Monolithic Power Systems Inc. EV2331H-TL-00A

Overview

EV2331H-TL-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2331H synchronous step-down converter, a 24V-input, 3.3V-output, 2A DC/DC regulator operating at 1.2MHz with constant-on-time control, integrated 110mΩ/45mΩ MOSFETs, and thermal shutdown protection. It supports pre-bias startup and programmable soft-start for stable power sequencing in compact consumer electronics.

For engineers reviewing the EV2331H-TL-00A datasheet, EV2331H-TL-00A pinout, EV2331H-TL-00A application, or EV2331H-TL-00A equivalent, this board enables rapid validation of MP2331H performance under 19V input, 3.3V/2A output, fast load transients, efficiency mapping, and PG/EN interface behavior in real PCB layouts.

Technical Context

The EV2331H-TL-00A implements the MP2331H IC in a functional reference design with verified 2.2µH power inductor (Sunlord WPL6530H2R2MT), 22µF/0805 input/output ceramic capacitors, and precision feedback resistors (R1=40.2kΩ, R2=13kΩ) setting VOUT=3.3V. Layout follows MPS-recommended thermal pad grounding and high-frequency routing practices.

Test data confirms operation across 19V input with ≤10mVpp output ripple at 2A, <1ms startup time via EN or VIN, hiccup-mode SCP response within 2ms, and >90% peak efficiency at 12V input. All measurements align with MP2331H's COT control loop stability and internal current-sense accuracy.

Key Specifications

Availability

EV2331H-TL-00A is available at Aetrix Electronics and suitable for power supply validation, DC/DC reference design verification, and MP2331H integration testing requiring stable component supply in game consoles, digital set-top boxes, flat-panel displays, and embedded industrial controllers.

Supply support for EV2331H-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP2331H product line delivers compact, high-efficiency DC/DC conversion for space-constrained consumer electronics, emphasizing low-RDS(ON) integration, fast transient response, and robust protection in SOT583 packaging.

FAQ

What input voltage range is validated on the EV2331H-TL-00A board?

The board is tested and documented for reliable operation from 19V input, consistent with the MP2331H's full 4.2V–24V specification. Test reports confirm stable 3.3V/2A output, <10mVpp ripple, and thermal shutdown margin at 19V with 2.2µH inductor and specified capacitor stack.

Can the output voltage be adjusted to 5V or other values?

Yes - the feedback resistor network (R1=40.2kΩ, R2=13kΩ) sets 3.3V, but replacing R1/R2 per MP2331H's VOUT = 0.8V × (1 + R1/R2) equation enables other outputs. The board includes solder pads for alternative resistors and maintains layout integrity for up to 5V with appropriate capacitor derating.

Does the board include the MP2331H IC pre-soldered?

Yes - U1 is the MP2331HGTL in SOT583 package, fully assembled and verified per Bill of Materials. Thermal pad is soldered to PCB ground plane per MPS layout guidelines, ensuring proper heat dissipation during 2A continuous operation.

How is Power Good (PG) functionality implemented and tested?

PG is an open-drain output requiring external 3.3V pull-up (R8=100kΩ). Test reports show clean assertion within 1ms of valid VOUT and deassertion during undervoltage or shutdown. PG timing matches MP2331H's internal 10% VOUT tolerance window and hysteresis.

What load transient performance is demonstrated?

The board achieves <±30mV output deviation during 1A→2A load steps at 2.5A/µs slew rate, measured with 100µs/div oscilloscope capture. This validates MP2331H's constant-on-time control loop speed and output capacitor selection (22µF ×2 parallel) for dynamic CPU/GPU core rail applications.

Is pre-bias startup supported and verified?

Yes - test waveforms confirm successful startup into pre-biased 3.3V output without reverse current or oscillation. The MP2331H's internal circuitry actively controls high-side MOSFET gate drive during pre-bias conditions, as confirmed in startup-through-VIN tests at 0A and 2A loads.