Monolithic Power Systems Inc. MPQ4272GVE-0000-AEC1-P

Overview

MPQ4272GVE-0000-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, integrating two 3A monolithic DC/DC regulators with I²C/PMBus interface, 4V–36V input range, 1V–21V programmable output range (12.6mV resolution), and on-chip 22mΩ/26mΩ MOSFETs. It supports USB PD 3.0 in dual-port charger designs with VBUS isolation gate drivers and battery short-to-ground protection.

For engineers reviewing the MPQ4272GVE-0000-AEC1-P datasheet, MPQ4272GVE-0000-AEC1-P pinout, MPQ4272GVE-0000-AEC1-P application, or MPQ4272GVE-0000-AEC1-P equivalent, this device delivers configurable CC current limiting (50mA steps), selectable switching frequencies (250/420/1100/2100 kHz), frequency spread spectrum, line drop compensation, and OTP-programmable settings for automotive-grade USB PD supply systems.

Technical Context

The MPQ4272GVE-0000-AEC1-P implements peak-current-mode control per channel with independent error amplifiers, internal 5V VCC LDO (with BIAS-assisted efficiency boost), and phase-shifted PWM clocks to reduce input ripple. Its dual-buck architecture supports either independent 3A outputs or shared 6A operation via I²C-coordinated sequencing.

It integrates dedicated analog blocks for real-time current sensing (ISENS), over-voltage protection (114–125% trip), thermal shutdown (170°C), and PMBus-compatible register access for VOUT, frequency, phase delay, and load-line compensation-enabling closed-loop USB PD compliance without external controllers.

Key Specifications

Pinout & Package

MPQ4272GVE-0000-AEC1-P is housed in a wettable-flank QFN-21 (4mm × 5mm) package optimized for automotive reflow inspection and thermal performance (θ_JA = 44°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4272GVE-0000-AEC1-P, MPQ4252GDE-AEC1-Z sacrifices channel count and isolation control for smaller footprint, while TPS65987DMLR adds protocol stack complexity at the cost of automotive temperature range and direct analog configurability.

Availability

MPQ4272GVE-0000-AEC1-P is available at Aetrix Electronics and suitable for automotive USB-C charging hubs, ADAS camera power supplies, infotainment system DC/DC cores, and telematics control unit (TCU) power rails requiring stable component supply under AEC-Q100 Grade 1 qualification.

Supply support for MPQ4272GVE-0000-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 expertise in DC/DC conversion, motor drivers, and automotive-grade solutions.

The MPQ4272 product line targets automotive USB power delivery systems requiring AEC-Q100 qualification, I²C configurability, and integrated VBUS isolation - designed to replace discrete buck + PD controller combinations in next-generation vehicle cabins.

FAQ

What is the purpose of the BIAS pin, and how should it be connected?

The BIAS pin powers an auxiliary LDO (LDO2) that improves light-load efficiency when connected to a stable ≥4.8V output rail (e.g., 5V or 9V). When active, it disables the main VIN-powered LDO1. If unused, BIAS must be tied to GND. An RC low-pass filter (e.g., 10kΩ + 100nF) is recommended between output and BIAS to suppress noise.

Does MPQ4272GVE-0000-AEC1-P support USB PD 3.1 Extended Power Range (EPR)?

No. The MPQ4272GVE-0000-AEC1-P supports USB PD 3.0 up to 20V/3A (60W) per port. Its maximum programmable VOUT is 21V, and its internal OVP threshold (120%) caps safe operation at 20V. EPR (28V/36V/48V) requires higher-voltage FETs and different protection architecture not present in this device.

How is thermal performance validated for AEC-Q100 Grade 1 operation?

Thermal shutdown is set at 170°C with 20°C hysteresis, and junction temperature is validated across −40°C to +150°C ambient using JEDEC JESD51-7 test board. The QFN-21 package achieves θ_JA = 44°C/W and θ_JC = 9°C/W, enabling 3A/channel operation at +105°C ambient with proper PCB copper area (≥4 cm² thermal pad).

Can the two buck channels operate at different output voltages and switching frequencies?

Yes. Each channel has independent FB, SW, BST, and GATE pins, and I²C registers allow separate configuration of VOUT, switching frequency, current limit, and phase delay. Channels can be set to 5V/420kHz and 12V/2.1MHz simultaneously, with no hardware interdependence beyond shared VIN and grounds.

What protection features are implemented in hardware versus firmware?

Hardware protections include over-current (HS/LS peak/valley detection), over-voltage (114–125% trip), thermal shutdown (170°C), UVLO (3.35V rising), and EN hysteresis. I²C-accessible features like load-line compensation and frequency spread spectrum are configured in registers but executed in analog hardware - no firmware dependency.

Is the OTP memory field-programmable after soldering?

No. The OTP (one-time programmable) memory is programmed during final test at the factory and cannot be rewritten in-system. The "0000" suffix indicates default register values; custom configurations require pre-ordering MPQ4272GVE-xxxx-AEC1 with unique hex code generated by MPS FAE support.

What is the minimum off-time specification, and why does it matter for high-input applications?

The minimum off-time is 100ns. At high input voltages (e.g., 36V → 5V), duty cycle drops below 14%, making minimum off-time a limiting factor for stable operation. This spec ensures reliable regulation down to D_MIN ≈ 0.03 at 2.1MHz, enabling full 4V–36V range coverage without pulse-skipping artifacts.