Monolithic Power Systems Inc. EV2149-J-00A

Overview

EV2149-J-00A from Monolithic Power Systems is an evaluation board for the MP2149GJ dual synchronous buck regulator IC, designed to demonstrate 1.8V/1.2V dual-output regulation from 2.7–6V input, delivering 1A per channel with 45µA quiescent current and 1MHz fixed-frequency operation in TSOT23-8 package.

For engineers reviewing the EV2149-J-00A datasheet, EV2149-J-00A pinout, EV2149-J-00A application, or EV2149-J-00A equivalent, this board enables rapid validation of dual low-voltage rail generation in battery-powered portable systems with phase-shifted switching and hiccup-mode short-circuit protection.

Technical Context

The EV2149-J-00A implements a dual-channel, peak-current-mode-controlled synchronous buck topology using the MP2149GJ IC. It features 180° phase-shifted operation between channels to reduce input ripple, internal 100mΩ/40mΩ MOSFETs, and cycle-by-cycle overcurrent protection with thermal shutdown.

Board-level design includes two 1.5µH shielded inductors (Wurth 744312150), four 10µF X5R ceramic input/output capacitors (Murata GRM21BR61A106KE19L), and precision feedback resistors (806k/412k/825k) setting VOUT1=1.8V and VOUT2=1.2V with 0.608V minimum adjustable output.

Key Specifications

Availability

EV2149-J-00A is available at Aetrix Electronics and suitable for smartphone power validation, portable instrument dual-rail testing, and battery-powered device reference design requiring stable component supply and fast-turn prototyping support.

Supply support for EV2149-J-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 core expertise in DC-DC conversion, LED drivers, and motor control solutions.

The MP2149 product line targets ultra-low-quiescent-current dual buck regulation for space-constrained, battery-operated applications-emphasizing efficiency across load range and minimal external component count.

FAQ

What is the primary function of the EV2149-J-00A evaluation board?

The EV2149-J-00A is a fully assembled demonstration platform for the MP2149GJ dual synchronous buck regulator. It validates 1.8V/1.2V dual-output power delivery from 2.7–6V input at up to 1A per channel, featuring phase-shifted switching, hiccup-mode protection, and optimized PCB layout per MPS layout guidelines.

Can the output voltages be adjusted, and how?

Yes. VOUT1 and VOUT2 are set by external resistor dividers: R1/R2 (806k/412k) configures 1.8V on FB1, and R3/R4 (806k/825k) sets 1.2V on FB2. The MP2149 supports adjustment down to 0.608V; changing resistor values recalibrates outputs while maintaining stability per the internal compensation design.

What input voltage range is supported, and what happens below 3V?

The board operates from 2.7V to 6V input. At VIN < 3V, the datasheet notes increased input capacitance may be required to maintain stability and transient response-C1 and C2 (22µF each) are sized for typical 3.3–5V use; additional low-ESR ceramics may be added near VIN/GND pins for sub-3V operation.

How is enable control implemented on this board?

EN1 and EN2 are brought out to test points and accept TTL/CMOS logic: drive >1.2V to enable the respective channel, <0.4V to disable. Both channels can be controlled independently or tied together. No pull-up/pull-down resistors are installed by default, allowing flexible host-system control.

What layout practices does the EV2149-J-00A demonstrate for MP2149GJ?

The board follows MPS-recommended layout: input capacitors (C1/C2) placed directly between VIN (Pin 7) and PGND (Pin 5); feedback resistors located adjacent to FB1 (Pin 8) and FB2 (Pin 1); power inductors routed with minimal loop area; and thermal pad (Pin 4) fully soldered to inner ground plane for thermal performance.

Is the EV2149-J-00A RoHS-compliant and lead-free?

Yes. All components-including the MP2149GJ IC, Murata capacitors, Wurth inductors, and Royal resistors-are RoHS-compliant and lead-free, consistent with MPS's green policy and documented on the MPS Quality Assurance website.