Monolithic Power Systems Inc. EVQ2177-LE-00A

Overview

EVQ2177-LE-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified evaluation board for the MPQ2177GQHE-AEC1 synchronous step-down converter, delivering 1.2V/1A output from a 2.5V–5.5V input. It integrates 75mΩ/45mΩ internal MOSFETs, operates at 2.4MHz, and features Power Good (PG), external soft-start (SS), over-voltage protection (OVP), short-circuit protection (SCP) with hiccup mode, and output discharge - enabling rapid validation of automotive power rail designs.

For engineers reviewing the EVQ2177-LE-00A datasheet, EVQ2177-LE-00A pinout, EVQ2177-LE-00A application, or EVQ2177-LE-00A equivalent, this board supports fast functional verification of MPQ2177-based 1.2V/1A power supplies in AEC-Q100-compliant systems - including load regulation testing, efficiency characterization across VIN/VOUT combinations, EN/SS timing analysis, and PG assertion under startup/shutdown/fault conditions.

Technical Context

The EVQ2177-LE-00A implements forced continuous conduction mode (CCM) across full load range to ensure stable operation and low output ripple. Its 2.4MHz switching frequency enables compact external components: 2.2µH inductor (XFL4020-222MEB), 22µF output ceramic capacitor (GRM21BR60J226ME39L), and integrated compensation network eliminate need for external loop compensation.

Board-level design includes dedicated test points for VIN, VOUT, GND, EN, PG, and SS; configurable feedback resistors (R5/R6) support output voltage adjustment from 0.6V to 3.3V; and thermal performance is validated up to 1A load with ≤0.2W power loss at 5.5V_IN/1.2V_OUT.

Key Specifications

Availability

EVQ2177-LE-00A is available at Aetrix Electronics and suitable for automotive cluster power validation, telematics subsystem testing, and camera module DC-DC qualification requiring stable component supply and AEC-Q100-aligned reference hardware.

Supply support for EVQ2177-LE-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 power management ICs, with design focus on efficiency, integration, and automotive-grade reliability.

The EVQ2177-LE-00A belongs to MPS's automotive evaluation board product line, engineered to accelerate design-in of AEC-Q100-qualified DC-DC converters in safety-critical vehicle subsystems - particularly where small size, high efficiency, and robust fault handling are mandatory.

FAQ

What input voltage range does the EVQ2177-LE-00A support?

The board accepts 2.5V to 5.5V DC input, matching the operating range of the MPQ2177 IC. This range accommodates automotive battery voltages including cold-crank (down to ~2.5V) and post-load-dump conditions (up to 5.5V), and is verified across all test curves in the datasheet.

Can I adjust the output voltage beyond the default 1.2V?

Yes - the board uses a resistor divider (R5/R6) on the FB pin to set V_OUT. Table 1 in the datasheet provides values for 1.0V, 1.2V, 1.8V, 2.5V, and 3.3V outputs. R5 must be between 10kΩ and 100kΩ; R6 is calculated using V_OUT = 0.6V × (1 + R5/R6).

How is Power Good (PG) behavior verified on this board?

PG asserts high when V_OUT reaches 90% of target and remains within ±10% regulation. Waveforms in Figures 10–13 show PG timing during startup (via VIN or EN), shutdown, short-circuit entry/recovery, and load transients - confirming accurate fault signaling and sequencing capability.

Does the board support external soft-start control?

Yes - the SS pin accepts an external capacitor to control ramp rate. The schematic shows C3 (2.2nF) connected to SS, enabling adjustable soft-start time per Equation (2) in the datasheet. This allows precise inrush current limiting during power-up in sensitive systems.

What protection features are implemented and how are they tested?

The board demonstrates OVP, SCP (hiccup mode), thermal shutdown, and output discharge. Test results include SCP entry/recovery waveforms (Figures 11–12), PG behavior during faults (Figures 10, 13), and thermal imaging data confirming safe operation at 1A ambient temperature.

Is the MPQ2177 IC on this board AEC-Q100 qualified?

Yes - the mounted IC is MPQ2177GQHE-AEC1, explicitly rated for AEC-Q100 Grade 1 (−40°C to +125°C junction temperature). The board itself is designed and tested to support validation of that qualification in system-level environments.