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Monolithic Power Systems Inc. MP6600GR-Z
- Part No.:
- MP6600GR-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MP6600GR-Z.pdf
- Description:
- IC MTR DRVR BIPOLR 4.5-35V 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,764
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Product details
Overview
MP6600GR-Z from Monolithic Power Systems is a bipolar stepper motor driver IC with integrated translator, internal current sensing, and dual full-bridge output stage. It operates from 4.5V to 35V, delivers up to 1.5A per phase, supports full/half/quarter/eighth-step microstepping, and features OCP/OVP/UVLO/thermal shutdown - used in precision motion control for compact printers and automated lab equipment.
For engineers reviewing the MP6600GR-Z datasheet, MP6600GR-Z pinout, MP6600GR-Z application, or MP6600GR-Z equivalent, this page provides verified technical context, QFN-24 package mapping, real-world microstepping timing behavior, thermal derating guidance, and validated alternative drivers for stepper system design.
Technical Context
The MP6600GR-Z integrates two N-channel H-bridges (HS RDS(on) = 195 mΩ, LS RDS(on) = 170 mΩ @ 25°C) with programmable constant-off-time PWM current regulation using an external ROSC resistor and ISET resistor for trip-level setting. It uses automatic decay mode switching between slow and fast decay based on winding current crossing the ITRIP threshold at end-of-off-time.
Control logic includes DIR, STEP, MS1/MS2 for step resolution selection (full to 1/8-step), nENBL for output enable/disable, and nSLEEP for ultra-low-power state. Fault reporting is via open-drain nFAULT, asserting low on OCP (6 A trip), OVP (37.5 V threshold), UVLO (4.5 V rising), or thermal shutdown (165 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 35 V - supports wide-input industrial and 24 V DC bus systems without external regulators. |
| Output Current Capability | ±1.5 A per phase - sustained under PCB thermal design with ≥2.9 W power dissipation limit at +25°C ambient. |
| Step Resolution Modes | Full / half / quarter / eighth-step - enables 4–32 steps per electrical cycle for smooth torque and reduced vibration. |
| Internal MOSFET RDS(on) | HS: 195 mΩ, LS: 170 mΩ @ 25°C - reduces conduction loss and self-heating during high-current microstepping. |
| Current Regulation Accuracy | ±5% at 71–100% of full scale - ensures consistent phase current across temperature and supply variation. |
| Fault Protection Thresholds | OVP = 37.5 V, UVLO rising = 4.5 V, TSD = 165 °C - prevents damage from transient overvoltage, brownout, or thermal overload. |
| STEP Timing Requirement | Min pulse width = 1 µs, setup/hold = 200 ns - compatible with standard MCU GPIOs without timing margin constraints. |
Pinout & Package
MP6600GR-Z is housed in a thermally enhanced QFN-24 (4 mm × 4 mm) package with exposed thermal pad (EP) for PCB heat sinking. Pin numbering follows JEDEC MO-220 VGGD standard; top marking includes MPS prefix, year/week code, and lot number.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 DIR | Direction control input | Internal pull-down; sets motor rotation direction (CW/CCW) before each STEP edge. |
| 2 nFAULT | Fault status output | Open-drain signal pulled low on OCP/OVP/UVLO/OTP; requires external 4.7 kΩ pull-up to logic rail. |
| 3 ISET | Current programming node | Resistor-to-ground sets peak current (e.g., 71 kΩ → 1.0 A); voltage = 0.9 V ±0.1 V. |
| 4 AGND | Analog reference ground | Separate from power GND to minimize noise coupling into current-sense circuitry. |
| 5 ROSC | Constant off-time programming | Resistor-to-ground sets PWM off-time (e.g., 200 kΩ → 23 µs); determines current regulation frequency. |
| 6 MS2 / 7 MS1 | Microstep mode selection | Binary pair selects full/half/quarter/eighth-step; both have internal pull-down resistors. |
| 8,12,20,24,EP GND | Power ground terminals | Multiple GND pins and exposed pad reduce impedance and improve thermal transfer to PCB. |
| 9 BOUT1 / 11 BOUT2 | Bridge B output terminals | Drive one motor winding; rated for ±1.5 A continuous with proper PCB copper area. |
| 10,22 VIN | Main power input | Dual VIN pins require parallel connection and local 100 nF ceramic decoupling per pin. |
| 13 STEP | Step clock input | Rising-edge triggered; advances translator state; internal pull-down ensures safe default. |
| 14 VCP | Charge pump output | Drives gate of high-side MOSFETs; requires 1 µF ceramic capacitor to VIN. |
