Monolithic Power Systems Inc. MP6507GQ-P

Overview

MP6507GQ-P from Monolithic Power Systems is a bipolar stepper-motor driver IC with dual integrated N-channel full-bridge MOSFETs, operating from 2.7V to 15V and delivering up to 700mA per channel. It features internal charge pump, 1.1mA quiescent current, thermal shutdown with fault flag output, and supports both external PWM and internal constant-off-time current control for precise winding current regulation in POS printers and security cameras.

For engineers reviewing the MP6507GQ-P datasheet, MP6507GQ-P pinout, MP6507GQ-P application, or MP6507GQ-P equivalent, key selection criteria include its 3×3mm QFN package with exposed thermal pad, dual full-bridge topology, 185mV current-sense threshold, 27µs constant off-time, and sleep-mode leakage of 1µA - all critical for battery-powered motion control designs requiring low power and thermal robustness.

Technical Context

The MP6507GQ-P implements two independent full-bridge drivers using eight N-channel MOSFETs with matched on-resistance (HS/LS ≈ 460mΩ/395mΩ at 5V, 25°C). Its internal charge pump enables high-side gate drive without external components, while the constant-off-time PWM current controller uses an external sense resistor and 185mV trip threshold to regulate motor current with 2.7µs blanking time to suppress switching noise.

Control logic accepts standard TTL/CMOS inputs (AIN1/AIN2/BIN1/BIN2) to configure full-step, half-step, or microstepping via external sequencing; nSLEEP enables 1µA standby mode with ~1.5ms wake-up delay. Fault reporting is provided via open-drain FAULT pin asserting low during over-temperature (165°C trigger, 15°C hysteresis) or UVLO conditions.

Key Specifications

Pinout & Package

MP6507GQ-P is housed in a thermally enhanced 3mm × 3mm QFN-16 package with exposed thermal pad (connected to GND), optimized for compact motor-control PCBs requiring efficient heat dissipation without heatsinks.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar stepper-motor driver applications.

Compared with TB6600HG and DRV8834, MP6507GQ-P uniquely balances 15V operation, 700mA capability, and 3×3mm footprint with direct gate control - making it optimal for compact, battery-aware stepper systems where thermal efficiency and layout simplicity are prioritized over integrated indexing or ultra-high current.

Availability

MP6507GQ-P is available at Aetrix Electronics and suitable for POS printers, video security cameras, digital still cameras, and battery-powered toys requiring stable component supply, thermal resilience, and compact motor-drive integration.

Supply support for MP6507GQ-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 analog and power ICs, with design centers across Asia and North America and global manufacturing partnerships.

The MP6507 product line targets cost-sensitive, space-constrained motion-control applications in consumer electronics and industrial peripherals, emphasizing integrated power stages, low quiescent power, and robust thermal protection without external support components.

FAQ

What is the recommended PCB layout practice for thermal management of MP6507GQ-P?

The exposed thermal pad on the MP6507GQ-P's QFN package must be soldered directly to a large copper pour tied to GND, with ≥6 thermal vias (0.3mm diameter, spaced ≤1mm apart) connecting to inner or bottom-layer ground planes. Keep sense resistors within 2mm of SENA/SENB pins and route high-current motor traces wide (≥0.5mm) and short to minimize IR drop and EMI.

Can MP6507GQ-P drive two independent DC motors instead of a stepper motor?

Yes - the dual full-bridge architecture allows independent control of two brushed DC motors. Apply complementary PWM signals to AIN1/AIN2 for motor A and BIN1/BIN2 for motor B. Each bridge supports bidirectional rotation and braking; current limiting remains active per channel via separate SENA/SENB sense paths.

How does the internal blanking time affect current regulation accuracy?

The 2.7µs blanking time prevents false current-limit triggering during MOSFET switching transitions by disabling the sense comparator output. This ensures accurate current measurement only during stable conduction, but requires careful selection of R_SENSE to maintain sufficient voltage margin above 185mV after blanking ends - especially at low currents or high PWM frequencies.

What external components are mandatory for basic MP6507GQ-P operation?

Mandatory components include: (1) 10µF input capacitor (VIN to GND), (2) 2.2µF VDD bypass capacitor (VDD to GND), (3) 10nF–100nF BST-to-VIN capacitor, (4) two current-sense resistors (R_SENA/R_SENB) sized per desired I_LIMIT, and (5) pull-up on FAULT if monitoring is required. No bootstrap diodes or external regulators are needed.

Does MP6507GQ-P support microstepping, and if so, how is it implemented?

MP6507GQ-P does not include native microstepping logic but supports waveform-based microstepping via external MCU control of AIN1/AIN2/BIN1/BIN2. By applying precise PWM duty cycles and phase offsets to the four gate inputs, fractional step positions (e.g., 1/4, 1/8, 1/16) can be achieved - though current regulation remains at full/half-step granularity unless combined with external DAC-based current profiling.

What is the maximum allowable motor supply voltage when using MP6507GQ-P?

The absolute maximum VIN rating is 18V, but the recommended operating range is 2.7V to 15V per datasheet specifications. Exceeding 15V risks violating safe operating area limits under load, particularly at elevated temperatures; sustained operation above 15V voids guaranteed performance and may trigger UVLO or thermal shutdown unpredictably.

How does the FAULT pin behave during UVLO versus thermal shutdown?

The FAULT pin asserts low for both conditions - UVLO (VIN < 2.5V rising threshold) and thermal shutdown (T_J > 165°C). It remains low until the fault condition clears: UVLO recovers when VIN exceeds 2.57V (2.5V + 70mV hysteresis); thermal recovery occurs at ~150°C. No distinction between fault types is provided on this pin; external monitoring requires correlating with VIN and temperature sensors.