Monolithic Power Systems Inc. MPQ6519GR-AEC1-Z

Overview

MPQ6519GR-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified monolithic H-bridge current regulator delivering up to 5A output with ±2% full-scale accuracy, 3V–28V input range, and integrated 65mΩ R_DS(ON) MOSFETs-designed for bidirectional DC motor control in automotive body electronics and solenoid actuation systems.

For engineers reviewing the MPQ6519GR-AEC1-Z datasheet, MPQ6519GR-AEC1-Z pinout, MPQ6519GR-AEC1-Z application, or MPQ6519GR-AEC1-Z equivalent, key selection criteria include programmable 30–300kHz switching frequency, 20–100kHz PWM dimming input, selectable current polarity via MODE pin, cycle-by-cycle OCP, and fault-indicating open-drain FT output.

Technical Context

The MPQ6519GR-AEC1-Z implements a four-MOSFET synchronous H-bridge with average-current-mode control using an internal error amplifier (270µA/V transconductance), sawtooth PWM comparator, and programmable frequency oscillator. It supports 100% duty-cycle operation via dual bootstrap drivers (BSTP/BSTN) enabling continuous conduction mode for inductive loads.

Current regulation is achieved by comparing sensed ISEN voltage against a precision 200mV (±2%) reference set at ISET, then filtering PWM-modulated reference through internal low-pass circuitry. Fault management includes latch-off OCP at 13A, hiccup-mode recovery at 300mV sense threshold, 28.2–32V input OVP, and thermal shutdown at 150°C with 20°C hysteresis.

Key Specifications

Pinout & Package

MPQ6519GR-AEC1-Z uses a QFN-19 (4mm × 4mm) package with exposed thermal pad. Pin numbering follows top-view layout with Pin 1 marked by index area; recommended land pattern includes thermal vias under exposed pad for optimal heat transfer.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge current regulator applications.

Compared with TB9051FTG and DRV8876N, MPQ6519GR-AEC1-Z delivers the highest combination of automotive qualification, current accuracy (±2%), and integration density-making it optimal for space-constrained, safety-relevant body electronics where BOM simplification and thermal performance are critical.

Availability

MPQ6519GR-AEC1-Z is available at Aetrix Electronics and suitable for automotive HVAC systems, electronic power steering modules, and door lock actuator assemblies requiring stable component supply with AEC-Q100 compliance and long-term production continuity.

Supply support for MPQ6519GR-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 over 20 years of expertise in DC-DC conversion, motor control, and automotive-grade analog solutions.

The MPQ6519 belongs to MPS's AEC-Q100-qualified H-bridge current regulator product line, engineered specifically for automotive body electronics requiring precise, bidirectional current control with integrated protection and minimal external components.

FAQ

What is the maximum allowable input voltage for MPQ6519GR-AEC1-Z?

The absolute maximum input voltage is 35V, but the recommended operating range is 3V to 28V. Exceeding 28V triggers input over-voltage protection (OVP) at 28.2–32V, causing immediate latch-off. This threshold accommodates automotive load-dump transients while protecting internal circuitry.

How does the MODE pin affect current direction in the H-bridge?

When MODE is pulled high, current flows from LP to LN (positive polarity); when MODE is pulled low, current flows from LN to LP (negative polarity). The IC includes 150ns deglitching to prevent spurious transitions during noisy automotive environments, ensuring deterministic motor/solenoid direction control.

Can MPQ6519GR-AEC1-Z operate with 100% duty cycle?

Yes-dual bootstrap drivers (BSTP and BSTN) enable true 100% duty cycle operation for both high-side MOSFETs. This allows continuous conduction mode essential for maintaining torque in DC motors during low-speed or stall conditions without current decay.

What is the purpose of the three parallel ISEN pins?

Pins 6, 7, and 8 are bonded together internally as a single current-sense node. Using all three reduces effective bond wire resistance and thermal coefficient drift, improving measurement stability across temperature and enabling lower-value, higher-precision sense resistors (e.g., 1mΩ) without compromising accuracy.

Does MPQ6519GR-AEC1-Z require external compensation components?

Yes-COMP pin requires an external RC network (R_C, C_Z, C_P) to stabilize the current control loop. Compensation zero should align with the load's L/R pole; pole placement near switching frequency suppresses high-frequency noise. MPS Application Note AN-107 provides design equations and layout guidance.

How is fault condition cleared after FT pin asserts low?

A fault-latched condition (e.g., OCP latch-off or OVP) is cleared only by cycling the input supply voltage or toggling the EN pin low for >100ns. Simply removing the fault cause (e.g., short removal) does not auto-reset; this ensures system-level fault acknowledgment before resuming operation.

What thermal performance can be expected in a standard 4-layer PCB layout?

With recommended layout (thermal vias under exposed pad, 2oz copper, 4cm² copper pour), θ_JA is 44°C/W. At 5A output and 12V input, power dissipation is ~1.2W, resulting in ~53°C junction rise above ambient-well within the 125°C max operating junction temperature limit.