| 15 CP2 / 16 CP1 | Charge pump capacitor nodes | 100 nF ceramic cap connects CP1–CP2; critical for stable high-side gate drive voltage. |
| 17 VG | Low-side gate drive supply | Internal LDO output; requires 220 nF ceramic cap to AGND for ripple suppression. |
| 18 nENBL | Output enable control | Active-low; disables H-bridges and translator when high; internal pull-down for fail-safe off-state. |
| 19 nSLEEP | Ultra-low-power mode control | Active-low; stops charge pump and disables all logic; wake-up delay ≈1 ms before first STEP. |
| 21 AOUT2 / 23 AOUT1 | Bridge A output terminals | Drive second motor winding; identical rating and layout requirements as BOUT1/BOUT2. |
Key Features
| Feature | Design Value |
|---|---|
| No external current sense resistors | Reduces BOM count and PCB area; eliminates power loss and thermal drift errors from shunt resistors. |
| Automatic decay mode selection | Switches between slow and fast decay dynamically based on winding current crossing ITRIP, optimizing torque and reducing audible noise. |
| Integrated charge pump and gate drivers | Enables full N-channel H-bridge operation from single supply; eliminates need for external bootstrap components. |
| Programmable microstepping resolution | Four discrete modes (full to 1/8-step) set by MS1/MS2 logic levels - no firmware or external logic required. |
| Fault reporting with auto-recovery | nFAULT asserts low on fault; after 2.4 ms disable period, device resumes operation if condition clears - no host intervention needed. |
Applications
| Desktop 3D Printer Motion Control | Automated Laboratory Pipetting System |
|---|---|
|
Use Scenario: Precise X/Y/Z axis positioning of print head using 1.8° bipolar stepper motors. IC Role / Device Role / Timing Role: Stepper driver with integrated translator and current regulation - replaces discrete H-bridge + microcontroller logic. Use Value: Eighth-step mode enables 25,600 steps/rev resolution; internal current sensing eliminates shunt calibration; QFN-24 footprint saves board space vs. SOIC alternatives. |
Use Scenario: Controlled dispensing of microliter volumes via stepper-driven syringe pumps in diagnostic analyzers. IC Role / Device Role / Timing Role: Bipolar stepper motor driver with precise current regulation and fault monitoring - ensures repeatable fluid displacement accuracy. Use Value: ±1.5 A output sustains torque at low speeds; OVP/UVLO protection maintains reliability during lab power fluctuations; nFAULT alerts host on motor stall or wiring fault. |
| Industrial CNC Router Axis Driver | Medical Imaging Stage Positioner |
|
Use Scenario: High-reliability open-loop positioning of cutting tool along gantry rails using NEMA 17 stepper motors. IC Role / Device Role / Timing Role: Integrated stepper driver with thermal shutdown and automatic decay - manages heat buildup during extended duty cycles. Use Value: 35 V max input accommodates 24 V industrial supplies with margin; QFN thermal pad lowers junction temp by ~15°C vs. SOIC; 1 µs STEP pulse supports >1 MHz step rates. |
Use Scenario: Sub-micron positioning of X-ray detector arrays or optical sensors in portable imaging devices. IC Role / Device Role / Timing Role: Low-noise microstepping driver with quiet decay control - minimizes mechanical vibration that degrades image resolution. Use Value: Quarter-step mode achieves 12,800 steps/rev; automatic decay reduces audible coil whine; 3.3 V/5 V logic compatibility simplifies MCU interface. |
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 (45 V), higher current (4 A), but requires external current sense resistors and separate logic supply. | Better suited for high-torque NEMA 23+ motors; less suitable for space-constrained designs due to HTSSOP-28 package. | Select when >1.5 A or >35 V operation is required; accept added BOM cost and layout complexity. |
| DRV8825 | Lower max voltage (45 V), lower current (2.2 A), integrated current sense, but lacks OVP and has fixed decay mode. | Common in hobbyist 3D printers; limited fault coverage makes it less robust for medical or industrial use. | Select for cost-sensitive prototyping where OVP and auto-decay are non-critical; verify thermal performance at 1.5 A. |
Compared with TB6600HG and DRV8825, MP6600GR-Z offers best-in-class integration (no sense resistors, single-supply logic, OVP), optimal thermal performance in QFN-24, and automatic decay for low-noise operation - making it ideal for compact, reliable, and quiet stepper systems.
