Monolithic Power Systems Inc. EV20046DN-00A

Overview

EV20046DN-00A from Monolithic Power Systems is an evaluation board for the MP20046DN-F low-noise, high-PSRR linear regulator, configured for 1.5V/2A output with fast transient response, 75μA ground current at full load, and open-drain power-good signaling. It supports input voltages from 2.7V to 5.5V and integrates thermal shutdown, current limiting, and PMOS pass element architecture.

For engineers reviewing the EV20046DN-00A datasheet, EV20046DN-00A pinout, EV20046DN-00A application, or EV20046DN-00A equivalent, key selection considerations include its fixed 1.5V output configuration, SOIC8E-mounted MP20046DN-F IC, on-board 10μF/47μF ceramic input/output capacitance, /EN control interface, and PG signal routing for system power sequencing validation.

Technical Context

The EV20046DN-00A implements a fixed-output (1.5V), 2A LDO evaluation platform using the MP20046DN-F in SOIC8E package, featuring internal PMOS pass transistor, 300mV dropout at full load, and 70dB PSRR at 100Hz. Its layout includes dedicated VIN, VOUT, GND, /EN, and PG terminals with optimized high-frequency decoupling via 0805 and 1210 X5R/X7R ceramics.

Board-level design enables direct measurement of transient response (undershoot/overshoot under 1A step load), power-good assertion timing (typ. 100μs delay), and thermal behavior under sustained 2A load - all while maintaining 17μVRMS output noise and <1μA shutdown quiescent current.

Key Specifications

Availability

EV20046DN-00A is available at Aetrix Electronics and suitable for telecom power validation, FPGA core voltage testing, and server board bring-up requiring stable component supply, repeatable bench characterization, and rapid LDO performance verification.

Supply support for EV20046DN-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, headquartered in California and serving global power management markets since 1997.

The EV20046DN-00A belongs to MPS's linear regulator evaluation board family, designed specifically to accelerate validation of low-noise, high-PSRR LDOs in noise-sensitive digital supply applications such as DSP, FPGA, and ASIC core rails.

FAQ

What is the purpose of the /EN pin on the EV20046DN-00A board?

The /EN pin controls startup and shutdown of the MP20046DN-F regulator. It is pulled to GND by default for automatic operation. Connecting it to VIN disables the device. Floating /EN is prohibited per design guidelines to prevent erratic behavior or latch-up during power transitions.

Can the output voltage be changed on this evaluation board?

No - EV20046DN-00A is factory-configured for 1.5V output via the MP20046DN-F IC's internal feedback. To evaluate other voltages (e.g., 1.8V, 2.5V, 3.3V), the U1 IC must be desoldered and replaced with the corresponding MP20046DN variant; no resistor network modification is supported.

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

C3 (1nF, 0805, X7R, 50V) serves as high-frequency noise suppression on the PG signal line, reducing edge-induced coupling into sensitive monitoring circuitry. It is placed adjacent to the MP20046DN-F's PG pin and does not affect regulation loop stability or transient response.

How is thermal performance validated on this board?

Thermal validation uses the board's 2oz copper thermal pad under the SOIC8E package and outer-layer copper pours connected to GND. At 2A/1.5V with 5V input, surface temperature rise is ≤22°C above ambient (25°C) after 5 minutes, measured per JEDEC JESD51-2 standards using thermocouple on IC center.

Is the power-good (PG) signal actively driven or open-drain?

The PG signal is open-drain, matching the MP20046DN-F's native output structure. The board includes a 100kΩ pull-up resistor (R1) to VIN, enabling compatibility with 1.8V–5V logic systems. External pull-up voltage must match the target host controller's I/O voltage domain.

Does this board support input voltage sequencing requirements?

Yes - the /EN pin allows controlled startup relative to other rails, and the PG signal provides system-level confirmation of valid output regulation. Timing measurements show PG asserts within 100μs of VOUT reaching 95% of 1.5V, enabling synchronization with FPGA configuration or processor reset release.