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Monolithic Power Systems Inc. MP6500GU-Z
- Part No.:
- MP6500GU-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MP6500GU-Z.pdf
- Description:
- IC MTR DRVR BIPOLR 4.5-35V 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,477
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Product details
Overview
MP6500GU-Z from Monolithic Power Systems is a bipolar stepper motor driver IC with integrated translator, internal current sensing, and dual full-bridge output stages. It operates from 4.5V to 35V input, delivers up to 2.5A per phase (PCB/thermal dependent), supports full/half/quarter/eighth-step microstepping, and includes OCP, OVP, UVLO, and thermal shutdown. It is used in precision motion control for printers, CNC stages, and automated lab equipment.
For engineers reviewing the MP6500GU-Z datasheet, MP6500GU-Z pinout, MP6500GU-Z application, or MP6500GU-Z equivalent, key selection considerations include its QFN-24 (5mm×5mm) package, internal current regulation eliminating external sense resistors, automatic decay mode, fault reporting via open-drain nFAULT, and compatibility with 3.3V/5V logic interfaces.
Technical Context
The MP6500GU-Z integrates eight N-channel MOSFETs as two independent full-bridge drivers, each capable of ±2.5A output. Its constant off-time PWM current regulation uses an external ROSC resistor to set tOFF (20–26 µs typical) and an ISET resistor to define peak current (e.g., 1.0 A at RISET = 71 kΩ).
It implements automatic decay mode-starting in slow decay and switching to fast decay if current remains above trip threshold at end of tOFF. Step resolution is controlled by MS1/MS2 logic inputs, enabling discrete microstep sequences (4/8/16/32 steps per electrical cycle) with precise current amplitude mapping per Table 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 4.5V to 35V - Supports wide-input industrial and automotive auxiliary rails without external regulators. |
| Max output current per phase | ±2.5A - Sustained drive capability for NEMA 17–23 bipolar stepper motors under optimized thermal layout. |
| On-resistance (HS/LS) | 195 mΩ / 170 mΩ - Minimizes conduction loss and self-heating at rated load; measured at TJ = 25°C, IOUT = 1A. |
| Microstep modes | Full, half, quarter, eighth - Configurable via MS1/MS2 pins; enables 4–32 discrete positions per electrical cycle for smooth low-speed operation. |
| Fault protection | OCP, OVP (36–38.5V), UVLO (3.4–4.5V), thermal shutdown (165°C) - Autonomous safety response with nFAULT open-drain indicator. |
| Logic interface | 3.3V/5V compatible, internal pull-downs on DIR/nENBL/MS1/MS2 - Simplifies MCU interfacing without external biasing components. |
| Package | QFN-24 (5mm × 5mm, exposed pad) - Low thermal resistance (θJA = 36°C/W, θJC = 8°C/W) for high-power density PCB layouts. |
Pinout & Package
MP6500GU-Z is housed in a thermally enhanced QFN-24 (5mm × 5mm) package with an exposed thermal pad. Pin numbering follows standard JEDEC MO-220 orientation with Pin 1 marked by a top-side index area.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input; internal 500 kΩ pull-down; sets motor rotation polarity on each STEP edge. |
| 2 | nFAULT | Open-drain fault indicator; driven low during OCP/OVP/OTP/UVLO events; requires external pull-up. |
| 3 | ISET | Current programming node; connects to ground via resistor to set full-scale winding current (e.g., 71 kΩ → 1.0 A). |
| 4 | AGND | Analog ground reference for internal DAC, current sense, and regulation circuitry; must be star-connected to power ground. |
| 5 | ROSC | Constant off-time timing node; connects to ground via resistor to set PWM blanking and decay duration (e.g., 200 kΩ → 23 µs). |
| 6 | MS2 | Microstep mode select bit 1; internal pull-down; used with MS1 to configure step resolution (L/L = full, H/H = eighth). |
| 7 | MS1 | Microstep mode select bit 0; internal pull-down; pairs with MS2 for 4-mode selection per Table 1. |
| 8,12,20,24,EP | GND | Power ground terminals including exposed pad; all must be soldered to PCB ground plane for thermal and EMI performance. |
| 9 | BOUT1 | Bridge B output terminal 1; connects to one end of stepper motor phase B winding. |
| 10,22 | VIN | Main power input (4.5–35V); both pins require local 100nF ceramic decoupling to GND. |
| 11 | BOUT2 | Bridge B output terminal 2; connects to other end of stepper motor phase B winding. |
| 13 | STEP | Step clock input; rising edge advances translator state; minimum pulse width = 1 µs; internal pull-down. |
| 14 | VCP | Charge pump output; requires 1 µF/16V ceramic capacitor to VIN for high-side gate drive voltage generation. |
