Monolithic Power Systems Inc. MPQ4415AGQBE-AEC1-P

Overview

MPQ4415AGQBE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 1.5A continuous output current across a 4V–36V input range. It integrates 90mΩ high-side and 50mΩ low-side MOSFETs, operates at a default 2.2MHz switching frequency with 450kHz–2.2MHz synchronization capability, and features power-good (PG) indication, valley-current OCP with hiccup mode, and internal soft-start - deployed in automotive infotainment power rails.

For engineers reviewing the MPQ4415AGQBE-AEC1-P datasheet, MPQ4415AGQBE-AEC1-P pinout, MPQ4415AGQBE-AEC1-P application, or MPQ4415AGQBE-AEC1-P equivalent, key selection criteria include its wettable-flank QFN-13 package for automated optical inspection, CISPR25 Class 5 EMI compliance, forced CCM operation for stable light-load ripple, thermal shutdown at 170°C, and feedback reference accuracy of ±1.5% over –40°C to +125°C.

Technical Context

The MPQ4415AGQBE-AEC1-P employs peak-current-mode control with internal compensation, enabling fixed-frequency regulation while maintaining stability across wide VIN and VOUT ranges. Its valley-current detection OCP and hiccup recovery mechanism prevent thermal runaway during sustained overload or short-circuit conditions.

It integrates a bootstrap regulator with 2.2V UVLO and 150mV hysteresis for high-side gate drive, supports external clock synchronization up to 2.2MHz with sub-350ns pulse width tolerance, and uses a dedicated AGND/PGND separation scheme with internal connection to minimize noise coupling in sensitive analog feedback paths.

Key Specifications

Pinout & Package

MPQ4415AGQBE-AEC1-P is housed in a wettable-flank QFN-13 package (2.5mm × 3mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and solder-joint reliability in automotive reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4415AGQBE-AEC1-P, MPQ4420AGQ-AEC1-Z trades wettable-flank reliability for higher current, while TPS54340QDDARQ1 offers greater input flexibility and output capability at the cost of package size and missing PG functionality critical for automotive boot integrity.

Availability

MPQ4415AGQBE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply with full AEC-Q100 Grade 1 traceability and PPAP documentation support.

Supply support for MPQ4415AGQBE-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 distribution through authorized partners.

The MPQ4415A product line delivers compact, AEC-Q100-qualified DC/DC converters targeting automotive subsystems where space, thermal performance, and EMI compliance are critical constraints - especially infotainment, body electronics, and ADAS domains.

FAQ

What is the maximum allowable input voltage for MPQ4415AGQBE-AEC1-P?

The absolute maximum input voltage is 40V, but the recommended operating range is 4V to 36V. Operation above 36V violates the specified operating conditions and may trigger undervoltage lockout or cause premature device failure during load-dump transients unless externally clamped.

Does MPQ4415AGQBE-AEC1-P require an external bootstrap diode?

No external bootstrap diode is required for typical operation. The IC integrates a bootstrap regulator that charges the BST capacitor from the SW node. An external diode (e.g., IN4148) is optional and only recommended when duty cycle exceeds 65% to improve efficiency and reduce BST capacitor stress.

How is the output voltage set, and what is the reference voltage tolerance?

Output voltage is set using a resistor divider from VOUT to AGND connected to the FB pin. The internal reference is 0.807V with ±1.5% tolerance over –40°C to +125°C, enabling accurate regulation across automotive temperature extremes without trimming.

Can MPQ4415AGQBE-AEC1-P synchronize to an external clock, and what are the timing constraints?

Yes - the EN/SYNC pin accepts external clocks from 450kHz to 2.2MHz. The external clock pulse width must be below 350ns, and off-time must be below 1.9μs to ensure reliable synchronization without missed cycles or jitter accumulation.

What thermal derating applies above +85°C ambient?

At TA = +85°C, maximum continuous output current drops to ~1.2A due to thermal resistance (θJA = 60°C/W). Derating follows PD(MAX) = (150°C − TA)/60°C/W; at TA = +105°C, max power dissipation falls to 0.75W, limiting practical load current to ~0.9A with standard PCB layout.

Is the PG pin actively driven or open-drain, and what pull-up is required?

The PG pin is open-drain and requires an external pull-up resistor to VCC or another valid supply (≤6V). A 100kΩ resistor is typical; lower values improve rise time but increase quiescent current. PG sinks 4mA at 0.4V and asserts high when VFB reaches 88% of the reference voltage.

What is the purpose of the NC pin, and can it be grounded?

Pin 3 is a no-connect (NC) terminal with no internal connection. It must remain unconnected - grounding or routing to any net may compromise isolation between analog and power grounds, leading to erratic PG behavior or startup failure.