Monolithic Power Systems Inc. EVQ28164-D-00A

Overview

EVQ28164-D-00A from Monolithic Power Systems is a ready-to-use evaluation board for the MPQ28164 high-efficiency single-inductor buck-boost DC-DC converter, supporting 1.2V–5.5V input and delivering adjustable 1.5V–5V output up to 2A (VIN > 2.4V), with 2MHz switching frequency, 25μA quiescent current, and QFN-11 (2mm × 3mm) package integration.

For engineers reviewing the EVQ28164-D-00A datasheet, EVQ28164-D-00A pinout, EVQ28164-D-00A application, or EVQ28164-D-00A equivalent, this board enables rapid validation of battery-powered systems requiring seamless voltage regulation across input ranges spanning below, above, and equal to the output - especially in portable instruments, tablet PCs, and super-capacitor charging circuits.

Technical Context

The EVQ28164-D-00A implements the MPQ28164 IC in a fixed-layout, fully assembled PCB configuration optimized for efficiency testing and functional verification. It integrates a 1μH power inductor, dual 22μF output capacitors, and precision feedback resistors (R1=560kΩ, R2=100kΩ) presetting VOUT to 3.3V with 0.5V reference.

Board-level features include selectable PSM/PWM mode via MODE/SYNC pin, power-good (PG) indicator, hiccup-mode short-circuit protection, thermal and overvoltage protection, and internal soft-start - all validated under VIN = 3.3V, VOUT = 3.3V, TA = 25°C conditions per MPS Rev.1.0 test report.

Key Specifications

Availability

EVQ28164-D-00A is available at Aetrix Electronics and suitable for battery-powered product development, portable instrumentation validation, tablet PC power architecture testing, and super-capacitor charger design requiring stable component supply and fast-turnaround evaluation support.

Supply support for EVQ28164-D-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 expertise in DC-DC conversion, LED drivers, and motor control solutions.

The MPQ28164 product line targets ultra-low-power, wide-input-range buck-boost regulation for energy-constrained portable electronics - emphasizing efficiency at light loads, minimal external components, and robust protection features.

FAQ

What input voltage range does the EVQ28164-D-00A support?

The board supports 1.2V to 5.5V input, with minimum startup voltage of 1.8V. Operation below 1.8V is not guaranteed; performance degrades below 2.4V due to inductor current limits affecting maximum load capability.

How do I change the output voltage from the default 3.3V?

Replace R1 and R2 per the formula VOUT = VFB × (1 + R1/R2), where VFB = 0.5V. Recommended R1 range is 300kΩ–620kΩ for optimal light-load efficiency; output is adjustable from 1.5V to 5V.

Does the board include short-circuit protection?

Yes - the MPQ28164 IC implements hiccup-mode short-circuit protection (SCP). During fault, the device cycles on/off until the overload is removed, preventing thermal damage during sustained overloads.

Can I force continuous conduction mode (CCM) on this board?

Yes - connect jumper JP1 between VIN and MODE/SYNC pins after powering off the board. This disables pulse-skipping mode and forces CCM operation, improving ripple performance at light loads.

What is the role of the PG (Power Good) signal?

The PG pin outputs an open-drain active-high signal indicating regulated output stability. It asserts after soft-start completes and VOUT reaches ±10% of target; it deasserts during undervoltage, overtemperature, or shutdown events.

Is the board RoHS-compliant and lead-free?

Yes - all components on EVQ28164-D-00A meet RoHS Directive requirements. MPS confirms full lead-free compliance across its product portfolio, including the MPQ28164GD IC and associated passives.