Monolithic Power Systems Inc. MP6604AGF-P

Overview

MP6604AGF-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, and integrates OCP/OVP/UVLO/thermal shutdown with fault reporting via open-drain nFAULT. Used in 3D printers and stage lighting.

For engineers reviewing the MP6604AGF-P datasheet, MP6604AGF-P pinout, MP6604AGF-P application, or MP6604AGF-P equivalent, this page provides verified technical context, package-specific pin mapping (TSSOP-28EP), real-world timing behavior (e.g., 40–360ns logic-to-output delay), protection thresholds (4.5V UVLO rising, 48V OVP), and validated alternative part selection guidance.

Technical Context

The MP6604AGF-P integrates eight N-channel MOSFETs configured as two independent H-bridges, each with dedicated AINx/BINx control inputs and nAENx/nBENx enable pins-enabling precise half-bridge or full-bridge operation without shared logic constraints. It uses an internal charge pump (VCP = VIN + 5V) and 5V LDO (VREG) to drive high-side and low-side gates respectively.

Protection is implemented at silicon level: over-current detection triggers within 1µs deglitch window and latches until nRESET assertion or power cycle; thermal shutdown activates at 165°C with 15°C hysteresis; UVLO (4.5V rising) and OVP (45–48V) disable outputs independently. Fault status is reported on open-drain nFAULT requiring external pull-up.

Key Specifications

Pinout & Package

MP6604AGF-P is packaged in TSSOP-28EP (4.4mm × 9.7mm × 1.2mm), featuring an exposed thermal pad for enhanced heat dissipation in motor drive applications. The package includes 28 leads with gull-wing geometry and JEDEC MO-153 compliance.

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 DRV8876N, MP6604AGF-P offers optimal balance of wide 4.5–45V operation, 2.5A capability, minimal external components (no bootstrap diodes/caps), and comprehensive analog fault reporting - making it ideal for industrial-grade 24V motion control where reliability and layout simplicity are critical.

Availability

MP6604AGF-P is available at Aetrix Electronics and suitable for 3D printer motion control, stage lighting actuation, and laser printer paper feed systems requiring stable component supply across production lifecycles.

Supply support for MP6604AGF-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 two decades of expertise in DC-DC conversion, motor control, and battery management solutions.

The MP6604A product line targets industrial and commercial motion control applications, delivering robust dual H-bridge functionality with integrated protection and simplified layout requirements for stepper and brushed DC motor systems.

FAQ

What is the maximum continuous output current per channel for MP6604AGF-P?

The MP6604AGF-P delivers up to 2.5A continuous output current per phase under typical thermal conditions (TA = 25°C, 4-layer PCB, θJA = 32°C/W). This rating assumes proper PCB copper area, thermal vias under the exposed pad, and adequate input capacitance. Derating is required above 85°C ambient temperature per the thermal resistance curve.

Does MP6604AGF-P require external bootstrap components for high-side gate drive?

No. MP6604AGF-P integrates a charge pump (VCP = VIN + 5V) with dedicated CPA and CPB pins for a 100nF flying capacitor. Unlike bootstrap-based drivers, it eliminates the need for external diodes or timing-critical bootstrap capacitors, enabling reliable high-side drive across the full 4.5–45V input range without dead-time management.

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

During an over-current event exceeding the 3–4.5A threshold for longer than 1µs, the MP6604AGF-P disables all MOSFETs and pulls nFAULT low (≤0.5V @ 5mA). The fault remains latched until nRESET is asserted low or VIN is cycled. No automatic retry occurs - explicit reset is required before resuming operation.

Can MP6604AGF-P drive unipolar stepper motors?

No. MP6604AGF-P is designed exclusively for bipolar stepper motors (requiring 4-wire connection per phase) and brushed DC motors. Its dual H-bridge topology cannot replicate the center-tapped winding switching needed for unipolar steppers, which require separate half-bridge control per winding segment.

What is the recommended capacitor for the VREG pin?

A 1µF X7R ceramic capacitor rated for ≥16V must be placed between VREG and GND, located as close as possible to the pin. This capacitor stabilizes the internal 5V LDO supplying low-side gate drivers and logic circuits; using Y5V or insufficient voltage rating risks instability or premature failure under transient load.

Is sleep mode entry immediate upon pulling nSLEEP low?

No. Pulling nSLEEP low disables the charge pump and places outputs in high-impedance state, but there is a 600µs stabilization delay before the device fully enters low-power sleep mode. During this interval, internal regulators settle and gate drivers discharge - ensuring clean transition without output glitches.

How does automatic synchronous rectification reduce power loss?

When both high-side and low-side FETs are off during inductive flyback, the MP6604AGF-P monitors AOUTx/BOUTx voltage. If it drops below GND, the LS-FET turns on to conduct recirculation current through its channel instead of the lossy body diode - cutting conduction loss by ~50% compared to passive rectification.