Monolithic Power Systems Inc. MP6514GGU-Z

Overview

MP6514GGU-Z from Monolithic Power Systems is a 2.5V–14V H-bridge motor driver IC with four N-channel MOSFETs, internal charge pump, and independent high-side/low-side control logic. It delivers up to 0.6A continuous output current, features 500mΩ HS/LS R_DS(ON), and integrates OCP, SCP, UVLO, and OTP protection. It drives small DC motors in toys and portable medical devices.

For engineers reviewing the MP6514GGU-Z datasheet, MP6514GGU-Z pinout, MP6514GGU-Z application, or MP6514GGU-Z equivalent, key selection considerations include its UTQFN-8 (2mm×2mm) footprint, separate HIN/LIN control architecture, 100ns dead time, 20μA sleep current, and compatibility with 2.5V logic-level inputs.

Technical Context

The MP6514GGU-Z implements a fully integrated H-bridge using four N-channel power MOSFETs with gate drive powered by an internal charge pump-eliminating need for external high-side drivers. Its logic interface accepts standard 2.5V–5V CMOS inputs with internal 100kΩ pull-down resistors on all four control pins (HIN1, LIN1, HIN2, LIN2).

Protection is implemented at silicon level: cycle-by-cycle over-current detection triggers automatic 0.85ms retry, thermal shutdown activates at 160°C with 25°C hysteresis, and UVLO engages below 2.2V (rising threshold). Sleep mode enters after 2ms of all-low inputs, reducing supply current to 20μA.

Key Specifications

Pinout & Package

MP6514GGU-Z is housed in a thermally enhanced UTQFN-8 package (2mm × 2mm, 0.4mm height) with exposed thermal pad. The package supports high-density PCB layouts and provides θ_JA = 90°C/W on standard 4-layer boards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG and DRV8833, MP6514GGU-Z offers superior integration (charge pump, sleep mode, OCP retry) in minimal area, making it optimal for ultra-compact, battery-sensitive single-motor applications where autonomous fault handling is critical.

Availability

MP6514GGU-Z is available at Aetrix Electronics and suitable for robotic toy actuation, portable medical pump control, and consumer appliance fan driver applications requiring stable component supply and long-term lifecycle support.

Supply support for MP6514GGU-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 analog and power ICs, with design centers in the US, China, and Taiwan.

The MP6514 belongs to MPS's motor driver product line, engineered specifically for compact, low-voltage, battery-powered motion control where integration, efficiency, and fault resilience are prioritized over raw current capacity.

FAQ

What is the minimum VCC voltage required for reliable operation?

The MP6514GGU-Z has a guaranteed operating range starting at 2.5V, with under-voltage lockout releasing at 2.2V (rising threshold). Below 2.5V, output current capability degrades linearly; operation below 2.2V disables all outputs and resets internal logic. For Li-ion applications, this ensures safe cutoff before cell damage occurs.

Can MP6514GGU-Z drive a stepper motor?

No-it is designed exclusively for brushed DC motor control. Its four independent gate controls (HIN1/LIN1/HIN2/LIN2) support only unidirectional or bidirectional drive of a single motor or two separate DC motors. Stepper motor commutation requires phase sequencing not supported by its truth table or internal logic.

How does the internal charge pump function without external components?

The charge pump uses an internal oscillator and flying capacitor to generate ~10.5V gate drive from VCC ≥2.5V. No external capacitors are needed because the pump circuit and storage capacitance are fully integrated into the die. This enables full N-MOSFET enhancement even at 2.5V input, eliminating external boost circuitry.

What happens during an over-current event?

When current exceeds the OCP threshold (1A–2A), both high-side and low-side FETs in the affected channel turn off within 1μs. After a fixed 0.85ms delay, the bridge automatically re-enables. If the fault persists, the cycle repeats-providing self-recovering protection without latching or requiring MCU intervention.

Is MP6514GGU-Z pin-compatible with MP6513?

No-MP6513 uses a different pinout and logic architecture. MP6514GGU-Z has four independent control inputs (HIN1/LIN1/HIN2/LIN2), while MP6513 uses IN1/IN2 with built-in direction logic. They share the same UTQFN-8 package outline but are not electrically or mechanically interchangeable.

Does the device require external current-sense resistors?

No-over-current protection is implemented using internal MOSFET R_DS(ON) sensing. The OCP threshold is fixed at 1A–2A and cannot be adjusted externally. For applications requiring programmable current limiting, an external sense resistor and comparator would be needed upstream.

What PCB layout guidance applies to the thermal pad?

The exposed thermal pad (Pin 6 GND) must be soldered to a minimum 25mm² copper pour connected to the main GND plane via ≥4 thermal vias (0.3mm diameter). Inadequate thermal connection raises junction temperature by >30°C at 0.6A, risking premature thermal shutdown.