Monolithic Power Systems Inc. EV20046DQ-00A

Overview

EV20046DQ-00A from Monolithic Power Systems is an evaluation board for the MP20046DQ low-noise, high-PSRR linear regulator, configured for 3.3V/2A output with fast transient response, 70dB PSRR at 100Hz, and 17μVRMS output noise. It demonstrates power-good signaling, thermal shutdown, and current limiting in telecom and FPGA supply applications.

For engineers reviewing the EV20046DQ-00A datasheet, EV20046DQ-00A pinout, EV20046DQ-00A application, or EV20046DQ-00A equivalent, this board enables rapid validation of MP20046DQ performance under real load transients, dropout behavior at 210mV, and low-quiescent-current operation (75μA active, 1μA disabled) in battery-sensitive and high-reliability power domains.

Technical Context

The EV20046DQ-00A implements a fixed 3.3V output configuration using the MP20046DQ QFN10 (3×3 mm) LDO, which integrates a PMOS pass element, internal voltage reference, and open-drain power-good (/PG) output. Input range is strictly 4.3–5.5V per board design, matching the IC's 2.7–5.5V capability but constrained by layout and BOM selection.

Board-level features include 10μF/16V X5R input capacitance (C1), 47μF/10V X5R output capacitance (C2), and 1nF feedforward capacitor (C3) to enhance transient response and stability. The /EN pin is hard-wired to GND for automatic enable, eliminating external control but confirming startup sequencing behavior.

Key Specifications

Availability

EV20046DQ-00A is available at Aetrix Electronics and suitable for telecom infrastructure, server power sequencing, FPGA core supply validation, and DSP voltage rail characterization requiring stable component supply and repeatable bench evaluation.

Supply support for EV20046DQ-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 MP20046 product line delivers ultra-low-noise, high-PSRR linear regulators targeting noise-critical digital loads such as FPGAs, ASICs, and RF transceivers where switching noise must be eliminated.

FAQ

What input voltage range is supported on the EV20046DQ-00A board?

The board is designed for 4.3V to 5.5V input only, as specified in the Quick Start Guide and validated by capacitor voltage ratings (C1: 16V, C2: 10V) and thermal limits at 2A. Operation outside this range risks instability or damage and is not characterized.

Can the output voltage be adjusted on this evaluation board?

No - the EV20046DQ-00A uses the MP20046DQ variant with internally fixed 3.3V output. To test other voltages (e.g., 1.5V, 1.8V, 2.5V), the U1 IC must be desoldered and replaced with the corresponding MP20046DQ version, as stated in the Quick Start Guide.

What is the purpose of the 1nF capacitor (C3) on the board?

C3 is a feedforward capacitor placed across the feedback network to improve transient response and phase margin. Its 1nF value and 50V X7R dielectric are selected per MP20046DQ's application guidance to suppress high-frequency output deviations during load steps.

How is power-good functionality implemented and verified?

The /PG pin is routed to a test point and configured as open-drain. It asserts low when VOUT is within ±3% of 3.3V and remains low during undervoltage, overtemperature, or current-limit events - confirmed in the schematic and functional description.

Does the board include thermal management provisions for 2A continuous operation?

Yes - the MP20046DQ is mounted in a QFN10 (3×3 mm) package with an exposed thermal pad connected to a dedicated copper pour on the bottom layer, as shown in the PCB layout figures. This enables sustained 2A operation with ≤45°C temperature rise under typical ambient conditions.