Monolithic Power Systems Inc. EV2005DD-01B

Overview

EV2005DD-01B from Monolithic Power Systems is an evaluation board for the MP2005 500mA low-dropout linear regulator, designed to demonstrate adjustable low-voltage regulation (0.5V–5V) with 75mV dropout at full load, 2% output accuracy, and operation from 2.5V–5V input and 3.5V–5.5V bias supplies. It supports thermal/current protection and stable operation with ultra-low-ESR ceramic capacitors.

For engineers reviewing the EV2005DD-01B datasheet, EV2005DD-01B pinout, EV2005DD-01B application, or EV2005DD-01B equivalent, this board enables rapid validation of MP2005-based low-noise (80µVRMS), high-PSRR (40dB @ 1MHz), low-quiescent-current (100μA) LDO designs in battery-powered and post-regulation systems.

Technical Context

The EV2005DD-01B implements the MP2005 IC in a fully assembled 8-pin QFN (2mm × 3mm) layout with separate VIN and BIAS supply rails-VIN powers the output path while BIAS (3.5V–5.5V) powers internal reference and control circuitry. This dual-rail architecture isolates reference stability from input ripple and enables precise 0.5V internal reference-based output programming.

It integrates fixed 1.8V output configuration via R1=26.1kΩ and R2=10kΩ feedback network, supports EN-controlled startup via jumper JP2, and uses low-ESR ceramic capacitors (C1=10µF/1206, C2=4.7µF/1206, C4=2.2µF/0805) for transient response and stability without requiring tantalum or electrolytic types.

Key Specifications

Availability

EV2005DD-01B is available at Aetrix Electronics and suitable for low-power handheld devices, battery-powered systems, and post-regulation stages in switching power supplies requiring stable component supply, fast design iteration, and verified LDO performance validation.

Supply support for EV2005DD-01B 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 converters, LDOs, motor drivers, and LED drivers.

The EV2005DD-01B belongs to MPS's evaluation board product line targeting rapid prototyping of low-noise, low-quiescent-current linear regulators for space-constrained, battery-sensitive applications such as wearables and IoT edge nodes.

FAQ

What is the purpose of the separate BIAS supply on the EV2005DD-01B?

The BIAS supply (3.5V–5.5V) powers the MP2005's internal voltage reference and gate drive circuitry independently from VIN. This decoupling maintains reference accuracy and regulation stability even when VIN sags or contains high ripple, enabling consistent 2% output accuracy and fast transient response under dynamic load conditions.

Can the output voltage be adjusted, and how?

Yes-the output is adjustable from 0.5V to 5.0V using the external resistor divider formed by R1 and R2. With default values (R1 = 26.1kΩ, R2 = 10kΩ), VOUT = 1.8V. The formula VOUT = 0.5V × (1 + R1/R2) allows precise reconfiguration; changing either resistor alters the feedback ratio and thus the regulated output voltage.

What capacitor types and values are used for stability?

The board uses only X7R ceramic capacitors: C1 (10µF, 1206), C2 (4.7µF, 1206), and C4 (2.2µF, 0805). These low-ESR, high-frequency-stable components ensure loop stability across temperature and load, eliminate need for bulk electrolytics, and support fast transient recovery without oscillation or ringing.

How is enable functionality implemented?

Enable is controlled via JP2: shorting pins 1–2 connects EN to BIAS for automatic startup; opening the jumper or connecting EN to GND disables the MP2005 output. This provides hardware-level on/off control independent of VIN or load conditions, supporting system-level power sequencing and low-power sleep modes.

Does the board include overtemperature or overcurrent protection?

Yes-the MP2005 IC integrated into the board features internal thermal shutdown and current-limit protection. When junction temperature exceeds safe threshold or output current exceeds limit, regulation ceases and the device enters safe shutdown until conditions normalize, preventing damage during fault events or sustained overload.

What are the physical dimensions and mounting options?

The board measures 2.9" × 2.9" × 0.5" (7.5cm × 7.5cm × 1.2cm) with standard 0.1" pitch headers (JP1: 10-pin, JP2: 5-pin) for easy connection to test equipment or host systems. No mounting holes are included; it is intended for benchtop evaluation rather than embedded mechanical integration.