Monolithic Power Systems Inc. MPQ8875AGVE-0000-Z

Overview

MPQ8875AGVE-0000-Z from Monolithic Power Systems is a 36V, 5A, AEC-Q100 Grade 1 qualified, four-switch synchronous buck-boost DC/DC converter with I²C interface. It operates across 2.2V–36V input and delivers 0.5V–30V output in CCM, using proprietary constant-on-time (COT) control to enable seamless buck/boost/buck-boost mode transitions-critical for automotive camera monitor and infotainment power rails where input voltage fluctuates below and above nominal output.

For engineers reviewing the MPQ8875AGVE-0000-Z datasheet, MPQ8875AGVE-0000-Z pinout, MPQ8875AGVE-0000-Z application, or MPQ8875AGVE-0000-Z equivalent, key selection factors include its configurable 200kHz–1MHz switching frequency, I²C-adjustable UVLO/OVP thresholds, spread-spectrum EMI reduction, and integrated 10mΩ/25mΩ MOSFETs enabling high-efficiency operation at 4.5A continuous load in QFN-34 (4mm×5mm) wettable flank package.

Technical Context

The MPQ8875A implements a fully integrated four-switch buck-boost topology with independent high-side and low-side MOSFETs per bridge (10mΩ buck high-side, 25mΩ buck low-side, 10mΩ boost low-side, 25mΩ boost high-side), enabling bidirectional power flow and automatic topology selection based on VIN vs. VOUT. Its COT control loop ensures sub-100ns minimum on/off times and stable regulation across wide input/output ratios without external compensation.

I²C configurability extends to real-time dynamic voltage adjustment with slew-rate control, programmable fault thresholds (input OVP: 11–33V, output OVP: 1.1–1.3×VREF), and thermal shutdown at 150°C–170°C with 25°C–75°C hysteresis. The device supports both FCCM and DCM modes, with cycle-by-cycle current limiting (2–9A peak), reverse current limiting (–2.5A to –4.7A), and smart power-good signaling referenced to internal 0.5V–2.0V VREF.

Key Specifications

Pinout & Package

MPQ8875AGVE-0000-Z is housed in a thermally enhanced QFN-34 (4mm × 5mm) package with wettable flanks for automated optical inspection. The exposed thermal pad (Pin 34) must be soldered to a dedicated PCB thermal plane for optimal heat dissipation (θ_JA = 31°C/W on EV board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5175RGYR and MAX20406AWEA+T, MPQ8875AGVE-0000-Z uniquely combines AEC-Q100 Grade 1 qualification, integrated MOSFETs, I²C-based dynamic configuration, and COT control for glitch-free mode transitions-making it optimal for next-generation automotive camera and sensor power systems demanding compact, robust, and software-defined regulation.

Availability

MPQ8875AGVE-0000-Z is available at Aetrix Electronics and suitable for automotive camera monitor systems, ADAS sensor fusion units, and infotainment head units requiring stable component supply with AEC-Q100 traceability and long-term production support.

Supply support for MPQ8875AGVE-0000-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 over two decades of expertise in DC/DC conversion, motor drivers, and automotive-grade solutions.

The MPQ8875A belongs to MPS's automotive-qualified buck-boost converter product line, designed specifically to replace multi-stage power architectures in camera, radar, and infotainment systems with single-chip, software-configurable, and thermally optimized regulation.

FAQ

What is the minimum input voltage supported by MPQ8875AGVE-0000-Z in low-input mode?

The device supports 2.2V minimum input in low-input mode when VCC ≥ 2.5V, enabling operation during automotive cold-crank events. This is achieved via internal charge pump and optimized gate drive, verified across –40°C to +125°C ambient per AEC-Q100 Grade 1 testing.

How does the I²C interface handle dynamic output voltage adjustment?

MPQ8875AGVE-0000-Z supports real-time VOUT adjustment via I²C register writes, with configurable slew rate (1–100mV/ms) and step interval (20–166.67μs). This allows smooth transitions between multiple operating points-e.g., stepping from 12V to 5V for display backlight dimming without output overshoot.

Can the MPQ8875AGVE-0000-Z operate in forced continuous conduction mode (FCCM) at light loads?

Yes-the device supports both FCCM and DCM modes, selectable via I²C. FCCM maintains constant switching frequency down to zero load, improving EMI predictability and reducing output voltage ripple in noise-sensitive applications like camera analog front-ends.

What thermal performance can be expected on a standard 4-layer PCB?

On a 4-layer 9cm×9cm PCB with 2oz copper (EVQ8875A-VE-00A reference board), θJA is 31°C/W. At 5A load and 12V input, junction temperature rise is ~155°C above ambient-well within the 150°C shutdown threshold when proper thermal pad soldering and airflow are applied.

Is the power-good (PG) signal synchronized to the soft-start completion?

Yes-the PG pin asserts after soft-start completes and VOUT remains within ±6% of target for 30 switching cycles (t_{PG_DELAY}). It de-asserts immediately upon fault detection, providing deterministic power sequencing for downstream MCUs and FPGAs.

Does the MPQ8875AGVE-0000-Z support spread-spectrum modulation with external synchronization?

No-spread-spectrum modulation is only active in free-running mode. When SYNC is configured as an input (synchronized operation), frequency dithering is disabled to maintain lock to the external clock source, preserving timing integrity in multi-converter systems.

How is input over-voltage protection (OVP) configured and what is its response time?

OVP threshold is I²C-configurable from 11V to 33V with ±10% accuracy. Upon detection, the device shuts down within 32–256 switching cycles (t_{OCP_DELAY}) and enters auto-recovery mode after 2–16ms (t_{FLT_REC}), preventing latch-up during transient overvoltages.