Monolithic Power Systems Inc. MPQ6519GR-AEC1-P

Overview

MPQ6519GR-AEC1-P 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. It enables bidirectional current control in automotive solenoids and DC motors via MODE pin polarity selection and supports PWM dimming (20–100kHz) for precise current regulation.

For engineers reviewing the MPQ6519GR-AEC1-P datasheet, MPQ6519GR-AEC1-P pinout, MPQ6519GR-AEC1-P application, or MPQ6519GR-AEC1-P equivalent, key selection criteria include its AEC-Q100 qualification, 30–300kHz programmable switching frequency, fault-indication output (FT), open-load/short-circuit protection, and QFN-19 (4mm×4mm) thermal performance (θ_JA = 44°C/W).

Technical Context

The MPQ6519GR-AEC1-P implements a four-MOSFET synchronous H-bridge with average-current-mode control using an internal error amplifier, sawtooth generator, and cycle-by-cycle over-current protection. Its dual bootstrap drivers (BSTP/BSTN) enable 100% duty-cycle operation for high-side N-channel MOSFETs while maintaining gate drive voltage above V_LP/V_LN + 6V limits.

Current regulation is achieved by comparing ISEN-sensed voltage against a programmable reference (set via ISET resistor), filtered through internal low-pass circuitry for PWM input (20–100kHz). Fault detection includes latch-off OCP at 13A, hiccup-mode recovery at 300mV sense threshold, and thermal shutdown at 150°C with 20°C hysteresis.

Key Specifications

Pinout & Package

MPQ6519GR-AEC1-P uses a thermally enhanced QFN-19 (4mm × 4mm) package with exposed thermal pad, optimized for automotive PCB layouts requiring high power density and low thermal impedance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ6519GR-AEC1-P, MPQ6520GR-AEC1-P offers higher current headroom and lower R_DS(ON), while TLE8209-2SA trades monolithic integration for richer diagnostic capabilities and dual-channel flexibility-making each suitable for distinct automotive subsystem priorities.

Availability

MPQ6519GR-AEC1-P is available at Aetrix Electronics and suitable for automotive solenoid control, electric power steering assist, and HVAC blower motor applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MPQ6519GR-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 core expertise in DC-DC conversion, motor drivers, and automotive-grade analog solutions.

The MPQ6519 belongs to MPS's AEC-Q100-qualified H-bridge current regulator product line, designed specifically for automotive electromechanical actuators requiring precise, bidirectional, and fault-resilient current control.

FAQ

What is the minimum PWM frequency supported for current dimming?

The MPQ6519GR-AEC1-P requires a minimum PWM input frequency of 20kHz to ensure stable current regulation and avoid audible noise. Frequencies below this threshold cause increased output current ripple and potential instability in the internal low-pass filter response, degrading dimming linearity and accuracy.

How does the MODE pin affect H-bridge operation?

When MODE is pulled high, current flows from LP to LN (positive polarity); when pulled low, current reverses from LN to LP (negative polarity). The pin includes 150ns deglitching to prevent spurious polarity changes during transients, and polarity switching occurs only after the next switching cycle to avoid shoot-through.

Can the MPQ6519GR-AEC1-P operate with input voltage below 5V?

Yes-the internal VCC LDO regulates to 4.5–5.5V when VIN > 5.2V, but drops linearly with VIN below 5V (100mV dropout). Operation is guaranteed down to 3V input; however, VCC falls below 2.15V at VIN < 2.25V, triggering power reset and shutdown until VIN rises above 2.3V.

What is the purpose of the three parallel ISEN pins?

The three ISEN pins (pins 6–8) are internally bonded together to reduce effective resistance and thermal coefficient mismatch in the current-sense path. This configuration improves measurement accuracy and stability at high currents (up to 5A), minimizing gain error caused by PCB trace heating or solder joint resistance.

How does the fault indication (FT) pin behave during over-temperature events?

During over-temperature shutdown (T_J > 150°C), the FT pin pulls low and remains latched until either input power is cycled or the EN pin is toggled. This behavior provides unambiguous fault signaling to the host microcontroller, enabling diagnostic logging and safe system response before thermal recovery to 130°C allows automatic restart.

Is external compensation required for stable current loop operation?

Yes-COMP pin requires an external RC network (R, C_Z, C_P) to stabilize the current control loop. The zero should align with the load's L/R pole, and the pole placed near switching frequency to suppress high-frequency noise. Without proper compensation, the system exhibits overshoot, ringing, or instability during step-load transients.

What is the maximum allowable R_ISET value for full-scale current programming?

The maximum recommended R_ISET is 80kΩ, which sets the full-scale reference voltage to 100mV (per V_REF = 200mV × 40kΩ/R_ISET). Values above 80kΩ reduce reference accuracy due to leakage current effects and are not characterized; 40kΩ–80kΩ is specified for optimal 100–200mV range and ±2% accuracy.