Monolithic Power Systems Inc. EV3212DQ-00A

Overview

EV3212DQ-00A from Monolithic Power Systems is an evaluation board for the MP3212DQ, a 1.3A, 1MHz fixed-frequency current-mode step-up DC/DC converter in a 10-pin QFN package. It operates from 2.3V–5.5V input, delivers up to 28V/100mA output, and features PFM mode for micropower efficiency in low-load OLED biasing and LCD supply applications.

For engineers reviewing the EV3212DQ-00A datasheet, EV3212DQ-00A pinout, EV3212DQ-00A application, or EV3212DQ-00A equivalent, this board enables rapid validation of MP3212DQ's startup behavior, load regulation, efficiency curves (e.g., >85% at 100mA with VIN=3.6V), output voltage adjustability via R2, and protection features including UVLO, OVP, current limit, and thermal shutdown.

Technical Context

The EV3212DQ-00A implements a non-isolated boost topology using the MP3212DQ IC, which integrates a 1.3A MOSFET switch, internal compensation, and reference voltage (V_FB = 1.24V). Its fixed 1MHz switching frequency minimizes external component size while supporting ceramic output capacitors.

It supports input-output disconnect via CN1 jumper removal, enabling system-level power sequencing control. Protection functions-under-voltage lockout (UVLO), output over-voltage protection (OVP), cycle-by-cycle current limiting, and thermal overload shutdown-are fully implemented on the board with no external components required.

Key Specifications

Availability

EV3212DQ-00A is available at Aetrix Electronics and suitable for OLED display biasing, LCD panel supply design, and white LED driver prototyping requiring stable component supply, fast turnaround evaluation, and validated reference layout.

Supply support for EV3212DQ-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 core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP3212 product line targets ultra-low-power portable electronics, delivering micropower boost conversion with integrated protection and minimal external components for space-constrained display and imaging systems.

FAQ

What is the default output voltage of the EV3212DQ-00A board?

The board is preset to 18V output using R1 = 10kΩ and R2 = 133kΩ, calculated per V_OUT = V_FB × (1 + R2/R1) where V_FB = 1.24V. This setting meets typical OLED gate bias requirements and can be reconfigured by replacing R2 with a standard 1% resistor.

How do I disable the MP3212DQ on the evaluation board?

The MP3212DQ is enabled by default when VIN is applied. To disable it, remove the short jumper from CN1 - this opens the SHDN signal path, forcing the IC into shutdown mode with near-zero quiescent current (≤1µA).

Which inductor is used on the EV3212DQ-00A board and why?

L1 is a TOKO B1015AS-100M: 10µH, 2.7A DC saturation current, 71mΩ DCR. Its high saturation current accommodates the MP3212DQ's 1.3A switch limit and 1MHz operation, minimizing ripple and thermal rise under full 100mA load.

Does the board include output over-voltage protection?

Yes - the MP3212DQ IC provides internal output over-voltage protection (OVP) that clamps VOUT if feedback loss or resistor divider fault causes regulation failure. The board routes FB directly to the IC, preserving this function without external circuitry.

Can the EV3212DQ-00A drive white LEDs directly?

No - it is a constant-voltage boost converter, not a constant-current LED driver. However, it can power external LED driver ICs or discrete current sources (e.g., op-amp + MOSFET) requiring 18–28V bias rails, as verified in digital still camera flash circuits.

Is thermal performance validated on this board?

Yes - the MP3212DQ's thermal overload protection is active and tested. Layout includes EP pad connection to ground plane, and efficiency data (Figure 1) confirms ≤55°C junction rise at 100mA/3.6V input under natural convection, per MPS Rev. 1.0 test conditions.