Monolithic Power Systems Inc. EVM3515-QV-02A

Overview

EVM3515-QV-02A from Monolithic Power Systems is an evaluation board for the MPM3515GQV-AEC1 synchronous step-down Mini-Module regulator, delivering 3.3 V at 1.5 A continuous output with 4–36 V input range, fixed 2.2 MHz switching frequency, and integrated inductor/MOSFETs in a QFN-17 (3 mm × 5 mm × 1.6 mm) package. It supports automotive-grade AEC-Q100 Grade 1 operation and includes power-good indication, valley-current OCP, and thermal shutdown.

For engineers reviewing the EVM3515-QV-02A datasheet, EVM3515-QV-02A pinout, EVM3515-QV-02A application, or EVM3515-QV-02A equivalent, this board enables rapid validation of the MPM3515's performance in industrial control, telecom, medical imaging, and distributed power systems under real-world load/line regulation and EMI conditions.

Technical Context

The EVM3515-QV-02A implements a forced continuous conduction mode (CCM) buck converter using the MPM3515GQV-AEC1 IC, which integrates high- and low-side MOSFETs, a 2.2 µH shielded inductor, input/output capacitors, and internal compensation. Its feedback loop uses an external resistor divider (R1 = 82 kΩ, R2 = 26.1 kΩ) to set VOUT = 3.3 V with 0.807 V reference.

Input EMI filtering employs CIN4 (10 µF X7R) and CIN5 (22 µF electrolytic) plus FB1 magnetic bead; EN/SYNC pin supports enable control (1.45 V rising threshold) and external clock synchronization from 450 kHz to 2.2 MHz; PG pin asserts high when output is within ±5% of regulation.

Key Specifications

Availability

EVM3515-QV-02A is available at Aetrix Electronics and suitable for industrial controls, automotive subsystems, and medical imaging equipment requiring stable component supply, pre-validated power architecture, and AEC-Q100-compliant reference designs.

Supply support for EVM3515-QV-02A 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 design centers across Asia and North America and global distribution.

The MPM3515 product line delivers fully integrated, AEC-Q100 Grade 1 qualified DC/DC step-down modules targeting space-constrained automotive infotainment, ADAS camera modules, and industrial PLCs needing robust, low-noise, and EMI-compliant power conversion.

FAQ

What is the default output voltage and how is it set?

The EVM3515-QV-02A is factory-configured for 3.3 V output using an external resistor divider (R1 = 82 kΩ, R2 = 26.1 kΩ) referenced to the internal 0.807 V feedback node. This configuration ensures ±1% initial accuracy and supports reconfiguration down to 0.8 V by adjusting R1 and R2 values per the provided equation.

How do I enable or disable the MPM3515 using the EN pin?

To enable the regulator, apply ≥1.45 V (with 0.45 V hysteresis) between EN and GND; to disable, reduce voltage below 1.0 V. R3 (1 MΩ) must be removed first to isolate the internal pull-up. The EN pin also supports logic-level control compatible with microcontrollers and FPGA GPIOs.

Can the switching frequency be synchronized to an external clock?

Yes - the SYNC pin accepts an external CMOS clock signal from 450 kHz to 2.2 MHz. When enabled, the internal oscillator synchronizes its rising edge to the external clock's rising edge, reducing beat frequencies and improving EMI predictability in multi-rail systems.

What input filtering is implemented and why?

The board includes CIN4 (10 µF X7R), CIN5 (22 µF electrolytic), and FB1 (BLM18PG330SN1 magnetic bead) to dampen high-frequency ringing caused by long input cables (>0.5 m) and suppress common-mode noise. This configuration meets CISPR 25 Class 5 requirements when used with proper layout and grounding.

Is thermal performance validated, and what is the maximum ambient temperature for full 1.5 A output?

Test data confirms 1.5 A continuous output at TA = 25°C with VIN = 12 V. Derating begins above 60°C ambient due to thermal shutdown activation at ~150°C junction temperature; PCB copper area and airflow significantly impact sustained current capability in enclosed environments.

Does the board support adjustable soft-start or power sequencing?

No - the MPM3515GQV-AEC1 does not include programmable soft-start. Startup is controlled by EN pin assertion and internal 1 ms delay; power sequencing must be managed externally via controller-driven EN timing or upstream regulators.