Monolithic Power Systems Inc. MPQ4272GVE-0011-AEC1-P

Overview

MPQ4272GVE-0011-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 dual-channel synchronous buck converter IC for automotive USB Type-C power delivery, delivering up to 3A per channel across 4V–36V input and 1V–21V programmable output (12.6mV resolution), with I²C interface, OTP memory, and integrated 22mΩ/26mΩ MOSFETs in QFN-21 (4mm×5mm) wettable flanks package.

For engineers reviewing the MPQ4272GVE-0011-AEC1-P datasheet, MPQ4272GVE-0011-AEC1-P pinout, MPQ4272GVE-0011-AEC1-P application, or MPQ4272GVE-0011-AEC1-P equivalent, this device supports USB PD 3.0 compliance, dual-port independent voltage/current configuration via I²C, and automotive-grade fault protection including OVP, thermal shutdown, battery short-to-ground detection, and load-shedding alert.

Technical Context

The MPQ4272GVE-0011-AEC1-P implements two independent peak-current-mode-controlled buck regulators with phase-shifted 250kHz/420kHz/1.1MHz/2.1MHz switching frequencies, frequency spread spectrum, and low-dropout mode. Each channel features dedicated FB pins, BST/SW/GATE terminals, and internal high-side/low-side MOSFETs with R_DS(ON) of 22mΩ and 26mΩ respectively.

Its I²C interface enables real-time configuration of output voltage (1V–21V), CC current limit (50mA steps), switching frequency, phase delay, line drop compensation, and PFM/PWM mode selection. The BIAS pin supports efficiency optimization by enabling a secondary LDO powered from VOUT ≥4.8V, while the ALT pin provides PMBus-compatible open-drain alert signaling.

Key Specifications

Pinout & Package

MPQ4272GVE-0011-AEC1-P is housed in a thermally enhanced QFN-21 (4mm × 5mm) package with wettable flanks, optimized for automotive PCB assembly and thermal dissipation (θ_JA = 44°C/W on standard 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-buck automotive power delivery applications.

Compared with MPQ4272GVE-0011-AEC1-P, the 0000 variant offers plug-and-play simplicity but lacks runtime adaptability, while the 0001 variant trades configurability for faster integration in fixed-role deployments-making the 0011 optimal for platforms requiring dynamic voltage negotiation and multi-vehicle software-defined power policies.

Availability

MPQ4272GVE-0011-AEC1-P is available at Aetrix Electronics and suitable for automotive USB-C charging hubs, ADAS camera modules, infotainment display backlights, and telematics control units requiring stable component supply with AEC-Q100 Grade 1 qualification and full traceability.

Supply support for MPQ4272GVE-0011-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 20 years of leadership in DC/DC conversion, motor drivers, and automotive-grade solutions.

The MPQ4272 product line is designed specifically for automotive USB power delivery systems, integrating dual-buck regulation, I²C configurability, and AEC-Q100-compliant protection to replace discrete PD controller + dual buck implementations in next-generation vehicle architectures.

FAQ

What is the function of the BIAS pin on MPQ4272GVE-0011-AEC1-P?

The BIAS pin accepts an external 4.8V–30V supply (e.g., from VOUT) to enable a secondary internal LDO, which powers the IC instead of the primary VIN-fed LDO. This reduces quiescent current and improves system efficiency-especially critical in always-on automotive modules where standby power must stay below 50μA.

How does the ISENS pin provide battery short-to-ground protection?

The ISENS pin monitors voltage across a sense resistor in the ground path of the external isolation FET. When current exceeds ~160mV (corresponding to ~3.6A at 45mΩ), the IC disables GATEG and shuts down both buck channels within 20μs, physically disconnecting the load from battery to prevent thermal runaway in wiring faults.

Can MPQ4272GVE-0011-AEC1-P operate with only one channel enabled?

Yes-the IC supports independent channel enable/disable via I²C commands. Channel 1 can be active while Channel 2 remains in shutdown (quiescent current <5μA), allowing asymmetric power delivery for mixed-load applications like USB-C + USB-A ports or primary/backup rails.

What is the purpose of the ALT pin, and how is it used in system design?

The ALT pin is an open-drain PMBus-compatible alert output that pulls low during OVP, thermal shutdown, overcurrent, or communication errors. It connects directly to a microcontroller's interrupt pin, enabling real-time fault logging and graceful system response-such as disabling USB ports before entering limp-home mode.

Does MPQ4272GVE-0011-AEC1-P support USB PD 3.0 specification compliance?

Yes-the device implements all mandatory PD 3.0 physical layer functions via its I²C interface, including programmable VOUT (1V–21V), precise CC current limit (±5% accuracy), and fast voltage transition (<1ms). However, full PD 3.0 compliance requires pairing with a certified USB PD controller (e.g., MPS MPQ4257) for BMC protocol handling.

What thermal derating applies to MPQ4272GVE-0011-AEC1-P at 105°C ambient?

At T_A = 105°C, maximum continuous output current per channel drops to ~2.2A (derated from 3A) due to thermal limits-calculated using θ_JA = 44°C/W and T_J(MAX) = 150°C. Layout enhancements (2oz copper, thermal vias under EPAD) can recover ~0.5A additional headroom.

Is the OTP memory in MPQ4272GVE-0011-AEC1-P reprogrammable after soldering?

No-the OTP (one-time programmable) memory is laser-fused during final test and cannot be rewritten in-system or post-soldering. Configuration changes require ordering a new part number (e.g., MPQ4272GVE-0012-AEC1-P) with updated OTP contents generated via MPS's configuration tool and FAE support.