Monolithic Power Systems Inc. MP6604AGV-P

Overview

MP6604AGV-P from Monolithic Power Systems is a dual H-bridge motor driver IC designed for bipolar stepper and brushed DC motor control in industrial motion systems. It operates from 4.5V to 45V input voltage, delivers up to 2.5A per phase, features separate IN/EN pins per output, integrated charge pump, and real-time fault reporting via open-drain nFAULT. Used in precision stage lighting and 3D printer axis drivers.

For engineers reviewing the MP6604AGV-P datasheet, MP6604AGV-P pinout, MP6604AGV-P application, or MP6604AGV-P equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection thresholds, and real-world implementation guidance for stepper and DC motor drive circuits requiring independent half-bridge control and robust fault handling.

Technical Context

The MP6604AGV-P integrates eight N-channel MOSFETs configured as four independently controllable half-bridges, enabling dual H-bridge (bipolar stepper) or quad half-bridge (solenoid/DC motor) operation. Its gate drivers use internal VREG (5V) and VCP (VIN + 5V) supplies with external 1µF decoupling capacitors on both rails.

Protection logic includes latchable over-current detection (3–4.5A threshold), UVLO (4.5V rising, 300mV hysteresis), OVP (45–48V), and thermal shutdown (165°C trip, 15°C hysteresis). Fault status is reported asynchronously via open-drain nFAULT, requiring external pull-up for system-level monitoring.

Key Specifications

Pinout & Package

MP6604AGV-P uses QFN-28 (4mm × 5mm) package with exposed thermal pad. Pin numbering follows standard top-view layout; all power grounds (PGNDA, PGNDB, GND) must be connected to low-impedance ground plane with multiple vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG and DRV8876PWPR, MP6604AGV-P uniquely balances wide input voltage (4.5–45V), per-output enable independence, integrated fault reporting, and QFN thermal performance-making it optimal for industrial stepper and multi-motor DC systems where reliability and layout simplicity are critical.

Availability

MP6604AGV-P is available at Aetrix Electronics and suitable for bipolar stepper motor control, stage lighting positioning, and 3D printer axis drive applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6604AGV-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 over 20 years of expertise in DC-DC conversion, motor control, and battery management solutions.

The MP6604A product line delivers integrated dual H-bridge drivers for industrial motion control, emphasizing independent half-bridge configurability, robust protection, and simplified PCB layout-targeting applications where reliability, thermal efficiency, and fault visibility are essential.

FAQ

What is the maximum continuous output current per channel for MP6604AGV-P?

The MP6604AGV-P supports up to 2.5A continuous output current per phase under typical thermal conditions (TA = 25°C, 4-layer PCB, θJA = 40°C/W). Derating is required above 85°C ambient; at 100°C, max continuous current drops to ~1.8A based on thermal shutdown margin and junction temperature limits.

Does MP6604AGV-P require external bootstrap capacitors?

No. MP6604AGV-P integrates a charge pump (VCP) that generates VIN + 5V for high-side gate drive, eliminating the need for external bootstrap diodes or capacitors. Instead, it requires a 100nF flying capacitor between CPA and CPB, plus a 1µF ceramic capacitor between VCP and VIN.

How does the nFAULT pin behave during over-current events?

When over-current, over-voltage, or thermal shutdown occurs, nFAULT is actively pulled low (open-drain). It remains latched low until nRESET is asserted or VIN is cycled. The pin requires an external pull-up resistor (typically 4.7–10kΩ to 3.3V or 5V) to generate a valid logic-high signal during normal operation.

Can MP6604AGV-P drive unipolar stepper motors?

No. MP6604AGV-P is designed exclusively for bipolar stepper motors (requiring full H-bridge winding control) and brushed DC motors. Unipolar steppers require center-tapped windings and single-ended drive, which this IC does not support due to its dual-H-bridge architecture and lack of common-anode/cathode switching.

What is the purpose of separate PGNDA and PGNDB pins?

PGNDA and PGNDB provide isolated power ground return paths for Bridge A and Bridge B, respectively. This separation minimizes crosstalk between motor phases, improves current sensing accuracy, and enhances thermal distribution across the QFN thermal pad-critical for maintaining stability in dual-motor or high-dynamic-load applications.

Is sleep mode entry immediate upon pulling nSLEEP low?

No. Pulling nSLEEP low disables the charge pump and places all outputs in Hi-Z, but there is a 600µs internal stabilization delay before the device fully enters low-power sleep mode. During this interval, outputs remain disabled, and no switching activity occurs-ensuring clean transition without voltage transients.

What external capacitors are mandatory for stable operation?

Mandatory capacitors include: (1) ≥100nF ceramic per VIN pin (placed adjacent to IC), (2) 100nF X7R between CPA and CPB, (3) 1µF X7R between VCP and VIN, and (4) 1µF X7R between VREG and GND. All must be rated ≥16V; bulk capacitance (e.g., 10–100µF) is recommended near VIN for high-current transients.