Monolithic Power Systems Inc. EV20051-N-00A

Overview

EV20051-N-00A from Monolithic Power Systems is an evaluation board for the MP20051 low-noise, high-PSRR, 1A adjustable-output LDO regulator. It supports 2.5V–5.5V input, delivers up to 1A at user-configurable output (0.8V–5V), and features 13μVRMS noise, 63dB PSRR at 1kHz, and thermal/current protection - deployed in battery-powered handheld instruments and cellular phone power rails.

For engineers reviewing the EV20051-N-00A datasheet, EV20051-N-00A pinout, EV20051-N-00A application, or EV20051-N-00A equivalent, this board enables rapid validation of MP20051's transient response, dropout behavior under load, and noise-sensitive analog supply performance in portable electronics designs.

Technical Context

The EV20051-N-00A implements the MP20051 SOIC-8E LDO with external feedback resistors (R1=3.75kΩ, R2=10kΩ) setting a default 1.1V output. It uses ceramic input/output capacitors (C1=2.2μF, C2=4.7μF, X7R/X5R, 0805) and includes enable control (VEN threshold: 0.4V disable / 1.5V–5.5V enable) for system-level power sequencing.

Board layout follows MPS reference design guidelines: compact 2.5"×2.5" footprint, top/bottom copper pours for thermal management, and silk-screened test points for VIN, VOUT, EN, GND, and FB - supporting direct oscilloscope probing of regulation stability and load-step response.

Key Specifications

Availability

EV20051-N-00A is available at Aetrix Electronics and suitable for notebook computers, cellular phones, and handheld instrumentation requiring stable component supply and fast-turn evaluation of ultra-low-noise LDO performance.

Supply support for EV20051-N-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 expertise in DC/DC converters, LDOs, motor drivers, and LED drivers.

The MP20051 product line targets noise-sensitive portable applications, delivering high PSRR and ultralow output noise in compact SOIC-8E packages for space-constrained battery-powered systems.

FAQ

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

The default output voltage is 1.1V, set by the onboard resistor divider (R1 = 3.75kΩ, R2 = 10kΩ) per the MP20051's 0.8V feedback reference. This configuration satisfies common low-voltage MCU core rail requirements while maintaining adequate headroom across the input range.

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

Yes - the output is fully adjustable from 0.8V to 5V using the external feedback resistors. Replace R1 according to VOUT = 0.8V × (1 + R1/R2); R2 remains fixed at 10kΩ. The board accommodates standard 0603 resistors and provides unpopulated pads for alternate values.

Does the board include input and output capacitance matching MP20051 recommendations?

Yes - it uses C1 = 2.2μF (X7R, 16V, 0805) on the input and C2 = 4.7μF (X5R, 10V, 0805) on the output, both meeting MP20051's stability and ESR requirements. No additional capacitance is needed for basic operation.

How is enable functionality implemented on the EV20051-N-00A?

The EN pin is routed to a test point and accepts 0–5.5V logic. Applying VEN < 0.4V disables the LDO; VEN ≥ 1.5V enables it. A 100kΩ pull-up to VIN is recommended for automatic startup, and the board includes a footprint for that resistor (R3).

Is thermal performance validated on this evaluation board?

Yes - the SOIC-8E package is mounted on a 2-layer PCB with internal copper pours connected to GND and thermal pads. At 1A load and 5.5V input, the board sustains regulated output without thermal shutdown, confirming MP20051's internal overtemperature protection operates as specified.

What are the physical dimensions and mounting options?

The board measures 2.5" × 2.5" × 0.4" (6.35cm × 6.35cm × 1.1cm) with four 3.2mm mounting holes at corners. It has no standoffs included but supports M3 screws for secure bench testing or integration into larger mechanical assemblies.