Monolithic Power Systems Inc. MP6613GF-Z

Overview

MP6613GF-Z from Monolithic Power Systems is a 4.5V to 45V, 5A single H-bridge motor driver IC integrating four N-channel MOSFETs with 75mΩ typical R_DS(ON) per FET. It delivers bidirectional current control for brushed DC and bipolar stepper motors, features integrated OCP, OVP, UVP, and thermal shutdown, and supports three configurable input modes (PWM/PHASE, ENBL/BRK, HS/LS) via INM[1:0] pins. Used in laser printers and textile machines where compact, robust motor control is required.

For engineers reviewing the MP6613GF-Z datasheet, MP6613GF-Z pinout, MP6613GF-Z application, or MP6613GF-Z equivalent, key selection criteria include its 5A continuous output capability at 25°C ambient, TSSOP-28EP package thermal performance (θ_JA = 32°C/W), fault-indication via open-drain nFAULT, and support for automatic synchronous rectification to reduce body-diode conduction loss.

Technical Context

The MP6613GF-Z implements a full H-bridge topology using four N-channel power MOSFETs with gate drivers powered by an internal charge pump (VCP ≥ VIN + 5V) and 5V LDO (VREG). Its triple-mode logic interface-configured by INM0/INM1-enables PWM-driven half-bridge operation, phase/enable-controlled direction + enable, or discrete high-side/low-side control.

Protection architecture includes cycle-by-cycle over-current detection (6–9A trip threshold), input UVLO (4.5V rising, 300mV hysteresis), OVP (45–48V), and thermal shutdown at 165°C with 15°C hysteresis. Fault reporting is handled exclusively through the open-drain nFAULT pin, requiring external pull-up for system-level monitoring.

Key Specifications

Pinout & Package

TSSOP-28EP package (9.7mm × 4.4mm × 1.2mm max height) with exposed thermal pad; RoHS-compliant, MSL Level 2a, rated for 260°C reflow.

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, the MP6613GF-Z uniquely balances wide 4.5–45V operation, 5A capability, triple-input-mode configurability, and integrated protection-all in a thermally enhanced TSSOP-28EP package optimized for industrial motor control without external gate-drive complexity.

Availability

MP6613GF-Z is available at Aetrix Electronics and suitable for laser printers, textile machines, 3D printers, and stage lighting systems requiring stable component supply, long-term manufacturability, and automotive-grade reliability under industrial temperature conditions.

Supply support for MP6613GF-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 across Asia and North America and global distribution infrastructure.

The MP6613 product line targets cost-effective, robust motor control in industrial automation and precision motion systems-designed to replace discrete MOSFET bridges while delivering integrated protection, flexible interface options, and thermal resilience.

FAQ

What is the maximum continuous output current for MP6613GF-Z at 60°C ambient?

At T_A = 60°C, the MP6613GF-Z delivers up to 4.2A continuous output in a standard 4-layer PCB layout with 2oz copper, 6 thermal vias under the exposed pad, and 10cm² of 2oz copper pour. This is derived from its 3.9W power dissipation limit (θ_JA = 32°C/W) and R_DS(ON)-based loss calculation, confirmed in MPS Application Note AN-108.

How does the MP6613GF-Z implement automatic synchronous rectification?

When both HS and LS FETs are off and V_OUTx drops below GND, the LS-FET turns on to conduct recirculating current; if V_OUTx exceeds VIN, the HS-FET turns on. This is managed by internal comparators monitoring OUTx voltage relative to GND and VIN-reducing body-diode conduction loss and improving efficiency by up to 60% at 20kHz PWM.

Can MP6613GF-Z drive a unipolar stepper motor?

No-the MP6613GF-Z is designed exclusively for bipolar stepper motors and brushed DC loads. Its full H-bridge topology cannot replicate the center-tapped winding control required for unipolar steppers; using it with unipolar motors would result in incorrect phase energization and potential device damage due to improper current paths.

What external capacitors are mandatory for stable MP6613GF-Z operation?

Mandatory capacitors include: two 100nF X7R ceramics (one per VIN pin to PGND), one 100nF X7R flying capacitor between CPA and CPB, one 1µF X7R capacitor from VREG to GND, and one 1µF X7R capacitor from VCP to VIN. All must be rated ≥16V and placed within 2mm of respective pins per MPS layout guidelines.

Does MP6613GF-Z support 3.3V logic-level microcontrollers directly?

Yes-its logic inputs accept VIH ≥ 2.0V and VIL ≤ 0.8V, fully compatible with 3.3V CMOS outputs. Internal 100kΩ pull-down resistors eliminate external biasing needs, and all control pins (IN1, IN2, nEN1, etc.) tolerate 3.3V logic without level-shifting, verified across –40°C to +125°C junction temperature range.

How is thermal performance affected by omitting the exposed pad solder connection?

Omitting thermal pad soldering increases θ_JA from 32°C/W to >65°C/W, reducing maximum continuous current from 5A to ~2.8A at 25°C ambient. The exposed pad is electrically connected to PGND and must be soldered with ≥6 thermal vias (0.3mm diameter) to inner ground planes to maintain specified thermal limits and reliability.

What happens during simultaneous assertion of nSLEEP and nRESET?

When both nSLEEP and nRESET are pulled low, the device enters sleep mode first (disabling gate drive and regulators), then resets protection latches upon nRESET deassertion. Recovery requires nSLEEP to return high before normal operation resumes-no conflict or latch-up occurs, and timing aligns with the 600µs wake-up delay specified in the datasheet.