Monolithic Power Systems Inc. MPQ2167BGDE-AEC1-P

Overview

MPQ2167BGDE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified synchronous buck converter delivering up to 4A continuous output current, operating from 2.7V–6.0V input, regulating down to 0.606V, with configurable switching frequency (300kHz–2.2MHz), and integrated 35mΩ/25mΩ MOSFETs - deployed in automotive infotainment power rails.

For engineers reviewing the MPQ2167BGDE-AEC1-P datasheet, MPQ2167BGDE-AEC1-P pinout, MPQ2167BGDE-AEC1-P application, or MPQ2167BGDE-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, selectable AAM/FCCM light-load modes, internal compensation, wettable flank QFN-11 package, and cycle-by-cycle over-current protection with valley detection.

Technical Context

The MPQ2167BGDE-AEC1-P uses peak-current-mode control with internal compensation for fast transient response and inherent cycle-by-cycle current limiting. Its dual-mode operation-advanced asynchronous mode (AAM) below 0.4V on MODE pin and forced continuous conduction mode (FCCM) above 1.2V-enables efficiency optimization across load ranges.

It integrates a high-side MOSFET (35mΩ typ), low-side synchronous rectifier (25mΩ typ), 100% duty-cycle capability, and robust protection including thermal shutdown (170°C trip), output over-voltage (115% of VFB), short-circuit recovery, and VIN UVLO (2.5V rising threshold with 350mV hysteresis).

Key Specifications

Pinout & Package

MPQ2167BGDE-AEC1-P is housed in a wettable flank QFN-11 package (2mm × 3mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and solder joint reliability in automotive assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with TPS6286418RTER and RTQ2134BGQW, MPQ2167BGDE-AEC1-P uniquely combines AEC-Q100 Grade-1, wettable flank QFN, AAM/FCCM selection, and internal compensation - making it the only option qualified for safety-critical automotive domains requiring both reliability and design flexibility.

Availability

MPQ2167BGDE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and telematics systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MPQ2167BGDE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ2167B product line targets automotive-grade DC-DC conversion for ADAS, infotainment, and body electronics - engineered for AEC-Q100 compliance, high efficiency at light loads, and minimal external component count.

FAQ

What is the minimum recommended output capacitor for stable operation?

The MPQ2167BGDE-AEC1-P is characterized with 44µF total output capacitance (e.g., four 10µF X5R 0603 MLCCs). Minimum stable value is 22µF using low-ESR ceramic capacitors; lower values risk instability in FCCM mode due to reduced phase margin.

Does the device support 100% duty cycle operation, and under what conditions?

Yes - MPQ2167BGDE-AEC1-P supports true 100% duty cycle when VOUT ≥ 0.9 × VIN and the MODE pin is set to FCCM. This enables dropout operation during cold-crank events where VIN drops near VOUT, maintaining regulation without discontinuity.

How does the valley current limit protect against inductor saturation?

The valley current limit (4.7A typ) triggers at the start of each switching cycle when the low-side MOSFET turns on. By detecting current at the inductor's minimum point, it prevents cumulative current buildup that could saturate the inductor during overload or short-circuit conditions.

Can the SYNCO pin drive another MPQ2167B in master-slave configuration?

Yes - SYNCO outputs a 180° phase-shifted clock synchronized to the internal oscillator. When driving a second MPQ2167B's FREQ/SYNC pin, it enables interleaved operation, reducing input/output ripple and thermal stress across both converters.

What is the thermal resistance (θJA) for the QFN-11 package on a 4-layer PCB?

Measured per JESD51-7 on a 4-layer PCB, θJA is 70°C/W. On MPS's EV2167B-D-00A evaluation board (6.35cm × 6.35cm, 4-layer), θJA improves to 42°C/W - confirming effective thermal design with adequate copper pour and thermal vias under the exposed pad.

Is the FB voltage reference trimmed across temperature, and what is its drift?

Yes - the 0.606V reference is trimmed at 25°C and exhibits ±15mV (±2.5%) variation over −40°C to +125°C, as specified in the Electrical Characteristics table (0.591V to 0.621V). This ensures accurate regulation across full automotive temperature range.

How does the PG signal behave during thermal shutdown?

During thermal shutdown, PG remains asserted high until VFB falls outside the ±15% window (i.e., VFB < 0.515V or > 0.707V). Since thermal shutdown occurs at TJ = 170°C but regulation is maintained until thermal foldback begins, PG stays valid as a functional rail monitor even during thermal events.