Monolithic Power Systems Inc. EV2148-QD-00B

Overview

EV2148-QD-00B from Monolithic Power Systems is a 1A synchronous step-down DC/DC converter evaluation board based on the MP2148GQD IC, featuring 11µA quiescent current, 2.2MHz switching frequency, and operation from 2.3V–5.5V input to deliver fixed 1.2V output. It implements Constant-On-Time control for fast transient response and integrates cycle-by-cycle current limiting and thermal shutdown in a QFN-6 (1.0mm×1.5mm) package.

For engineers reviewing the EV2148-QD-00B datasheet, EV2148-QD-00B pinout, EV2148-QD-00B application, or EV2148-QD-00B equivalent, this board enables rapid validation of MP2148GQD performance in ultra-low-power portable systems, battery-powered I/O rails, and space-constrained wireless modules where compact layout, low IQ, and stable 1.2V/1A regulation are critical.

Technical Context

The EV2148-QD-00B is a hardware reference platform-not an IC-designed to demonstrate the MP2148GQD's fixed-output configuration with power-good signaling. It uses a 1.0µH shielded inductor (PIFE25201B-1R0MS), dual 10µF X5R ceramic output/input capacitors (GRM21BR61A106KE19L), and precision 200kΩ feedback resistors to set VOUT = 1.2V per R1/R2 = 200kΩ/200kΩ.

Test conditions confirm steady-state operation at VIN = 5V, VOUT = 1.2V, IOUT = 1A, TA = +25°C, with <10mV peak-to-peak output ripple and <20µs load-step response. The board supports AAM (Auto-Audio Mode) for light-load efficiency and includes EN-controlled startup sequencing.

Key Specifications

Availability

EV2148-QD-00B is available at Aetrix Electronics and suitable for portable device power validation, wireless module reference design, and low-voltage I/O rail qualification requiring stable component supply and documented test waveforms under real operating conditions.

Supply support for EV2148-QD-00B 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 over two decades of innovation in DC/DC conversion, motor drivers, and LED controllers.

The MP2148 product line targets ultra-compact, ultra-low-IQ power management for battery-critical applications-designed specifically for space- and energy-constrained portable electronics where 1x1.5mm footprint and sub-15µA IQ are mandatory.

FAQ

What is the purpose of the EV2148-QD-00B evaluation board?

The EV2148-QD-00B is a fully assembled, tested reference design board that demonstrates the MP2148GQD's fixed 1.2V output capability, including power-good signaling, thermal behavior, and transient response. It is not a production component but a validation tool for system-level integration and layout verification.

Can the output voltage be adjusted on this board?

No-the EV2148-QD-00B is configured for fixed 1.2V output using factory-set 200kΩ resistors. Adjustable versions require the MP2148GQD-XX series with different R1/R2 values or the adjustable MP2148GQD IC with external feedback network.

Does this board include input/output capacitors and inductor?

Yes-it includes two 10µF/10V X5R ceramic capacitors (GRM21BR61A106KE19L) for input and output filtering, and one 1.0µH/3.8A saturation current shielded inductor (PIFE25201B-1R0MS), all placed per MPS recommended layout guidelines.

What test data is provided with the EV2148-QD-00B documentation?

The Rev.1.1 datasheet includes oscilloscope waveforms for startup/shutdown (with/without load), steady-state ripple (<10mV p-p), load-step response (<20µs), and efficiency curves across 0.05A–1A at VIN = 3.6V and 5V, all captured at +25°C with specified external components.

Is the EN pin accessible and functional on this board?

Yes-the EN pin is routed to a test point and supports logic-level enable/disable sequencing. Pulling EN low disables switching and reduces total board current to <1µA, enabling precise power domain control in multi-rail systems.

How does the Power-Good (PG) signal behave during undervoltage or fault conditions?

The PG pin goes low when VOUT drops below 1.11V (–7.5%) or rises above 1.29V (+7.5%), and remains low during thermal shutdown or overcurrent hiccup events. Its open-drain output requires an external pull-up resistor (not populated by default).