Monolithic Power Systems Inc. MPQ4263GQVE-0002-AEC1-Z

Overview

MPQ4263GQVE-0002-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 automotive-qualified buck-boost DC/DC converter with two integrated low-side MOSFETs, I²C interface, and high-side current sensing. It delivers up to 140W peak output power (at VIN ≥ 19V), supports 1V–36V output voltage range, operates from 3.6V–36V input, and is configured for 100W USB PD applications at 280kHz switching frequency.

For engineers reviewing the MPQ4263GQVE-0002-AEC1-Z datasheet, MPQ4263GQVE-0002-AEC1-Z pinout, MPQ4263GQVE-0002-AEC1-Z application, or MPQ4263GQVE-0002-AEC1-Z equivalent, this device is selected for automotive USB PD charging ports requiring programmable CC/CV regulation, high-side current monitoring, and robust fault protection including OVP, thermal shutdown, and hiccup-mode over-current response.

Technical Context

The MPQ4263 implements a fixed-frequency, four-switch buck-boost topology with dual integrated LS-FETs and external HS-FET drive capability via HG1/HG2 gate drivers. Its control loop uses a PLL-synchronized oscillator with selectable 280/420/580kHz fSW and supports forced PWM or auto PFM/PWM mode.

It features I²C-configurable VREF (0.1V–2.147V, 1mV resolution), accurate ±5% CC current limit using high-side sensing (ISEN+/ISEN−), real-time IMON output (68 V/V gain @ RSENS = 5mΩ), and line-drop compensation via RSENS. The device meets USB PD 3.1 EPR and PPS specifications.

Key Specifications

Pinout & Package

MPQ4263GQVE-0002-AEC1-Z is housed in a wettable-flank QFN-20 (3mm × 5mm) package with exposed thermal pad, optimized for automotive thermal reliability and automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost converter applications.

Compared with MPQ4263GQVE-0002-AEC1-Z, MPQ4269 offers higher power headroom but lacks factory OTP configuration, while LM5175RGERQ1 trades integration and digital control for flexibility in FET selection and lower base cost - neither matches the out-of-box 100W USB PD readiness and high-side sensing accuracy of the MPQ4263GQVE-0002-AEC1-Z.

Availability

MPQ4263GQVE-0002-AEC1-Z is available at Aetrix Electronics and suitable for automotive USB PD charging ports, infotainment power rails, wireless charging transmitters, and telematics DC power supplies requiring stable component supply with AEC-Q100 qualification.

Supply support for MPQ4263GQVE-0002-AEC1-Z 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 for automotive, industrial, and consumer markets, with design centers in the US, China, and Taiwan.

The MPQ4263 belongs to MPS's automotive-grade buck-boost converter product line, engineered specifically for USB PD 3.1 EPR and PPS-compliant in-vehicle power delivery systems requiring high integration, programmability, and AEC-Q100 reliability.

FAQ

What does the "0002" in MPQ4263GQVE-0002-AEC1-Z signify?

The "0002" is a factory-programmed OTP configuration code that sets the device for 100W USB PD operation at 280kHz switching frequency, with corresponding VREF, OCP, and mode defaults. It cannot be reprogrammed in the field and eliminates the need for initial I²C setup.

Does MPQ4263GQVE-0002-AEC1-Z require external high-side MOSFETs?

Yes - the MPQ4263 integrates only low-side MOSFETs (LS-FETs). External high-side MOSFETs are driven by HG1 and HG2 gate outputs, enabling design flexibility for voltage/current scaling and thermal partitioning in automotive applications.

How does high-side current sensing improve system accuracy?

High-side sensing (via ISEN+/ISEN−) measures current before it reaches noisy ground paths, avoiding errors from shared PGND impedance. This yields ±5% CC limit accuracy even under high di/dt load transients common in USB PD and wireless charging.

Can MPQ4263GQVE-0002-AEC1-Z operate below 3.6V input?

No - the minimum start-up input voltage is 3.6V. However, once running, it supports falling VIN down to 2.8V when VOUT > 3.5V, enabling limited operation during automotive cold-crank events without full shutdown.

Is the VCC pin self-powered, and what happens if VOUT drops below 6.4V?

VCC is internally generated from VOUT when VOUT exceeds 6.4V (VCC_VTH). If VOUT falls below this threshold, the internal 5V LDO shuts down and the device relies on external VCC bias or enters UVLO - requiring careful sequencing in multi-rail systems.

What thermal performance can be expected on a standard 4-layer PCB?

On a JEDEC-standard 4-layer board, θJA is 9.1°C/W. At 100W output with 280kHz fSW, junction temperature rise is ~91°C above ambient - confirming suitability for Grade 1 (−40°C to +125°C TJ) operation with appropriate heatsinking.

Does the ALT pin support interrupt-driven fault handling?

Yes - ALT is an open-drain active-low interrupt output triggered by OVP, OCP, or thermal shutdown. It can directly drive a microcontroller GPIO with pull-up, enabling immediate fault logging or graceful system shutdown without polling I²C registers.