Monolithic Power Systems Inc. MPQ4487AGU-FD2-AEC1-Z

Overview

MPQ4487AGU-FD2-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous buck converter with dual integrated USB Type-C 5V/3A charging ports, 6V–36V input range, 250kHz fundamental switching frequency with ±10% spread spectrum, and independent EN/FLT control per port - designed for automotive infotainment and center console power delivery.

For engineers reviewing the MPQ4487AGU-FD2-AEC1-Z datasheet, MPQ4487AGU-FD2-AEC1-Z pinout, MPQ4487AGU-FD2-AEC1-Z application, or MPQ4487AGU-FD2-AEC1-Z equivalent, key selection criteria include its QFN-26 (5mm×5mm) package, dual-channel hiccup-protected USB current limiting, programmable output voltage (5.10V/5.17V/5.30V), and AEC-100 thermal robustness up to +125°C junction temperature.

Technical Context

The MPQ4487AGU-FD2-AEC1-Z implements a fixed-frequency, peak-current-mode synchronous buck regulator with internal 18mΩ/15mΩ HS/LS MOSFETs and dual USB power switches (18mΩ each), supporting automatic Type-C DFP mode detection via CC1/CC2/CC3/CC4 pins. It integrates line-drop compensation, soft-start (2ms), and VCC LDO regulation from VIN.

Its dedicated fault management includes open-drain FLT1/FLT2 outputs with 3ms deglitching for over-current and over-temperature events on each USB channel, while EN1/EN2 enable independent port control with internal 1MΩ pull-down resistors. The FREQ pin supports resistor-programmed switching frequencies (250kHz–2.2MHz) or spread-spectrum operation at 250kHz ±10% when floating or tied to VCC.

Key Specifications

Pinout & Package

MPQ4487AGU-FD2-AEC1-Z is housed in a thermally enhanced QFN-26 (5mm × 5mm, 0.5mm pitch) package with exposed thermal pad, optimized for automotive PCB layouts requiring high power density and low θ_JA (20°C/W on 50mm×50mm 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4487AGU-FD-AEC1-Z and MPQ4487AGU-AEC1-Z, the MPQ4487AGU-FD2-AEC1-Z provides optimal balance of low-frequency EMI suppression, thermal headroom at high input voltages, and simplified frequency configuration - making it the preferred choice for 36V-rated automotive charging systems.

Availability

MPQ4487AGU-FD2-AEC1-Z is available at Aetrix Electronics and suitable for automotive center console power delivery, infotainment head unit USB subsystems, and telematics gateway charging interfaces requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for MPQ4487AGU-FD2-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-efficiency power management ICs for automotive, industrial, and consumer applications, with design centers in the US, China, and Taiwan.

The MPQ4487A product line delivers integrated DC/DC + USB power solutions targeting automotive USB-C charging ports, eliminating discrete buck converters and USB switches while meeting AEC-Q100 Grade 1 reliability standards.

FAQ

What is the purpose of the CC1–CC4 pins on the MPQ4487AGU-FD2-AEC1-Z?

The CC1–CC4 pins implement USB Type-C configuration channel detection: CC1/CC2 monitor USB1 cable attachment and negotiate VCONN sourcing, while CC3/CC4 perform identical functions for USB2. They enable fully autonomous DFP (downstream-facing port) mode without MCU involvement, supporting 5V/3A power delivery out-of-box.

How does the frequency spread spectrum function work on this part?

When FREQ is left floating or tied to VCC, the MPQ4487AGU-FD2-AEC1-Z modulates its 250kHz fundamental switching frequency with a ±10% triangular dither at 4kHz. This spreads energy across a 45kHz bandwidth, reducing peak radiated emissions by up to 12dB - critical for passing CISPR-25 Class 5 automotive EMC tests.

Can the output voltage be adjusted, and how is it set?

Yes, V_OUT is selectable via the OUT_SEL pin: pulling it low sets 5.10V, leaving it floating selects 5.17V (default), and driving it high configures 5.30V. This allows precise compensation for PCB trace IR drop - for example, 5.30V at the IC output ensures ≥5.10V at the USB connector under 3A load.

What protection features are included for the USB ports?

Each USB port includes hiccup-mode over-current protection (trip at ~5A), over-voltage clamping (5.8V), thermal foldback starting at 135°C, and open-drain FLTx fault indication with 3ms deglitching. These operate independently per port, ensuring one shorted device does not disable the other.

Is external compensation required for the buck converter?

No - the MPQ4487AGU-FD2-AEC1-Z integrates a fully compensated error amplifier with optimized internal network. Only standard external components are needed: input capacitor (≥100µF), output bulk capacitor (≥270µF), output ceramic capacitor (≥10µF), inductor (4.7µH), and bootstrap capacitor (220nF).

What is the minimum input voltage required to start the converter?

The under-voltage lockout (UVLO) rising threshold is 5.0V (typical), with 800mV hysteresis. The IC remains disabled until VIN exceeds 5.0V; it shuts down when VIN falls below 4.2V. This ensures reliable startup during automotive cold-crank conditions down to 6V battery voltage.

How is thermal performance validated for automotive use?

The device is qualified to AEC-Q100 Grade 1 (–40°C to +125°C T_J) and features a 165°C thermal shutdown with 20°C hysteresis. Thermal imaging data shows <40°C rise at 6A total load on a 50mm×50mm 4-layer PCB, confirming suitability for sealed automotive enclosures.