| 15 | CP2 | Charge pump capacitor terminal 2; connects to CP1 via 100nF ceramic capacitor rated for VIN voltage. |
| 16 | CP1 | Charge pump capacitor terminal 1; forms flying capacitor with CP2 for bootstrap gate drive. |
| 17 | VG | Low-side gate drive supply; requires 220nF/16V ceramic capacitor to AGND for stable LS-FET switching. |
| 18 | nENBL | Enable/disable control; active-low; disables H-bridges and translator when high; internal pull-down. |
| 19 | nSLEEP | Sleep mode control; active-low; halts charge pump and all internal circuitry to reduce quiescent current to 1 µA. |
| 21 | AOUT2 | Bridge A output terminal 2; connects to one end of stepper motor phase A winding. |
| 23 | AOUT1 | Bridge A output terminal 1; connects to other end of stepper motor phase A winding. |
Key Features
| Feature | Design Value |
|---|---|
| Internal current sensing | Eliminates need for external sense resistors, reducing BOM count, board space, and power loss in shunt paths. |
| Automatic decay mode | Dynamically selects slow/fast decay per PWM cycle based on real-time current level, improving torque consistency across speed ranges. |
| No separate logic supply required | Accepts 3.3V or 5V STEP/DIR/MSx signals directly-no level shifters or auxiliary LDO needed for MCU interfacing. |
| Integrated translator | Converts STEP/DIR inputs into precise phase current sequencing, removing requirement for external stepper sequencer IC or firmware state machine. |
| Fault reporting with nFAULT | Single open-drain output signals OCP/OVP/UVLO/OTP events, enabling system-level error logging and safe shutdown coordination. |
Applications
| Printer Paper Feed Mechanism | Lab Automation XYZ Stage |
|---|---|
|
Use Scenario: Precise bidirectional paper advancement and registration in inkjet/laser printers. IC Role / Device Role / Timing Role: Bipolar stepper driver controlling 2-phase hybrid stepper motor; executes microstepped motion commands from printer controller MCU. Use Value: Eighth-step mode enables <10 µm positioning resolution; internal current regulation maintains consistent torque across varying line voltages and ambient temperatures. |
Use Scenario: High-repeatability linear motion in robotic sample handling systems requiring sub-millimeter accuracy. IC Role / Device Role / Timing Role: Dual full-bridge driver powering NEMA 17 stepper motors on X/Y/Z axes; synchronized STEP pulses enable coordinated multi-axis movement. Use Value: Fault protection (OCP/OVP/thermal) prevents motor stall damage during jam events; QFN-24 package allows dense multi-driver PCB layouts. |
| CNC Milling Tool Changer | Medical Infusion Pump Actuator |
|
Use Scenario: Indexing rotary tool turret with 8–12 position stops in desktop CNC mills. IC Role / Device Role / Timing Role: Stepper motor driver executing full/half-step sequences per tool-change command; nENBL enables rapid motor disable between operations. Use Value: 35V max input supports 24V industrial bus; low RDS(on) (170–195 mΩ) minimizes heat rise during repeated short-duration moves. |
Use Scenario: Controlled syringe plunger advancement in programmable IV infusion pumps. IC Role / Device Role / Timing Role: Precision current-regulated driver for low-noise, vibration-free microstepping; nSLEEP reduces standby power during idle periods. Use Value: UVLO and thermal shutdown ensure fail-safe stop under brownout or blocked-rotor conditions; RoHS/lead-free/halogen-free compliance meets medical regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher voltage rating (44V), external current sense resistors required, no integrated translator, larger HTSSOP-28 package. | Suitable for higher-voltage industrial motors but increases BOM and layout complexity; lacks microstep auto-decay intelligence. | Select when >35V operation is mandatory and external current control is preferred for calibration flexibility. |
| DRV8825 | Lower max current (2.2A), same QFN-24 footprint, integrated translator and current regulation, but no OVP or nFAULT reporting. | Valid for cost-sensitive consumer-grade motion systems where input overvoltage risk is low and fault visibility is non-critical. | Choose for simpler designs where 35V OVP and dedicated fault signaling are not required, and thermal margin permits 2.2A limit. |
Compared with TB6600HG and DRV8825, MP6500GU-Z uniquely combines 35V operation, internal current sensing, comprehensive fault reporting (nFAULT), and automatic decay-all in a compact QFN-24 package-making it optimal for space-constrained, safety-aware industrial motion systems.
