Monolithic Power Systems Inc. MPQ6531GVE-AEC1-Z

Overview

MPQ6531GVE-AEC1-Z from Monolithic Power Systems is a three-phase BLDC motor pre-driver IC designed to drive six external N-channel MOSFETs in half-bridge configurations across 5V–60V input rails. It integrates a regulated charge pump (VREG ≈ 11.5V), bootstrap high-side drivers with trickle-charge for 100% duty cycle, adjustable dead-time control (90ns–5.7µs), and AEC-Q100 Grade 1 qualification for automotive actuator applications.

For engineers reviewing the MPQ6531GVE-AEC1-Z datasheet, MPQ6531GVE-AEC1-Z pinout, MPQ6531GVE-AEC1-Z application, or MPQ6531GVE-AEC1-Z equivalent, key selection criteria include its 0.8A HS source / 1A LS sink gate drive capability, LSS-based over-current protection threshold (0.4–0.6V), thermal shutdown at 190°C, and QFN-28 (4mm×5mm) wettable flank package for automated optical inspection.

Technical Context

The MPQ6531GVE-AEC1-Z implements a dual-path gate drive architecture: a regulated charge pump powers low-side drivers and VREG output (9.5–14V), while high-side drivers rely on bootstrap capacitors augmented by an internal 5µA trickle-charge circuit to sustain operation at 100% duty cycle. Its fault handling includes independent VDS-sensing short-circuit detection and LSS shunt-based over-current protection, both with 3µs deglitch timing.

Control logic accepts standard TTL/CMOS inputs (VIH = 2V, VIL = 0.8V) with internal pull-downs on all logic pins except nSLEEP; dead time is set via a single external resistor (RDT) tied to DT pin, enabling precise shoot-through prevention across all three phases using Equation tDEAD(ns) = 60 × R(kΩ).

Key Specifications

Pinout & Package

The MPQ6531GVE-AEC1-Z is housed in a thermally enhanced QFN-28 package (4mm × 5mm) with exposed thermal pad and wettable flanks for solder joint inspection. The package supports ≤3.1W continuous power dissipation at +25°C ambient (θJA = 40°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-phase BLDC pre-driver applications.

Compared with MPQ6531GVE-AEC1-Z, MPQ6521GVE-AEC1-Z trades 100% duty-cycle capability and extended 60V rating for cost reduction, while TLE9201SG adds analog sensing at the expense of qualification rigor and integrated gate supply - making MPQ6531 the optimal choice for AEC-Q100-compliant, high-voltage, continuous-duty automotive pre-driving.

Availability

MPQ6531GVE-AEC1-Z is available at Aetrix Electronics and suitable for electric power steering (EPS), brake-by-wire actuators, and engine cooling fan control requiring stable component supply, AEC-Q100 compliance, and production-ready wettable flank packaging.

Supply support for MPQ6531GVE-AEC1-Z 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 distribution through authorized partners.

The MPQ6531 product line delivers AEC-Q100-qualified three-phase BLDC pre-drivers targeting automotive electrification subsystems where functional safety, thermal resilience, and gate drive precision are essential.

FAQ

What is the purpose of the trickle-charge circuit in MPQ6531GVE-AEC1-Z?

The trickle-charge circuit supplies ~5µA to bootstrap capacitors during high-side MOSFET conduction, compensating for leakage and enabling reliable 100% duty cycle operation - critical for applications like electric power steering where continuous high-side drive is required without gate voltage collapse.

How does the MPQ6531GVE-AEC1-Z implement over-current protection?

It uses two independent methods: VDS sensing (comparing MOSFET drain-source voltage against OC_REF) for short-circuit detection, and LSS pin monitoring (measuring voltage across external shunt resistor) for over-current protection. Both trigger a latched fault state with nFAULT assertion and require nSLEEP or VIN UVLO reset.

Can MPQ6531GVE-AEC1-Z drive SiC or GaN MOSFETs?

Yes - its 0.8A source / 1A sink gate drive strength, <10ns propagation delay (implied by 20kHz PWM performance), and programmable dead time support fast-switching wide-bandgap devices; however, external gate resistors and optimized PCB layout are required to manage dV/dt and EMI in high-frequency operation.

What is the function of the DT pin and how is dead time calculated?

The DT pin accepts an external resistor to ground that sets dead time across all three phases using tDEAD(ns) = 60 × R(kΩ). For example, a 20kΩ resistor yields ~1.2µs dead time. Connecting DT directly to GND applies the minimum 90ns dead time, while open-circuit defaults to that same minimum value.

Is the VREG output internally regulated, and what load can it drive?

Yes - VREG is a regulated output (9.5–14V) generated by an internal charge pump. At VIN = 5V, it can deliver ~10mA; at higher VIN, output current capability increases. It powers low-side gate drivers and must be bypassed with ≥10µF X7R ceramic capacitor placed adjacent to the IC.

Does MPQ6531GVE-AEC1-Z support 3.3V logic inputs?

Yes - its VIH threshold is 2.0V minimum and VIL is 0.8V maximum, fully compatible with 3.3V CMOS/TTL logic levels. All logic inputs (HA–LC, nSLEEP, nFAULT) have internal pull-downs except nSLEEP, which has an internal pull-down ensuring safe default disable state.

What distinguishes the 'E' suffix in MPQ6531GVE-AEC1-Z?

The 'E' denotes wettable flank construction - the QFN package features solderable sidewalls enabling automated optical inspection (AOI) of solder joints. This enhances process yield and reliability verification in automotive SMT lines, distinguishing it from standard MPQ6531GV-AEC1-Z variants.