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

Overview

MPQ4263GQVE-0002-AEC1-P 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 (POUT), supports 3.6V–36V input and 1V–36V output ranges, operates at 280kHz switching frequency (factory OTP-configured for 100W USB PD), and features ±5% accurate CC current limit and 98% peak efficiency.

For engineers reviewing the MPQ4263GQVE-0002-AEC1-P datasheet, MPQ4263GQVE-0002-AEC1-P pinout, MPQ4263GQVE-0002-AEC1-P application, or MPQ4263GQVE-0002-AEC1-P equivalent, this device is selected for automotive USB PD charging ports requiring programmable voltage/current regulation, robust fault protection (OVP/OCP/TSD), and I²C-configurable reference voltage (0.1V–2.147V) in a wettable-flank QFN-20 package.

Technical Context

The MPQ4263GQVE-0002-AEC1-P implements a fixed-frequency buck-boost topology with dual integrated LS-FETs and external HS-FET gate drivers (HG1/HG2), enabling seamless mode transitions between buck, boost, and buck-boost based on VIN/VOUT ratio. Its control loop integrates a PLL-based oscillator, error amplifier, and programmable slew-rate DAC for stable CV/CC regulation.

It uses high-side current sensing via ISEN+/ISEN− for precise ±5% output current limiting and real-time IMON monitoring, while line drop compensation (via RSENS) and VCC LDO biasing improve load regulation and system efficiency. The I²C interface (400–1000 kHz) configures VREF, switching frequency, operation mode (PWM/PPM), and protection thresholds stored in one-time programmable memory.

Key Specifications

Pinout & Package

MPQ4263GQVE-0002-AEC1-P is housed in a wettable-flank QFN-20 (3mm × 5mm) package with exposed thermal pad for enhanced thermal performance in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4263GQVE-0001-AEC1, the -0002 variant trades higher-frequency EMI for greater 100W output capability at 280kHz; versus LM5175QRGERQ1, it offers faster time-to-market via integrated LS-FETs and I²C configurability but less flexibility in FET selection and thermal management.

Availability

MPQ4263GQVE-0002-AEC1-P is available at Aetrix Electronics and suitable for automotive USB PD charging ports, infotainment power supplies, and wireless charging transmitters requiring stable component supply, AEC-Q100 qualification, and I²C programmability.

Supply support for MPQ4263GQVE-0002-AEC1-P 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 over two decades of expertise in DC/DC conversion, motor drivers, and battery management.

The MPQ4263 product line targets automotive-grade USB PD and high-reliability DC power conversion, designed specifically to meet AEC-Q100 Grade 1 requirements while integrating I²C configurability and high-side current sensing for next-generation vehicle electrification.

FAQ

What does the "0002" suffix in MPQ4263GQVE-0002-AEC1-P signify?

The "0002" denotes the factory-programmed one-time programmable (OTP) configuration code. This specific variant is preconfigured for 100W USB PD applications with a fixed 280kHz switching frequency, default VREF setting, and optimized startup parameters-no field reprogramming is possible.

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

Yes. The device integrates two low-side MOSFETs but requires external N-channel high-side switches (SWA and SWD) driven by HG1 and HG2 outputs. Bootstrap capacitors (0.22 µF) must be placed between BST1/SW1 and BST2/SW2 for proper gate drive.

How is high-side current sensing implemented, and why is it advantageous?

High-side sensing uses differential inputs ISEN+ and ISEN− across an external sense resistor placed between the input source and SWA/SWD drains. This avoids ground path contamination, enables accurate CC limiting under all operating modes (buck/boost/buck-boost), and supports true output current monitoring independent of load ground.

Can MPQ4263GQVE-0002-AEC1-P operate without I²C communication?

Yes. The device functions autonomously using factory OTP settings. I²C is optional for runtime reconfiguration of VREF, fSW, protection thresholds, and operation mode-but not required for basic CV/CC regulation or fault protection.

What thermal performance can be expected in a typical automotive PCB layout?

On a 4-layer 64mm × 64mm evaluation board, θJA is 20.7°C/W. With proper thermal vias under the exposed pad and 2 oz copper, case temperature rise remains below 40°C at 5A/20V output. Derating is recommended above 125°C junction temperature.

Is the VCC LDO internally powered, and what are its sourcing conditions?

VCC is an internal 5V LDO that auto-sources from VOUT when VOUT exceeds 6.8V (VCC_VTH), eliminating need for external bias. Below that, it draws from VIN. VCC UVLO (3.15–3.55V) ensures clean startup, and load regulation stays within ±5% up to 50mA.

How does the device handle mode transitions between buck, boost, and buck-boost?

It uses a seamless fixed-frequency control strategy with automatic transition thresholds (VIN/VOUT = 120% for buck-boost→buck, 82% for buck-boost→boost). No discontinuity or regulation loss occurs; the error amplifier and PWM comparator maintain continuous loop stability across all regions.