Monolithic Power Systems Inc. EVBL2172-J-00A

Overview

EVBL2172-J-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified evaluation board for the MPQ2172GJ synchronous step-down converter, supporting 2.5V–5.5V input and delivering up to 2A at adjustable output voltages down to 0.6V using constant-on-time (COT) control. It features integrated 80mΩ/45mΩ MOSFETs, 2.6MHz switching, EN/PWRGD sequencing, and full protection including hiccup-mode SCP and thermal shutdown - validated for automotive infotainment, clusters, and telematics power rails.

For engineers reviewing the EVBL2172-J-00A datasheet, EVBL2172-J-00A pinout, EVBL2172-J-00A application, or EVBL2172-J-00A equivalent, this page delivers verified board-level specifications, layout-critical design guidance, functional test points, supported input/output configurations, and direct mapping to the MPQ2172GJ IC's electrical behavior and automotive qualification scope.

Technical Context

The EVBL2172-J-00A implements the MPQ2172's COT control architecture with input-voltage feed-forward, enabling stable 2.6MHz operation across 2.5V–5.5V input and 0.6V–VIN−0.5V output ranges. Its PCB layout adheres to high-frequency buck converter best practices: short SW/GND/VIN paths, split PGND/AGND planes, and optimized feedback resistor placement adjacent to FB.

It validates key MPQ2172 behaviors including soft-start (1.3ms typical), power-good windowing (±10% of 0.6V FB reference), cycle-by-cycle OCP (4.5A typ), and auto-discharge during EN-driven shutdown - all under AEC-Q100 Grade 1 temperature stress (−40°C to +125°C junction).

Key Specifications

Availability

EVBL2172-J-00A is available at Aetrix Electronics and suitable for automotive infotainment system development, instrument cluster power supply validation, and telematics module prototyping requiring stable component supply, traceable sourcing, and AEC-Q100-aligned reference designs.

Supply support for EVBL2172-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 over two decades of expertise in DC/DC conversion, motor drivers, and battery management solutions.

The EVBL2172-J-00A belongs to MPS's automotive-grade evaluation board product line, designed specifically to accelerate qualification and integration of AEC-Q100-compliant power converters into safety-critical vehicle subsystems.

FAQ

What is the primary function of the EVBL2172-J-00A?

The EVBL2172-J-00A is a fully assembled, tested evaluation board for the MPQ2172GJ-AEC1 synchronous buck converter. It provides immediate hardware validation of the IC's electrical performance, protection features, and AEC-Q100 Grade 1 thermal behavior - including EN-controlled startup, PG signaling, soft-start/soft-stop timing, and hiccup-mode short-circuit recovery - using production-grade external components and layout.

Does the board support adjustable output voltage?

Yes. The board supports output voltages from 0.6V to 3.3V via external resistor divider (R1/R2) on the FB pin. Default configuration uses 41.2kΩ/41.2kΩ for 1.2V output, and 41.2kΩ/20.5kΩ for 1.8V output - both validated with <1% load regulation error across 0–2A and <0.5% line regulation from 2.7V–5.5V input.

Can the EVBL2172-J-00A be used for thermal testing under AEC-Q100 conditions?

Yes. The board's TSOT23-8 footprint, copper pour layout, and thermal vias match MPS-recommended guidelines for Grade 1 operation. Measured θJA is 100°C/W on a 4-layer JEDEC test board, enabling direct correlation of case temperature rise (≤16°C at 2A/1.2V) to the MPQ2172's 150°C max junction rating and 30°C thermal hysteresis shutdown behavior.

How are EN and PG signals accessed for system-level timing verification?

Both EN and PG pins are routed to 0.1" pitch test points (TP1 and TP2) with 50Ω impedance control. PG is open-drain with internal 500kΩ pull-up to VIN; its rising/falling thresholds (110%/90% of VFB) and 30–200μs delay are measurable against EN edge transitions to validate power sequencing compliance in automotive domain controllers.

Is the board compatible with the MPQ2178 replacement IC?

No. The EVBL2172-J-00A is mechanically and electrically optimized for the MPQ2172GJ's TSOT23-8 package and pinout (e.g., dedicated OUT and AGND pins). The MPQ2178 uses a different package and pin assignment; MPS explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MPQ2178", indicating this board is for legacy validation only, not drop-in replacement testing.

What input/output capacitors are populated, and why?

The board uses 10µF/10V X5R ceramic input capacitors (C1/C1A) and 22µF/16V X5R ceramic output capacitors (C2/C2A), matching MPS's recommendation for low-ESR stability at 2.6MHz. These values ensure <50mV peak-to-peak output ripple at 2A load and prevent VIN overshoot during soft-stop discharge - validated per Equation (11) in the MPQ2172 datasheet.

Does the board include provisions for efficiency measurement?

Yes. Input and output power paths feature Kelvin sense traces (VIN+/VIN−, VOUT+/VOUT−) with 4-pin headers, enabling accurate real-time efficiency calculation (up to 92% at 1.2V/1A, VIN=3.3V) without probe loading. Inductor current is also accessible via shunt resistor R4 for IL ripple analysis.