Monolithic Power Systems Inc. MP6619GQ-P

Overview

MP6619GQ-P from Monolithic Power Systems is a fully integrated H-bridge motor driver IC designed for brushed DC motor control, operating from 5.4V to 28V input and delivering up to 5A peak output current with 65mΩ R_DS(ON) per half-bridge MOSFET, cycle-by-cycle current limiting, and integrated fault reporting via open-drain nFAULT pin - used in precision motion control subsystems of industrial actuators and robotic joints.

For engineers reviewing the MP6619GQ-P datasheet, MP6619GQ-P pinout, MP6619GQ-P application, or MP6619GQ-P equivalent, key selection criteria include its 100% duty-cycle capability enabled by dual bootstrap drivers (BST1/BST2), programmable current trip voltage (100–200mV) via ISET resistor, thermal shutdown at 150°C, and QFN-19 (3mm×3mm) package with exposed thermal pad for high-power-density PCB layouts.

Technical Context

The MP6619GQ-P implements a dual N-channel high-side / N-channel low-side H-bridge topology with internal charge-pump-assisted gate drivers enabling full 100% duty-cycle operation. Its current regulation uses external sense-resistor feedback routed through IFB and LSS pins, with programmable trip threshold (100–200mV) set by an ISET-to-GND resistor.

Fault management includes independent over-current protection (10A threshold, 1ms retry), input over-voltage lockout (32.2–35.5V), under-voltage lockout (5.1–5.35V turn-on), and junction over-temperature shutdown (150°C with 20°C hysteresis), all reported via active-low nFAULT with open-drain output requiring external pull-up.

Key Specifications

Pinout & Package

MP6619GQ-P is housed in a thermally enhanced QFN-19 (3mm × 3mm) package with exposed thermal pad (Pin 19 AGND), optimized for high-current motor drive applications requiring compact footprint and efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge motor driver applications.

Compared with TB6612FNG and DRV8876N, MP6619GQ-P uniquely balances 5A capability, 28V operation, analog-programmable current limit, and minimal external components - making it optimal for space-constrained, thermally demanding 12–24V industrial motion systems needing rapid deployment without firmware overhead.

Availability

MP6619GQ-P is available at Aetrix Electronics and suitable for industrial actuators, robotic joint modules, automated medical devices, and smart home lock mechanisms requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP6619GQ-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, including DC/DC converters, motor drivers, and LED controllers, with global manufacturing and quality certifications.

The MP6619 belongs to MPS's H-bridge motor driver product line, engineered specifically for compact, high-efficiency brushed DC motor control in industrial automation, robotics, and medical equipment where reliability, thermal performance, and analog configurability are prioritized.

FAQ

What is the recommended layout practice for the LSS and IFB pins?

Route LSS and IFB as a tightly coupled, short-length differential pair directly to the sense resistor's ground-side terminal, avoiding vias or nearby switching nodes. Place the sense resistor adjacent to the LSS pins and connect IFB to the same node - this minimizes noise coupling and ensures accurate current measurement within ±1% tolerance.

Can MP6619GQ-P drive a 24V, 4A DC motor continuously?

Yes - with proper PCB thermal design (≥4 cm² 2-oz copper pour connected to AGND pad and ≥6 thermal vias), MP6619GQ-P sustains 4A continuous current at 24V input. Power dissipation is ~1.04W (2 × 65mΩ × 4A²), well below its 2.5W QFN-19 limit at 25°C ambient, provided ambient temperature remains ≤85°C.

How does the ISET resistor affect motor startup behavior?

The ISET resistor sets V_ITRIP, which determines the current limit threshold at startup. With ISET floating (200mV default), startup surge current is limited to ~5A. If a resistor sets V_ITRIP = 100mV, startup current is capped at ~2.5A - reducing inrush stress on motor windings and supply but requiring longer acceleration time.

Is nFAULT asserted during normal current-limit cycling?

Yes - nFAULT is actively driven low during each current-limit event (i.e., when V_IFB ≥ V_ITRIP), not just for catastrophic faults. This allows MCU firmware to distinguish between temporary overload (e.g., motor stall) and persistent failures like short-circuit or thermal runaway based on nFAULT pulse duration and repetition rate.

What bootstrap capacitor value is required for BST1 and BST2?

A 0.1µF X7R ceramic capacitor rated ≥16V is recommended between each BSTx and corresponding OUTx pin. This value ensures sufficient charge storage for gate drive during 100% duty-cycle operation while minimizing ESR-induced voltage droop - verified in MPS application note AN-108.

Does MP6619GQ-P support PWM frequency above 20kHz?

Yes - the device supports PWM frequencies up to 100kHz, though efficiency and thermal performance peak near 20–50kHz. At higher frequencies, switching losses increase and minimum on-time (200ns) may constrain achievable duty resolution; layout parasitics also become more critical for clean gate drive.

How is the VCC LDO used internally, and can it power external circuitry?

VCC supplies internal logic, gate drivers, and protection circuits. While rated for 20mA, it is not intended to power external loads - doing so risks undervoltage reset (VVCC < 4.8V) during transient conditions. External 5V rails should power auxiliary circuitry; VCC must remain dedicated to the IC's internal functions.