Monolithic Power Systems Inc. EV20051-Q-00A

Overview

EV20051-Q-00A from Monolithic Power Systems is an evaluation board for the MP20051 low-noise, high-PSRR, 1A linear regulator IC. It demonstrates adjustable output (0.8V–5V), 110μA ground current, 63dB PSRR at 1kHz, and 13μVRMS output noise - optimized for powering noise-sensitive analog circuitry in portable electronics.

For engineers reviewing the EV20051-Q-00A datasheet, EV20051-Q-00A pinout, EV20051-Q-00A application, or EV20051-Q-00A equivalent, this board enables rapid validation of MP20051's transient response, dropout behavior (140mV @ 1A), thermal protection, and external feedback configuration under real load conditions.

Technical Context

The EV20051-Q-00A implements the MP20051DQ QFN-8 (3mm × 3mm) LDO regulator with internal PMOS pass device, supporting input voltage range 2.5V–5.5V and delivering up to 1A output current with current limiting and over-temperature shutdown.

Output voltage is set externally via resistor divider (R1/R2), with VFB = 0.8V reference; default configuration yields 1.1V output. The board includes 2.2μF (C1) and 4.7μF (C2) X5R ceramic capacitors in 0603 package for input/output filtering per MPS layout guidelines.

Key Specifications

Availability

EV20051-Q-00A is available at Aetrix Electronics and suitable for notebook computers, cellular phones, and hand-held instruments requiring stable component supply, quick-turn LDO characterization, and low-noise power validation.

Supply support for EV20051-Q-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, motor drive, and sensing applications.

The MP20051 product line targets battery-powered and noise-critical systems, delivering ultra-low noise and high PSRR in small-footprint LDOs for powering RF transceivers, precision ADCs, and PLLs.

FAQ

What is the default output voltage of the EV20051-Q-00A?

The default output voltage is 1.1V, set by a 3.75kΩ (R1) and 10kΩ (R2) resistor divider with the MP20051's 0.8V internal feedback reference. This configuration follows the formula VOUT = VFB × (1 + R1/R2) and is verified in the board's Rev. 1.1 schematic and Quick Start Guide.

Can the EV20051-Q-00A be used to evaluate different output voltages?

Yes - the output voltage is fully adjustable from 0.8V to 5V by changing R1 while keeping R2 = 10kΩ. The board accommodates standard 0603 resistors, and the calculation method is documented in the Quick Start Guide with example derivations for target voltages.

Does the board include input and output capacitors?

Yes - it includes a 2.2μF X5R ceramic capacitor (C1, 0603, 10V) at the input and a 4.7μF X5R ceramic capacitor (C2, 0603, 10V) at the output, both selected per MP20051's stability and transient response requirements as specified in the datasheet.

How is enable functionality implemented on this evaluation board?

The EN pin is brought out to a test point and accepts 1.5V–5.5V for activation or <0.4V for shutdown. A 100kΩ pull-up to VIN is recommended for automatic startup, and the board layout provides routing space for such a resistor if needed.

Is thermal performance characterized on this board?

Yes - the board supports 1A continuous load with validated thermal behavior under the MP20051DQ's over-temperature protection. Layout uses exposed pad soldering and 2-layer copper, consistent with MPS' thermal design recommendations for QFN-8 packages.