Monolithic Power Systems Inc. EV2005DD-00B

Overview

EV2005DD-00B from Monolithic Power Systems is an evaluation board for the MP2005 500mA low-dropout linear regulator, featuring adjustable 0.5V–5V output, 75mV dropout at full load, 2% output accuracy, and operation from 2.5V–5V input with separate 3.5V–5.5V bias supply. It supports thermal/current protection and stable regulation with ≥1µF ceramic output capacitors.

For engineers reviewing the EV2005DD-00B datasheet, EV2005DD-00B pinout, EV2005DD-00B application, or EV2005DD-00B equivalent, this board enables rapid validation of MP2005 performance in low-noise, post-regulation, and battery-powered designs requiring precise low-voltage rail generation.

Technical Context

The EV2005DD-00B implements the MP2005 LDO in a fully assembled 8-pin QFN (2mm × 3mm) layout with external feedback resistors (R1 = 26.1kΩ, R2 = 10kΩ) setting VOUT = 1.8V. It uses a dedicated BIAS supply (3.5V–5.5V) to power internal reference and drive circuitry independently from VIN, enabling ultra-low-noise regulation without compromising PSRR.

Stability is achieved with 1µF–4.7µF X7R ceramic capacitors (C2 = 4.7µF, C1/C4 = 2.2µF), and fast transient response is supported by low 100µA ground current and 80µV_RMS integrated noise (10Hz–100kHz). The EN pin allows controlled startup via jumper JP2.

Key Specifications

Availability

EV2005DD-00B 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 and rapid LDO validation.

Supply support for EV2005DD-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 expertise in DC/DC converters, LDOs, motor drivers, and LED drivers.

The MP2005 product line delivers ultra-low-noise, precision-adjustable LDOs for applications demanding tight voltage tolerance, minimal EMI, and compatibility with miniature ceramic capacitors in space-constrained portable electronics.

FAQ

What is the purpose of the separate BIAS supply on the EV2005DD-00B?

The BIAS supply (3.5V–5.5V) powers the internal reference and gate-drive circuitry of the MP2005 independently from VIN. This architecture isolates noise-sensitive analog blocks from the power path, enabling lower output noise (80µV_RMS) and higher PSRR (40dB at 1MHz) without increasing dropout voltage.

Can the output voltage be adjusted, and how?

Yes. VOUT is set by external resistors R1 and R2 using VOUT = 0.5V × (1 + R1/R2). Default values (R1 = 26.1kΩ, R2 = 10kΩ) yield 1.8V. Adjusting either resistor changes the output within 0.5V–5V, maintaining 2% accuracy across temperature and load.

What capacitor types and values are validated for stability?

The board uses 4.7µF (C2) and 2.2µF (C1, C4) X7R ceramic capacitors in 1206 package. The MP2005 is stable with ≥1µF ceramic output capacitors having ESR as low as 5mΩ - no tantalum or electrolytic capacitors required.

How is enable functionality implemented?

EN is brought out to a 2-pin header (JP2). By default, JP2 shorts EN to BIAS for automatic startup. Removing the jumper and connecting EN to GND disables the regulator, reducing quiescent current to <1µA - critical for battery standby modes.

Does the board include thermal and overcurrent protection?

Yes. The underlying MP2005 IC integrates thermal shutdown and foldback current limiting. These protections are active during evaluation and reflect production device behavior - no additional components or configuration are needed to enable them.

Is the EV2005DD-00B RoHS-compliant and lead-free?

Yes. All components on the EV2005DD-00B - including the MP2005DD QFN-8 IC, TDK and Panasonic passives, and Sullins headers - are RoHS-compliant and lead-free per MPS documentation Rev. 1.1 (December 2013) and standard industry certifications.