Monolithic Power Systems Inc. MPQ4488BGU-AEC1-P

Overview

MPQ4488BGU-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter with dual integrated USB charging ports, delivering up to 6A buck output and 3A per USB port. It supports BC1.2, Apple 3A Divider, 1.2V/1.2V, and USB Type-C 5V@3A DFP modes, and features programmable 250kHz–2.2MHz switching frequency, 18mΩ/15mΩ internal buck MOSFETs, and 100mV line drop compensation - deployed in automotive infotainment power supplies and telematics head units.

For engineers reviewing the MPQ4488BGU-AEC1-P datasheet, MPQ4488BGU-AEC1-P pinout, MPQ4488BGU-AEC1-P application, or MPQ4488BGU-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, dual-USB auto-detection compliance (BC1.2, Type-C TID 3133), adjustable 5.1V/5.17V/5.3V output, hiccup current limiting for buck and USB paths, and QFN-26 thermal performance under 125°C junction operation.

Technical Context

The MPQ4488BGU-AEC1-P implements fixed-frequency peak-current-mode control with internal 4.6V VCC LDO biasing, bootstrap gate drive for high-side FET, and dual independent USB port identification logic supporting Type-C CC1/CC2/CC3/CC4 channel detection and VCONN sourcing. Its error amplifier uses internal compensation to minimize external components.

It integrates two independent USB current-limit switches with 18mΩ R_DS(ON), programmable load-shedding entry at +135°C, and dedicated OVP clamping (5.45–6.25V) on buck output plus separate 5.3–6.0V clamping per USB port. The FREQ pin enables resistor-programmed switching frequency without spread spectrum - distinguishing it from the FD variant.

Key Specifications

Pinout & Package

MPQ4488BGU-AEC1-P is housed in a thermally enhanced QFN-26 (5mm × 5mm, 0.5mm pitch) package with exposed thermal pad, optimized for automotive PCB layouts requiring low θ_JA (20°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4488BGU-FD-AEC1-P, the -AEC1-P offers lower EMI test risk in pre-spread-spectrum environments and identical thermal performance; versus NCP81239MNTXG, it reduces component count by 5+ devices and simplifies USB certification but locks protocol support to BC1.2/Type-C 5V@3A.

Availability

MPQ4488BGU-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment head units, telematics control units, and ADAS display systems requiring stable component supply with AEC-Q100 qualification and long-term production continuity.

Supply support for MPQ4488BGU-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 core expertise in DC/DC conversion, motor drivers, and battery management solutions.

The MPQ4488B product line targets automotive USB power delivery applications, integrating buck regulation, USB port identification, and robust protection into a single AEC-Q100-qualified device to simplify in-vehicle charging architecture.

FAQ

What USB charging standards does MPQ4488BGU-AEC1-P support?

It natively supports USB Battery Charging Specification v1.2 (BC1.2) DCP mode, Apple 3A Divider mode, 1.2V/1.2V handshake, and USB Type-C 5V @ 3A Downstream Facing Port (DFP) mode. It passes USB-IF Type-C certification (TID: 3133) and Apple MFI R33 testing - no external ID IC or firmware is needed.

Does MPQ4488BGU-AEC1-P include spread spectrum frequency modulation?

No. The -AEC1-P variant lacks frequency spread spectrum; that feature is exclusive to the MPQ4488BGU-FD-AEC1-P version. When FREQ is floated or tied to VCC on the -AEC1-P, it operates at a fixed 450kHz (±10%) without modulation - confirmed in the DEVICE COMPARISON table on page 3 of the datasheet.

How is output voltage selected on MPQ4488BGU-AEC1-P?

Voltage is set by the logic state of the OUT_SEL pin: pulled low → 5.10V (−2%/+2%), floating → 5.17V (−1%/+1% at 25°C), pulled high → 5.30V (−2%/+2%). This adjusts the internal feedback divider ratio, eliminating external resistors and enabling simple hardware configuration.

What is the maximum continuous USB output current per port?

Each USB port delivers up to 3A continuously, with accurate ±6% current limiting (3.55A typ.) and hiccup-mode recovery on overcurrent. The buck stage supplies up to 6A total, allowing simultaneous 3A/3A operation - verified in efficiency curves and thermal imaging data at 12V_IN.

Is MPQ4488BGU-AEC1-P compatible with USB Type-C E-Marker cables?

No. It operates strictly as a 5V DFP (Downstream Facing Port) and does not implement USB Power Delivery (PD) negotiation or E-Marker communication. It supports only legacy Type-C 5V@3A mode using CC1/CC2 detection - confirmed in the USB Type-C section (page 9) and functional block diagram.

What thermal derating applies above 125°C junction temperature?

The datasheet specifies guaranteed operation up to +125°C junction temperature. Operation above this requires consultation with MPS; thermal shutdown triggers at 165°C with 20°C hysteresis, and load-shedding begins at +135°C - both are hard silicon limits, not configurable thresholds.

Can MPQ4488BGU-AEC1-P be used in non-automotive applications?

Yes - its 6–36V input, 6A output, and USB features are technically applicable to industrial docking stations or medical portable chargers. However, AEC-Q100 qualification adds cost and screening not required outside automotive; for non-automotive use, the commercial-grade MPQ4488B may be more cost-effective.