Monolithic Power Systems Inc. MP6614GN-Z

Overview

MP6614GN-Z from Monolithic Power Systems is a 35V H-bridge DC motor driver IC integrating four N-channel MOSFETs, internal charge pump, and cycle-by-cycle current regulation. It delivers up to 2A continuous output current (I_OUT) across 5V–35V input range (V_IN), supports 100% duty-cycle PWM control, and provides proportional current-sense output (V_ISEN) without external shunt resistors - used in brushed DC motor control for industrial actuators and automated valves.

For engineers reviewing the MP6614GN-Z datasheet, MP6614GN-Z pinout, MP6614GN-Z application, or MP6614GN-Z equivalent, key selection criteria include its SOIC-8EP thermal performance (θ_JA = 48°C/W), integrated OCP/OTP/UVLO protection, ISET-based current limit programming, and compatibility with 3.3V/5V logic interfaces in space-constrained motor control designs.

Technical Context

The MP6614GN-Z implements a constant-off-time PWM current regulator using internal sensing of low-side MOSFET conduction, with blanking time (800 ns) to suppress reverse-recovery spikes. Its dual-input logic interface directly controls forward/reverse/brake/coast states without external gate drivers.

It uses an internal charge pump to generate high-side gate drive voltage, enabling full N-channel H-bridge operation with R_DS(ON) of 280 mΩ (HS-FET) and 220 mΩ (LS-FET) at 25°C, supporting bidirectional 2A loads while maintaining <1 μA shutdown current and 250–500 µs sleep recovery.

Key Specifications

Pinout & Package

MP6614GN-Z is housed in a thermally enhanced SOIC-8EP (exposed pad) package, with the EP soldered to GND for optimal heat dissipation (θ_JC = 10°C/W). The 8-pin layout supports compact motor driver placement adjacent to motor terminals and microcontroller GPIOs.

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, MP6614GN-Z uniquely balances 35V operation, 2A capability, and analog VISEN scalability in SOIC-8EP - making it optimal for mid-power industrial actuators where board space, thermal management, and analog feedback simplicity are prioritized.

Availability

MP6614GN-Z is available at Aetrix Electronics and suitable for industrial valve actuators, automated door locks, robotic joint controllers, and medical infusion pumps requiring stable component supply and long-term manufacturability.

Supply support for MP6614GN-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 MP6614 belongs to MPS's motor driver product line, engineered for compact, thermally efficient bidirectional control of brushed DC and stepper motors in industrial automation and precision motion systems.

FAQ

What is the maximum allowable continuous output current for MP6614GN-Z?

The MP6614GN-Z supports up to 2A continuous output current (I_OUT) under typical thermal conditions - verified at T_A = 25°C with recommended PCB layout including thermal vias under the exposed pad. Actual current capability scales inversely with ambient temperature and copper area; derating is required above 70°C ambient.

How does the ISET pin set current limit and relate to VISEN?

The ISET pin sources a current of 100 µA per ampere of desired I_OUT limit. A resistor R_ISET from ISET to GND sets V_ISET = I_OUT(LIMIT) × R_ISET × 100 µA. VISEN then outputs 2 × V_ISET, providing a scalable analog current monitor without external gain stages or shunts.

Does MP6614GN-Z require external bootstrap capacitors?

No - the MP6614GN-Z integrates an internal charge pump that generates the gate drive voltage for the high-side N-channel MOSFETs. This eliminates the need for external bootstrap diodes or capacitors, simplifying layout and improving reliability in high-duty-cycle applications.

What happens when both IN1 and IN2 are held low for more than 2 ms?

After 2 ms of IN1 = IN2 = 0, the MP6614GN-Z enters low-power sleep mode: all gate drivers disable, charge pump stops, and quiescent current drops to ≤1 µA. Normal operation resumes within 500 µs after either input rises above 1.5V, enabling rapid wake-up for intermittent actuation.

Can MP6614GN-Z drive a stepper motor winding?

Yes - the MP6614GN-Z can drive one bipolar stepper motor winding (phase) as a half-H-bridge, delivering up to 2A with current regulation. For full bipolar stepper control, two MP6614GN-Z units are required - one per phase - enabling independent current limiting and microstepping-compatible PWM timing.

What thermal considerations apply to the SOIC-8EP package?

The SOIC-8EP package relies on the exposed pad (EP) soldered to a GND plane with ≥6 thermal vias (0.3 mm diameter) for effective heat transfer. With θ_JA = 48°C/W on a 4-layer board, 2A operation at 12V requires ≤1.5W total dissipation - achievable only with adequate copper area and airflow; junction temperature must stay below 125°C for continuous use.