Monolithic Power Systems Inc. MPQ2169BGRHE-AEC1-P

Overview

MPQ2169BGRHE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified dual synchronous buck regulator supporting configurable output current of 1.4A/1.4A or 2A/0.8A, 2.7V–6V input range, 0.6V–5.5V output range, and 65µA quiescent current - designed for automotive infotainment and cluster power rails powered by single-cell Li-ion batteries.

For engineers reviewing the MPQ2169BGRHE-AEC1-P datasheet, MPQ2169BGRHE-AEC1-P pinout, MPQ2169BGRHE-AEC1-P application, or MPQ2169BGRHE-AEC1-P equivalent, key selection considerations include dual-channel 100% duty cycle capability, integrated 60mΩ HS-FETs / 25mΩ LS-FETs, external soft-start and tracking, power-good monitoring per channel, and 2.3MHz switching frequency with SYNC input for EMI control.

Technical Context

The MPQ2169BGRHE-AEC1-P implements peak-current-mode control with internal compensation per channel, enabling fast transient response without external loop components. It supports 180° out-of-phase operation to reduce input ripple and includes forced continuous conduction mode (FCCM) for stable light-load regulation.

Each channel features independent enable (EN1/EN2), soft-start (SS1/SS2), feedback (FB1/FB2), and power-good (PG1/PG2) pins, with shared VCC, AGND, PGND1/PGND2, and SYNC functionality. The device integrates dual high-side and low-side MOSFETs using BCD process technology and supports frequency setting via FREQ resistor or external clock synchronization.

Key Specifications

Pinout & Package

MPQ2169BGRHE-AEC1-P is housed in a wettable flank QFN-18 package (2.5mm × 3.5mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and thermal performance in automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.

Compared with TPS65023BRSBR and RTQ2131B-QT, MPQ2169BGRHE-AEC1-P uniquely combines AEC-Q100 Grade 1, 100% duty cycle, per-channel soft-start and power-good, and 180° phase-shifted operation - making it optimal for space-constrained, safety-critical automotive dual-rail systems requiring cold-crank resilience and EMI control.

Availability

MPQ2169BGRHE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, digital clusters, telematics gateways, and portable instrumentation requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MPQ2169BGRHE-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 MPQ2169B belongs to MPS's automotive-grade synchronous buck regulator product line, engineered specifically for demanding automotive subsystems requiring AEC-Q100 compliance, ultra-low IQ, and robust thermal performance in compact packages.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The MPQ2169BGRHE-AEC1-P is rated for continuous operation up to +125°C junction temperature per AEC-Q100 Grade 1. Its thermal shutdown activates at +175°C with 40°C hysteresis, allowing safe recovery at +135°C. For sustained full-load operation, thermal design must ensure θJA ≤ 34.8°C/W on a 4-layer evaluation board to stay within limits.

Can both channels be configured to deliver 2A simultaneously?

No. The MPQ2169BGRHE-AEC1-P supports two fixed output current configurations: either 1.4A/1.4A or 2A/0.8A. This reflects internal FET sizing and thermal constraints - the 2A channel uses larger die area, limiting the second channel to 0.8A to maintain safe junction temperature under simultaneous full load.

How does the 180° out-of-phase operation reduce input capacitance requirements?

By staggering the switch-node transitions, the input current ripple from the two channels cancels partially, reducing total RMS input current by ~30%. This allows designers to use smaller ceramic input capacitors (e.g., two 4.7µF instead of one 22µF) while maintaining equivalent ripple suppression and reliability.

Is external compensation required for stable loop operation?

No. The MPQ2169BGRHE-AEC1-P features fully internal compensation for both channels, eliminating the need for external Type-II or Type-III compensation networks. Stability is guaranteed across all valid output voltages, input ranges, and inductor values specified in the datasheet.

What happens during a short-circuit event on one channel?

Upon detecting VFB < 60% VREF after soft-start completion, the affected channel enters hiccup mode: it disables switching, discharges the SS capacitor, then re-attempts soft-start. The unaffected channel continues normal operation - ensuring partial system functionality remains available during single-rail faults.

Does the SYNC pin support spread-spectrum clocking?

No. The SYNC pin accepts only clean, monotonic rising/falling edges within 0.35–3MHz. Spread-spectrum signals introduce jitter that disrupts the internal PLL lock and may cause frequency instability or increased output ripple. For EMI reduction, use fixed-frequency SYNC or rely on the device's inherent 2.3MHz operation outside the AM band.

How is the wettable flank QFN-18 package verified for automotive solder joint reliability?

The MPQ2169BGRHE-AEC1-P's wettable flank structure enables automated optical inspection (AOI) of solder fillets along all 18 side walls. Combined with AEC-Q200 stress testing (including 1000 thermal cycles −40°C to +125°C), this ensures mechanical integrity and void-free interconnects required for automotive under-hood applications.