the EV2348-TL-00A?

The board is tested and characterized across 5V to 24V input, with full 4A output capability confirmed at 12V, 19V, and 24V. Minimum operational input is 4.2V per MP2348 specification; below that, UVLO prevents startup. Input ripple and transient behavior are documented in Figures 6–9 of the revision 1.0 user guide.

Can the output voltage be adjusted, and how?

Yes - VOUT is set by the FB resistor divider (R2 and R5). Replacing R5 (604kΩ) with another value recalculates VOUT using VOUT = 0.8V × (1 + R5/R2). The board includes test points for FB node access and provisions for alternate resistors; no solder mask removal or PCB modification is required.

Does the board support remote sensing or differential feedback?

No - the EV2348-TL-00A uses single-point feedback via the FB pin connected directly to the VOUT net. It does not implement Kelvin sensing traces or dedicated sense lines; output regulation accuracy reflects local PCB drop only, not remote load point variation.

How is thermal performance validated on this board?

Thermal imaging and thermocouple measurements confirm ≤65°C junction rise at 4A/3.3V/19V input with 200LFM airflow. The SOT583 IC's exposed thermal pad is soldered to a 12mm² internal copper pour with 8×0.3mm thermal vias, matching MPS layout guidelines for 4A operation.

Is the EN pin accessible and what logic levels activate it?

Yes - EN is routed to a 0.1" pitch header (JP1 pin 2). Driving EN ≥1.3V (e.g., 3.3V or 5V logic) enables regulation; driving EN ≤1.0V disables output. Startup delay is ~2ms (set by C4), and shutdown is immediate with no reverse-current protection during disable.

Are all BOM components included, or are some "No-Stock" (NS)?

The shipped board includes all populated components except C1B and C6 (marked NS in BOM), which are unpopulated footprints for optional input filtering or noise suppression. All active components - including MP2348GTL, L1, C1/C2/C2A/C3/C4/C5, and all resistors - are installed and tested.