Availability
MP6500GU-Z is available at Aetrix Electronics and suitable for printer mechanisms, lab automation stages, CNC tool changers, and medical infusion pumps requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MP6500GU-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 across Asia and North America and global manufacturing partnerships.
The MP6500 product line targets cost-sensitive, space-constrained motion control applications-delivering integrated stepper drivers that eliminate external sense resistors, translators, and gate-drive support components while maintaining industrial-grade protection and thermal robustness.
FAQ
What is the maximum continuous output current per phase for MP6500GU-Z?
The MP6500GU-Z supports up to ±2.5A per phase under ideal thermal conditions-defined as 2-layer PCB with 2 oz copper, full thermal pad soldering, and ambient temperature ≤40°C. Actual current depends on PCB layout, heatsinking, and airflow; derating is required above 85°C junction temperature.
Does MP6500GU-Z require external current sense resistors?
No. The MP6500GU-Z uses internal MOSFET RDS(on)-based current sensing, eliminating external sense resistors. Current regulation is set via the ISET pin resistor (e.g., 71 kΩ for 1.0 A full-scale), and accuracy is specified at ±5% for 71–100% of trip level.
How does the automatic decay mode function in MP6500GU-Z?
The MP6500GU-Z begins each PWM off-time in slow decay. If current remains above the trip threshold at the end of that fixed off-time, it switches to fast decay for the remainder of the cycle. Once current drops below threshold, it reverts to slow decay-enabling adaptive torque maintenance across speeds and loads.
Can MP6500GU-Z operate with a 3.3V microcontroller interface?
Yes. All logic inputs (STEP, DIR, MS1, MS2, nENBL, nSLEEP) accept 3.3V-compatible high-level signals (VIH ≥ 2.1V) and include internal 500 kΩ pull-down resistors, allowing direct connection to 3.3V or 5V MCUs without level-shifting circuitry.
What thermal management is required for QFN-24 package operation at 2.5A?
At 2.5A continuous per phase, the QFN-24 package requires a minimum 250 mm² exposed thermal pad area connected to an internal or external ground plane via ≥6 thermal vias (0.3mm diameter). Thermal resistance must stay below θJA = 36°C/W to maintain TJ ≤ 125°C at 25°C ambient.
Is there a recommended startup sequence after nSLEEP deassertion?
Yes. After driving nSLEEP high to exit sleep mode, allow ≥1 ms before issuing the first STEP pulse. This ensures stabilization of the internal charge pump (VCP), gate drivers, and regulation circuitry-preventing missteps or transient current spikes.
How is over-current protection triggered and cleared?
OCP triggers when sensed current exceeds IOCP1/IOCP2 thresholds (3.5–8.5A) for longer than 1 µs deglitch time. Upon trigger, all bridges disable and nFAULT pulls low. Recovery is automatic after ~2.4 ms; no reset signal is required unless fault condition persists.
MP6500GU-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Logic
- Technology:
- Power MOSFET
- Step Resolution:
- 1, 1/2, 1/4, 1/8
- Applications:
- Printer
- Current - Output:
- 2.5A
- Voltage - Supply:
- 4.5V ~ 35V
- Voltage - Load:
- 3.3V, 5V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (5x5)
MP6500GU-Z FAQ
1.How can I place an order for MP6500GU-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6500GU-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP6500GU-Z reliable?
The price and inventory of MP6500GU-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6500GU-Z is usually 5 days.
3.What payment methods are accepted for MP6500GU-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6500GU-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6500GU-Z?
MP6500GU-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6500GU-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP6500GU-Z?
For technical support, including MP6500GU-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6500GU-Z requirements.
6.How does Aetrix verify that MP6500GU-Z is sourced from the original manufacturer or authorized distributors?
All MP6500GU-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP6500GU-Z meets industry standards.
7.What is the process for return or replacement of MP6500GU-Z?
All MP6500GU-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6500GU-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP6500GU-Z part is unused and in its original packaging.
Return procedure for MP6500GU-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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