Monolithic Power Systems Inc. MPQ4263GQVE-0001-AEC1-Z

Overview

MPQ4263GQVE-0001-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 automotive 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 across 3.6V–36V input and 1V–36V output ranges, supports USB PD 3.1 EPR/PPS, and operates at selectable 280/420/580kHz switching frequencies - optimized for 60W USB PD charging ports using its factory-programmed 420kHz configuration.

For engineers reviewing the MPQ4263GQVE-0001-AEC1-Z datasheet, MPQ4263GQVE-0001-AEC1-Z pinout, MPQ4263GQVE-0001-AEC1-Z application, or MPQ4263GQVE-0001-AEC1-Z equivalent, this device requires attention to HS current-sense resistor placement (ISEN+/ISEN−), bootstrap capacitor sizing (BST1/BST2), I²C register configuration for VREF and OVP trim, and thermal layout on QFN-20 wettable flank package for automotive-grade reliability.

Technical Context

The MPQ4263GQVE-0001-AEC1-Z implements a fixed-frequency buck-boost topology with seamless mode transitions between buck, boost, and buck-boost regions, governed by VIN/VOUT ratio thresholds (120% buck-boost-to-buck, 82% buck-boost-to-boost). Its dual high-side gate drivers (HG1/HG2) support external high-side MOSFETs, while integrated LS-FETs handle synchronous rectification.

Control is executed via a PLL-based oscillator with ±8% frequency dithering, error amplifier with programmable reference (0.1V–2.147V), and dedicated CC current limit circuitry achieving ±5% accuracy using high-side sensing. The I²C interface enables real-time readback of IMON, fault status, and OTP-configured parameters including VREF, OVP trim, and fSW selection.

Key Specifications

Pinout & Package

MPQ4263GQVE-0001-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 manufacturing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4263GQVE-0001-AEC1-Z, MPQ4269GQVE-AEC1-Z offers greater power capacity but lacks I²C configurability, while LM5175QRGERQ1 provides full discrete control at the expense of integration and USB PD feature support - making the MPQ4263 optimal for compact, standards-compliant 60W automotive USB PD implementations.

Availability

MPQ4263GQVE-0001-AEC1-Z is available at Aetrix Electronics and suitable for USB PD charging ports, automotive infotainment power supplies, and wireless charging transmitters requiring stable component supply with AEC-Q100 Grade 1 assurance and production-ready I²C configuration.

Supply support for MPQ4263GQVE-0001-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ4263 belongs to MPS's automotive-qualified buck-boost converter product line, designed specifically to meet stringent USB PD 3.1 EPR/PPS requirements and AEC-Q100 reliability standards for next-generation in-vehicle power delivery.

FAQ

What is the purpose of the ISEN+ and ISEN− pins?

ISEN+ and ISEN− form a differential input for high-side current sensing across an external sense resistor (RSENS). This enables ±5% accurate constant-current (CC) limiting independent of MOSFET RDS(on) variations, critical for USB PD compliance and robust overcurrent protection in automotive environments.

How does the VCC pin function, and when does it activate?

The VCC pin outputs a regulated 5V supply derived from the internal LDO. It activates automatically when VOUT exceeds 6.4V (VCC_VTH), eliminating the need for an external bias supply. Below that threshold, VCC must be externally powered - a key design consideration for low-VOUT USB PD startup sequences.

Can MPQ4263GQVE-0001-AEC1-Z support USB PD 3.1 Extended Power Range (EPR)?

Yes - its 1V–36V output range, I²C-configurable VREF (0.1V–2.147V), and ±5% CC accuracy meet USB PD 3.1 EPR and PPS specifications. The factory-programmed 420kHz switching frequency and OTP-locked registers ensure consistent 60W operation without runtime reconfiguration.

What thermal considerations apply to the QFN-20 package?

The QFN-20 (3mm×5mm) package has θJA = 9.1°C/W on a standard JEDEC board. For automotive use, thermal design must account for ambient temperatures up to +105°C and include exposed thermal pad soldering, multiple vias to inner ground planes, and adequate copper area to sustain 140W peak power without exceeding 150°C junction temperature.

How does the ALT pin behave during fault conditions?

The ALT pin is an open-drain, active-low interrupt output that asserts low during OVP, OCP, or thermal shutdown events. It remains latched until cleared via I²C register write or power cycle, providing reliable fault signaling to host microcontrollers without requiring continuous polling.

Is the 420kHz switching frequency user-modifiable on MPQ4263GQVE-0001-AEC1-Z?

No - the "0001" suffix indicates factory OTP programming for 420kHz operation. While the MPQ4263 supports 280/420/580kHz selection via I²C, the OTP lock prevents runtime changes on this variant, ensuring deterministic EMI behavior and simplified qualification for automotive USB PD applications.

What is the role of the BST1 and BST2 pins, and what capacitor value is required?

BST1 and BST2 provide floating gate drive supplies for HG1 and HG2 high-side drivers. Each requires a 0.22μF X7R ceramic capacitor connected between the respective BST pin and its associated switch node (SW1 or SW2) to sustain gate voltage during high-side conduction cycles.