Availability
MP6600GR-Z is available at Aetrix Electronics and suitable for desktop 3D printer motion control, automated laboratory pipetting systems, industrial CNC router axis drivers, and medical imaging stage positioners requiring stable component supply across production lifecycles.
Supply support for MP6600GR-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 global manufacturing and quality certifications including ISO 9001 and AEC-Q200.
The MP6600 product line targets compact, high-efficiency stepper motor drives for space-constrained industrial, medical, and automation equipment - emphasizing integration, thermal efficiency, and robust protection.
FAQ
What is the maximum continuous output current per phase for MP6600GR-Z?
The MP6600GR-Z delivers up to ±1.5 A per phase continuously under typical PCB thermal design (4-layer board, 2 oz copper, 1 in² thermal pad). Derating applies above +25°C ambient: at +85°C, max current drops to ~1.0 A due to thermal shutdown threshold (165°C) and θJA = 42°C/W.
Does MP6600GR-Z require an external microcontroller to generate step pulses?
No - the MP6600GR-Z contains a fully integrated translator that sequences motor phases autonomously upon receiving STEP input pulses. A microcontroller only needs to provide DIR (direction) and STEP (clock) signals; MS1/MS2 configure microstep resolution without firmware involvement.
How does the internal current sensing work without external resistors?
The MP6600GR-Z uses MOSFET on-resistance (RDS(on)) of its internal power switches as current-sense elements. A dedicated current mirror circuit monitors voltage drop across the low-side FET during conduction, eliminating external shunts while maintaining ±5% regulation accuracy across temperature.
Can MP6600GR-Z operate with a 3.3 V logic supply?
Yes - all digital inputs (STEP, DIR, MS1, MS2, nENBL, nSLEEP) are 3.3 V and 5 V compatible, with VIH = 2.1 V min and VIL = 0.8 V max. No level-shifting is required when interfacing directly with 3.3 V MCUs such as STM32 or RP2040.
What happens during an over-voltage fault, and how is recovery handled?
When VIN exceeds 37.5 V, the MP6600GR-Z disables all H-bridge outputs and pulls nFAULT low. Recovery is automatic: once VIN falls below 36 V (1.5 V hysteresis), the device resumes normal operation after ~2.4 ms without host intervention or reset sequence.
Is thermal pad connection mandatory for reliable operation?
Yes - the exposed thermal pad (EP, Pin 24) must be soldered to a solid copper pour connected to GND for thermal and electrical integrity. Without proper thermal pad attachment, junction temperature rises significantly, triggering thermal shutdown at lower load currents and reducing long-term reliability.
How is microstepping resolution selected, and what are the timing implications?
MS1 and MS2 pins select full/half/quarter/eighth-step modes via static logic levels (L/L, L/H, H/L, H/H). No timing constraints apply to MSx changes - they are sampled asynchronously and take effect on the next STEP edge, enabling dynamic resolution switching during motion.
MP6600GR-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:
- 1.5A
- 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 (4x4)
MP6600GR-Z FAQ
1.How can I place an order for MP6600GR-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6600GR-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 MP6600GR-Z reliable?
The price and inventory of MP6600GR-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6600GR-Z is usually 5 days.
3.What payment methods are accepted for MP6600GR-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6600GR-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6600GR-Z?
MP6600GR-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6600GR-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 MP6600GR-Z?
For technical support, including MP6600GR-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6600GR-Z requirements.
6.How does Aetrix verify that MP6600GR-Z is sourced from the original manufacturer or authorized distributors?
All MP6600GR-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 MP6600GR-Z meets industry standards.
7.What is the process for return or replacement of MP6600GR-Z?
All MP6600GR-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6600GR-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 MP6600GR-Z part is unused and in its original packaging.
Return procedure for MP6600GR-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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