Monolithic Power Systems Inc. MPQ4263GQVE-0000-AEC1-Z

Overview

MPQ4263GQVE-0000-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, 3.6V–36V input range, 1V–36V output range, up to 140W peak output power, and I²C-configurable reference voltage (0.1V–2.147V). It delivers USB PD 3.1 EPR/PPS-compliant power in automotive DC supplies and USB PD charging ports.

For engineers reviewing the MPQ4263GQVE-0000-AEC1-Z datasheet, MPQ4263GQVE-0000-AEC1-Z pinout, MPQ4263GQVE-0000-AEC1-Z application, or MPQ4263GQVE-0000-AEC1-Z equivalent, key selection criteria include high-side current-sense accuracy (±5%), selectable 280/420/580kHz switching frequency, forced PWM/auto PFM mode, thermal shutdown at 160°C, and QFN-20 wettable flank package compatibility with automotive PCB layout requirements.

Technical Context

The MPQ4263 implements a fixed-frequency, multi-mode buck-boost topology with seamless transitions between buck, boost, and buck-boost operating regions-controlled by VIN/VOUT ratio thresholds (120% buck-boost-to-buck, 82% buck-boost-to-boost). Its dual bootstrap gate drivers (HG1/HG2) support external high-side MOSFETs, while internal LS-FETs handle up to 12A peak SWC current and 9A valley SWB current.

I²C interface enables real-time configuration of VREF, switching frequency, OVP trim, and operation mode; OTP memory stores factory-default settings (0000 = 140W default config). High-side current sensing via ISEN+/ISEN− achieves ±5% CC limit accuracy, and IMON provides analog current monitor output with programmable gain (68 V/V or 34 V/V).

Key Specifications

Pinout & Package

MPQ4263GQVE-0000-AEC1-Z is housed in a thermally enhanced QFN-20 (3mm × 5mm) package with wettable flanks for automated optical inspection (AOI) and improved solder joint reliability in automotive production.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4263GQVE-0000-AEC1-Z, MPQ4269 offers higher power but sacrifices I²C configurability and USB PD compliance, while LM5175QRGERQ1 trades integration for design flexibility-making the MPQ4263 optimal for compact, standards-compliant automotive USB PD systems requiring field-tunable parameters.

Availability

MPQ4263GQVE-0000-AEC1-Z is available at Aetrix Electronics and suitable for USB PD charging ports, automotive DC power supplies, and wireless charging transmitters requiring stable component supply with AEC-Q100 Grade 1 qualification and full production traceability.

Supply support for MPQ4263GQVE-0000-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, with over two decades of expertise in DC/DC conversion, motor drivers, and battery management solutions.

The MPQ4263 belongs to MPS's automotive-grade buck-boost converter product line, designed specifically for USB PD 3.1 EPR/PPS-compliant power delivery in harsh-temperature, safety-critical vehicle environments.

FAQ

What is the function of the VOUT pin beyond output voltage sensing?

The VOUT pin serves a dual role: it senses output voltage for regulation and also powers the internal 5V VCC LDO when VOUT exceeds 6.4V–7.2V. This eliminates the need for a separate bias supply in many automotive applications, reducing BOM count and improving efficiency by avoiding linear regulator losses.

How does high-side current sensing improve system accuracy compared to low-side sensing?

High-side sensing via ISEN+/ISEN− avoids ground path interference from shared PGND returns, enabling ±5% current limit accuracy even with noisy chassis grounds. It also allows true output current monitoring during short-circuit events where low-side sensing fails due to collapsed ground potential.

Can the MPQ4263GQVE-0000-AEC1-Z operate without an external USB PD controller?

Yes-it functions as a standalone buck-boost regulator without I²C communication. Default OTP configuration ("0000") enables fixed 140W operation with factory-set VREF, fSW, and protection thresholds. I²C is optional for dynamic reconfiguration during runtime or field updates.

What thermal derating is required for continuous 140W operation?

Continuous 140W requires VIN ≥ 19V and optimized 4-layer PCB layout per EVQ4263-QVE-00A reference design (64mm×64mm, θJA = 20.7°C/W). At TA = 85°C, junction temperature reaches ~145°C-within 150°C limit-but thermal margin shrinks above 125°C ambient; forced airflow or copper thermal pads are recommended.

Is the "-Z" suffix in MPQ4263GQVE-0000-AEC1-Z required for tape-and-reel packaging?

Yes-the "-Z" suffix explicitly denotes tape-and-reel packaging per MPS ordering conventions. Parts without "-Z" are supplied in cut tape or tube. For automated SMT assembly in automotive production lines, "-Z" is mandatory to ensure consistent feeder compatibility and ESD-safe handling.

Does the MPQ4263 support automatic mode transition between buck, boost, and buck-boost?

Yes-its proprietary control logic automatically transitions based on VIN/VOUT ratio: buck-boost mode activates when 0.82 < VIN/VOUT < 1.20; buck mode when VIN/VOUT > 1.20; boost mode when VIN/VOUT < 0.82. No external mode pins or firmware intervention are needed.

What is the purpose of the line drop compensation feature?

Line drop compensation injects a voltage offset into the FB loop proportional to output current (e.g., 100mV at 1A), counteracting IR drop across PCB traces or cables. This ensures regulated voltage is maintained at the load point-not just at the IC's VOUT pin-critical for USB-C applications with long interconnects.