Monolithic Power Systems Inc. EVQ7920-R-00A

Overview

EVQ7920-R-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 evaluation board for the MPQ7920 5V automotive PMIC, integrating four buck converters (4.5A/2.5A/4.5A/2A), five LDOs, I²C/MTP programmability, and configurable power sequencing on a QFN-26 package. It supports automotive infotainment, video recorder, and display electronics with full thermal, overcurrent, overvoltage, and UVLO protection.

For engineers reviewing the EVQ7920-R-00A datasheet, EVQ7920-R-00A pinout, EVQ7920-R-00A application, or EVQ7920-R-00A equivalent, this board enables rapid validation of MPQ7920 register configuration, power-on/off sequence timing (0.5ms–16ms slots), soft-start slew rates (140–430μs), I²C slave address (0x69), and parallel operation of Buck1/Buck3 or Buck2/Buck4 under real automotive load transients.

Technical Context

The EVQ7920-R-00A implements the full MPQ7920 functional block diagram: four COT-controlled synchronous buck regulators with adjustable switching frequency up to 2.75MHz, five LDOs including a dedicated RTC LDO (3.3V/10mA), and dual-power-domain logic (VIN2/VIN5) supporting independent enable control via OUT2/EN1 pin. All rails are monitored and sequenced via MTP-programmed time slots and I²C-accessible registers.

It validates critical automotive-grade behaviors: ±4kV HBM/±2kV CDM ESD robustness across all pins, thermal shutdown at 153°C with 23°C hysteresis, and stable operation from −40°C to +125°C junction temperature. The board includes decoupling capacitors (22µF ×2 per buck, 0.1µF AVIN bypass), inductors (1µH/1.5µH), and resistor networks matching the typical application schematic on page 2 of the MPQ7920 datasheet.

Key Specifications

Availability

EVQ7920-R-00A is available at Aetrix Electronics and suitable for automotive infotainment system validation, ADAS video recorder power architecture testing, and automotive display electronics design requiring stable component supply and AEC-Q100-compliant reference hardware.

Supply support for EVQ7920-R-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) designs high-performance power management semiconductors for automotive, industrial, and cloud infrastructure applications, with core expertise in monolithic DC/DC conversion and integrated PMICs.

The MPQ7920 product line delivers compact, AEC-Q100-qualified power solutions for 5V automotive subsystems, emphasizing programmable sequencing, fast transient response via COT control, and minimal external component count for space-constrained ECUs.

FAQ

What components are included in the EVQ7920-R-00A kit?

The EVQ7920-R-00A kit contains one MPQ7920GRM evaluation board, one EVKT-USBI2C-02 USB-to-I²C interface (with USB cable and ribbon cable), and two MPQ7920-0000 ICs for MTP programming and replacement. No external power supply or test equipment is included.

Can the EVQ7920-R-00A be used to program the MPQ7920's MTP memory?

Yes - the included EVKT-USBI2C-02 interface connects to the EVQ7920-R-00A's I²C header and enables full read/write access to all MTP registers using MPS's official GUI software. The board supports both single-time (0003) and two-time (0000) MTP versions as specified in the ordering table.

Does the evaluation board support parallel operation of buck converters?

Yes - the EVQ7920-R-00A layout and component selection (including matched inductors and feedback networks) fully support parallel operation of Buck1 and Buck3 (4.5A each) or Buck2 and Buck4 (2.5A/2A), validated per the functional block diagram and electrical characteristics on pages 16–17 of the datasheet.

What is the purpose of the AVIN and AGND pins on the evaluation board?

AVIN supplies clean 5V logic power to the MPQ7920's internal digital circuitry and must be bypassed with a 0.1µF ceramic capacitor to AGND. On the EVQ7920-R-00A, AVIN is connected through a 4.7Ω resistor to the main input bus, and AGND is tied to GND1/GND2 to minimize noise coupling into I²C and reset signaling.

How is power sequencing verified on this board?

Sequencing is verified using the RSTO open-drain reset output and oscilloscope measurements across all OUTx rails. The board implements the default MTP timing (e.g., Buck2 delayed 4.5ms, LDO2 delayed 5.5ms), and timing can be reprogrammed via I²C to validate custom sequences up to 16ms slot resolution.

Is the EVQ7920-R-00A compliant with AEC-Q100 stress testing requirements?

The board itself is not AEC-Q100 certified, but it hosts the AEC-Q100 Grade 1 MPQ7920GRM-0003-AEC1 IC and replicates the recommended PCB layout, thermal vias, and decoupling network from MPS's qualification report - enabling accurate pre-compliance functional and thermal validation.