Monolithic Power Systems Inc. MPQ2167GD-AEC1-P

Overview

MPQ2167GD-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 programmable switching frequency (300kHz–2.2MHz), and integrating 35mΩ/25mΩ internal MOSFETs - designed for automotive infotainment power rails.

For engineers reviewing the MPQ2167GD-AEC1-P datasheet, MPQ2167GD-AEC1-P pinout, MPQ2167GD-AEC1-P application, or MPQ2167GD-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, valley-current-based over-current protection, selectable AAM/FCCM light-load modes, 42μA quiescent current, and QFN-11 (2mm × 3mm) thermal performance in automotive ambient ranges (−40°C to +125°C).

Technical Context

The MPQ2167GD-AEC1-P employs peak-current-mode control with internal compensation, enabling fast transient response without external loop components. Its dual-mode operation-advanced asynchronous mode (AAM) below 0.4V on MODE pin and forced continuous conduction mode (FCCM) above 1.2V-directly governs efficiency vs. ripple trade-offs at light load.

It integrates valley-current detection for cycle-by-cycle OCP, 180° phase-shifted SYNCO output for multi-phase synchronization, and a 100% duty-cycle capability for ultra-low dropout operation. The PG open-drain indicator uses ±15% FB voltage window with 5% hysteresis and 40–180μs delay for reliable power sequencing.

Key Specifications

Pinout & Package

MPQ2167GD-AEC1-P is housed in a thermally enhanced QFN-11 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad for efficient heat dissipation in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ2169GJ-AEC1-P, the MPQ2167GD-AEC1-P offers smaller footprint and lower IQ for space- and battery-constrained modules; versus TPS6286418RTER, it delivers superior junction temperature rating and synchronization for multi-rail EMI reduction - making it the optimal choice for Grade-1 front-end power in compact automotive electronics.

Availability

MPQ2167GD-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, digital clusters, and telematics systems requiring stable component supply with AEC-Q100 compliance and long-term production continuity.

Supply support for MPQ2167GD-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ2167 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for ASIL-B–capable power management in infotainment, cluster, and telematics ECUs - emphasizing thermal robustness, functional safety features, and AEC-Q100 Grade-1 validation.

FAQ

What is the maximum allowable input voltage for MPQ2167GD-AEC1-P?

The absolute maximum rated input voltage is +6.5V, but the recommended continuous operating range is 2.7V to 6.0V. Exceeding 6.0V may trigger overvoltage protection or cause permanent damage, especially during load dump transients. For automotive 12V systems, ensure upstream TVS or LDO clamping limits VIN to ≤6.0V at the MPQ2167 input pin.

How does the MODE pin affect efficiency and output ripple?

When MODE is pulled low (<0.4V), the device enters Advanced Asynchronous Mode (AAM), reducing switching frequency under light load to cut switching losses - achieving up to 88% efficiency at 10mA. When pulled high (>1.2V), Forced Continuous Conduction Mode (FCCM) maintains fixed frequency, yielding lower output ripple (<10mVpp) but higher light-load IQ (~120μA).

Can MPQ2167GD-AEC1-P safely start up into a pre-biased output?

Yes. The MPQ2167GD-AEC1-P supports pre-bias start-up: if VFB > VSS at enable, both high-side and low-side FETs remain off until VSS rises above VFB. This prevents reverse current flow through the inductor and avoids output voltage collapse or overshoot - critical for hot-swap and multi-rail sequencing applications.

What thermal derating applies at 125°C ambient?

At TA = +125°C, the maximum continuous output current is reduced to ~2.8A due to thermal limits. With θJA = 70°C/W on a 4-layer board, PD(max) = (150°C − 125°C)/70°C/W ≈ 0.357W. Given typical 85% efficiency at 3.3V→1.8V, this corresponds to ~2.8A at 1.8V output. Layout enhancements (thermal vias, copper area) improve this margin.

Is the SYNCO output compatible with other MPS buck converters?

Yes. The SYNCO pin outputs a 180° phase-shifted version of the internal oscillator clock and is electrically compatible with SYNCO inputs of other MPS buck regulators (e.g., MPQ2169, MPQ2171). This enables deterministic interleaving for input ripple cancellation without external clock generators or complex timing alignment.

Does the PG signal indicate overvoltage or undervoltage faults independently?

No. PG asserts high only when FB voltage is within ±15% of 0.606V - it reflects combined regulation status. Separate OV and UV faults (e.g., VOUT > 115% VFB or VIN < 2.3V) cause PG to deassert, but the pin does not distinguish between them. Fault isolation requires monitoring EN, VIN, and FB externally or using dedicated supervisor ICs.

What is the minimum recommended output capacitance?

The datasheet specifies stable operation with ≥22μF total output capacitance (e.g., two 10μF X5R ceramics + 2.2μF tantalum). Lower values risk instability or excessive ripple, especially at 2.2MHz. ESR should be ≤5mΩ; use low-ESR MLCCs placed adjacent to SW and PGND pins to maintain loop integrity.