Monolithic Power Systems Inc. MP6604CGF-Z

Overview

MP6604CGF-Z from Monolithic Power Systems is a dual H-bridge motor driver IC designed for bipolar stepper and brushed DC motors, operating from 4.5V to 45V input voltage with 2.5A per-phase continuous current capability, 150mΩ typical R_DS(ON) per MOSFET, and integrated over-current, over-voltage, under-voltage, and thermal shutdown protections - deployed in stage lighting and 3D printer motion control systems.

For engineers reviewing the MP6604CGF-Z datasheet, MP6604CGF-Z pinout, MP6604CGF-Z application, or MP6604CGF-Z equivalent, key selection criteria include HS/LS independent control logic, QFN/TSSOP package thermal performance, fault reporting via open-drain nFAULT, and compatibility with 8Ω + 1.5mH inductive loads at 20kHz PWM.

Technical Context

The MP6604CGF-Z integrates eight N-channel power MOSFETs configured as four independently controllable half-H-bridges, supporting dual full-H-bridge (stepper) or quad half-H-bridge (solenoid/DC motor) topologies. Its gate drive architecture uses internal VCP charge-pump (VIN + 5V) for high-side FETs and regulated 5V VREG for low-side FETs.

Control logic implements automatic synchronous rectification during inductive recirculation, with dead time of 80ns and propagation delays under 360ns. Fault detection includes latched OCP (3–4.5A trip), OVP (45–48V), UVLO (4.5V rising), and thermal shutdown (165°C) with 15°C hysteresis.

Key Specifications

Pinout & Package

TSSOP-28EP (4.4mm × 9.7mm × 1.05mm height) with exposed thermal pad; RoHS-compliant, MSL Level 2a, rated for 3.9W continuous power dissipation at 25°C ambient.

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 DRV8825, the MP6604CGF-Z uniquely balances wide-input-voltage operation (4.5–45V), true dual-bridge independence, and integrated charge-pump-based HS drive - making it optimal for mixed-load industrial motion systems where voltage headroom and control granularity are critical.

Availability

MP6604CGF-Z is available at Aetrix Electronics and suitable for stage lighting, 3D printer motion control, and laser printer paper feed systems requiring stable component supply across extended production lifecycles.

Supply support for MP6604CGF-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The MP6604C product line delivers robust, integrated motor drivers for industrial automation and precision motion control, emphasizing wide-input-voltage resilience, comprehensive fault protection, and layout-efficient thermal design.

FAQ

What is the maximum continuous output current per channel for MP6604CGF-Z?

The MP6604CGF-Z supports 2.5A continuous current per phase under conditions of TA ≤ 85°C, adequate PCB copper area (≥2 oz), and thermal vias to inner layers. At 100°C ambient, derating reduces usable current to approximately 1.8A due to thermal shutdown thresholds and θJA = 32°C/W for TSSOP-28EP.

Does MP6604CGF-Z require external bootstrap capacitors?

No - MP6604CGF-Z integrates a charge pump (VCP) that generates VIN + 5V for high-side gate drive, eliminating external bootstrap diodes and capacitors. It requires only a 100nF flying capacitor between CPA and CPB, plus a 1µF ceramic capacitor from VCP to VIN.

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

During over-temperature events, the nFAULT pin pulls low and remains latched until nRESET is asserted or VIN is cycled. The device automatically resumes operation once die temperature falls below 150°C (165°C trip minus 15°C hysteresis), without requiring manual intervention beyond reset assertion.

Can MP6604CGF-Z drive unipolar stepper motors?

Yes - configured as four independent half-H-bridges, MP6604CGF-Z can energize individual windings of unipolar steppers. However, it does not provide center-tap switching logic; external wiring or MCU sequencing is required to manage common-tap current direction and phasing.

What is the recommended capacitor for the VREG pin?

A 1µF, 16V X7R ceramic capacitor is required between VREG and GND, placed within 2mm of the pin. This stabilizes the internal 5V regulator supplying low-side gate drivers and logic; tantalum or electrolytic capacitors are not recommended due to ESR and lifetime concerns.

Is MP6604CGF-Z pin-compatible with MP6604CGV?

No - MP6604CGF-Z (TSSOP-28EP) and MP6604CGV-Z (QFN-28) share identical functionality and signal mapping but differ in pin numbering and physical layout. PCB redesign is required for package substitution; refer to respective top-view diagrams in the datasheet for exact pin alignment.