Monolithic Power Systems Inc. MPQ8847AGQB-AEC1-P

Overview

MPQ8847AGQB-AEC1-P from Monolithic Power Systems is a 6A, AEC-Q100 Grade 1 qualified synchronous step-down converter with I²C interface, designed for automotive core power delivery. It operates from 2.7V to 6V input, delivers adjustable output from 0.6V to 1.235V in 5mV steps, supports up to 2.2MHz switching frequency, and integrates 40mΩ/22mΩ internal MOSFETs - used in ADAS processor rails where dynamic voltage scaling and thermal robustness are critical.

For engineers reviewing the MPQ8847AGQB-AEC1-P datasheet, MPQ8847AGQB-AEC1-P pinout, MPQ8847AGQB-AEC1-P application, or MPQ8847AGQB-AEC1-P equivalent, key selection considerations include I²C-configurable VOUT slew rate, ±5% output voltage accuracy over temperature, integrated PG indicator with 83–108% fault thresholds, and QFN-14 (2.5mm×3mm) package suitability for space-constrained automotive PCB layouts.

Technical Context

The MPQ8847AGQB-AEC1-P uses constant-frequency hysteretic control architecture to achieve ultra-fast transient response without external compensation, enabling stable operation under rapid load steps typical in automotive SoC cores. Its I²C interface supports up to 3.4Mbps communication, allowing real-time reconfiguration of output voltage, switching frequency (0.85–2.2MHz), and power-save mode selection.

Internal protection includes thermal shutdown at 170°C, cycle-by-cycle over-current detection with 9–12.7A peak high-side limit, and power-good monitoring with programmable UV/OV thresholds referenced to actual VOUT. The device features separate AGND and GND pins to isolate analog sensing from power return paths, improving regulation accuracy in noisy automotive environments.

Key Specifications

Pinout & Package

MPQ8847AGQB-AEC1-P is housed in a thermally enhanced QFN-14 package (2.5mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; top view orientation follows standard JEDEC QFN layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with TPS628641ARGTR and RTQ2134BGQW, MPQ8847AGQB-AEC1-P uniquely combines AEC-Q100 Grade 1 operation, 6A capability, 3.4Mbps I²C, and asymmetric PG fault thresholds - making it the only choice for safety-critical automotive core supplies requiring field-programmable voltage margins.

Availability

MPQ8847AGQB-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.

Supply support for MPQ8847AGQB-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 MPQ8847A product line targets automotive power delivery applications demanding high integration, I²C configurability, and AEC-Q100 compliance - specifically engineered for next-generation ADAS, infotainment, and vehicle connectivity platforms.

FAQ

What is the minimum recommended input capacitance for MPQ8847AGQB-AEC1-P?

The datasheet specifies a minimum 22µF ceramic input capacitor placed as close as possible to VIN and GND pins. For robust cold-crank performance, a parallel combination of 22µF X7R ceramic + 100µF tantalum is recommended to maintain ≥2.7V during 100ms dips.

Does MPQ8847AGQB-AEC1-P support forced PWM mode?

No - the device operates exclusively in hysteretic mode with automatic transition between PFM (light load) and FCCM (heavy load). There is no user-selectable forced PWM mode; frequency varies dynamically within the configured 0.85–2.2MHz band based on load and input conditions.

Can the VOUT pin be used with an external resistor divider for feedback?

No - the VOUT pin is a dedicated analog sense input that connects directly to the output rail. External resistor dividers are prohibited; output voltage is set solely via I²C register writes to the internal 7-bit DAC, ensuring ±0.5% accuracy without external component tolerance errors.

How is thermal performance validated for AEC-Q100 Grade 1 compliance?

Thermal validation includes 1,000-hour high-temperature operating life (HTOL) testing at 125°C junction temperature, plus thermal cycling (-40°C to +125°C, 1,000 cycles) and package moisture sensitivity level (MSL) 1 qualification per J-STD-020 - all performed on production lots with full traceability.

What I²C address does MPQ8847AGQB-AEC1-P use by default?

The default 7-bit I²C address is 0x60 (0b1100000), with no address pins - all devices on a bus share this address. For multi-device configurations, external GPIO-controlled multiplexers or separate I²C buses are required since address modification is not supported.

Is the PG pin actively driven or open-drain?

The PG pin is strictly open-drain with no internal pull-up. It requires an external pull-up resistor (typically 10kΩ–100kΩ) to a voltage ≤6V. When asserted, it sinks ≥3mA at 0.4V; when inactive, leakage is ≤1μA - enabling direct interfacing with 3.3V or 5V microcontroller GPIOs.

What is the maximum allowable PCB trace length between SW and the inductor?

SW trace length should be kept under 3mm with ≥0.3mm width and direct connection to inductor pad. Longer traces increase parasitic inductance, causing voltage overshoot (>8V) at SW node during turn-off - verified in MPS EVQ8847A-QB-00A evaluation board layout guidelines.