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Monolithic Power Systems Inc. MP6500AGF-Z
- Part No.:
- MP6500AGF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP6500AGF-Z.pdf
- Description:
- 35V, 2.5A, STEP MOTOR WITH INTER
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
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Product details
Overview
MP6500AGF-Z from Monolithic Power Systems is a 35V, 2.5A bipolar stepper motor driver IC with integrated translator, internal current sensing (no external sense resistors), and programmable microstepping (full/half/quarter/eighth-step). It features dual full-bridge drivers, automatic decay mode, and operates from 4.5V–35V input. Used in precision motion control for printers, CNC stages, and lab automation equipment.
For engineers reviewing the MP6500AGF-Z datasheet, MP6500AGF-Z pinout, MP6500AGF-Z application, or MP6500AGF-Z equivalent, key selection criteria include its voltage-programmable current setting (0–2V VSET), thermal shutdown at 165°C, open-drain fault reporting (nFAULT), QFN-24/TSSOP-28EP package options, and compatibility with 3.3V/5V logic interfaces.
Technical Context
The MP6500AGF-Z implements constant-off-time PWM current regulation using an internal DAC and analog current-sense circuitry, eliminating external sense resistors. Its translator interprets STEP/DIR/MS1/MS2 inputs to sequence two independent full-bridge outputs (AOUT1/AOUT2, BOUT1/BOUT2) with precise microstep current profiles per Table 2 and Table 3.
Protection architecture includes independent over-current detection (3.5–8.5A trip), input OVP (36–38.5V), UVLO (3.4–4.5V), and thermal shutdown (165°C, 15°C hysteresis), all signaled via nFAULT. The charge pump (CP1/CP2/VCP) enables high-side N-MOSFET gate drive without bootstrap diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 35V - supports wide-input industrial and automotive power rails without external regulators. |
| Max Output Current | ±2.5A per bridge - delivers torque for NEMA 17–23 stepper motors under optimized PCB thermal design. |
| Microstep Resolution | Full / half / quarter / eighth-step - enables 32 microsteps per full step for smooth low-speed operation and reduced resonance. |
| VSET Input Range | 0V to 2V - sets peak winding current linearly (0.75 V/A ratio); replaces resistor-based current programming with voltage control. |
| On-Resistance (HS/LS) | 195 mΩ / 170 mΩ @ 25°C - minimizes conduction loss and self-heating during continuous 2.5A operation. |
| Fault Reporting | Open-drain nFAULT - asserts low on OCP/OVP/OTP/UVLO; requires external pull-up for system-level fault handling. |
| Thermal Shutdown | 165°C junction temperature - protects die during overload or poor heatsinking; auto-recovery after cooldown. |
Pinout & Package
TSSOP-28EP thermally enhanced package (9.7mm × 4.4mm × 1.2mm) with exposed pad for PCB heat dissipation. Pin mapping validated per MP6500A Rev. 1.1 datasheet Figure 1 and PIN FUNCTIONS table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17 (VG) | Low-side gate drive supply | Requires 220nF–1µF ceramic capacitor to GND; powers LS-FET drivers and charge pump bias. |
| 2, 18 (nSLEEP) | Sleep enable input | Active-high; internal pull-down; disables charge pump and H-bridges to reduce IQ to 1µA. |
| 3, 19 (nENBL) | Bridge output enable | Active-low; internal pull-down; halts STEP sequencing and disables A/B outputs when high. |
| 11, 1 (DIR) | Rotation direction control | Active-high sets forward rotation; internal pull-down ensures default direction on power-up. |
| 12, 2 (nFAULT) | Fault status indicator | Open-drain output; sinks current during OCP/OVP/OTP/UVLO; requires external pull-up resistor. |
| 13, 3 (VSET) | Current programming input | Analog voltage (0–2V) sets IPEAK = VSET / 0.75; replaces external RSET resistor used in MP6500. |
| 15, 5 (ROSC) | Constant off-time tuning | Resistor to GND sets tOFF (e.g., 200kΩ → 23µs); determines PWM frequency and current ripple. |
| 16, 6 & 17, 7 (MS2, MS1) | Microstep mode select | Logic pair selects step resolution (LL=full, LH=half, HL=quarter, HH=eighth); internal pull-downs. |
| 25, 13 (STEP) | Step clock input | Rising edge advances translator; min pulse width 1µs; 200ns setup/hold required relative to MSx/DIR. |
| 26–28, 14–16 (VCP, CP2, CP1) | Charge pump network | VCP outputs boosted gate drive voltage; CP1/CP2 require 100nF ceramic caps rated for VIN voltage. |
| AOUT1/AOUT2, BOUT1/BOUT2 | Bridge output terminals | Drive bipolar stepper windings; each pair handles ±2.5A with 195/170mΩ RDS(on) HS/LS MOSFETs. |
Key Features
| Feature | Design Value |
|---|---|
| Internal current sensing | Eliminates external sense resistors and associated PCB area/power loss; improves accuracy vs. layout-dependent shunts. |
| Automatic decay mode | Switches between slow and fast decay based on real-time current crossing ITRIP threshold; maintains regulation across load conditions. |
| Voltage-programmed current | VSET input (0–2V) provides precise, temperature-stable current setting without trimming resistors or DAC interface overhead. |
| Integrated translator logic | Accepts STEP/DIR/MS1/MS2 digital inputs to generate phase currents - removes need for external microcontroller sequencing firmware. |
| Thermally enhanced TSSOP-28EP | θJA = 32°C/W (4-layer PCB) enables 2.5A continuous operation with minimal heatsinking in space-constrained designs. |
Applications
| 3D Printer Motion Control | Lab Automation Stage Driver |
|---|---|
|
Use Scenario: Driving NEMA 17 stepper motors in Cartesian gantry systems for layer-by-layer deposition with sub-0.01mm positioning repeatability. IC Role / Device Role / Timing Role: Bipolar stepper driver with integrated translator; executes microstep sequences from MCU STEP pulses while regulating phase current to ±2.5A. Use Value: Eighth-step mode reduces vibration and audible noise during low-speed printing; internal current sensing eliminates calibration drift from external resistor tolerance. |
Use Scenario: Precision XY stage in automated electrophysiology rigs requiring smooth, jitter-free movement during cell patch clamping. IC Role / Device Role / Timing Role: Motor driver with automatic decay and programmable tOFF; maintains stable current waveform across varying load inductance and supply voltage. Use Value: 165°C thermal shutdown prevents damage during extended dwell periods; nFAULT pin enables real-time fault logging without host polling. |
| CNC Milling Axis Driver | Medical Imaging Scanner Actuator |
|
Use Scenario: Controlling Z-axis lead screw in desktop CNC mills where torque consistency affects surface finish quality at variable feed rates. IC Role / Device Role / Timing Role: Full-bridge driver with 4.5–35V input range; regulates winding current despite battery voltage sag or unregulated DC bus fluctuations. Use Value: Input OVP (36–38.5V) protects against transient spikes from inductive load switching; low RDS(on) (195/170mΩ) minimizes power loss at 2.5A continuous. |
Use Scenario: Linear actuator in portable ultrasound probe positioning systems requiring silent, EMI-clean motion during image acquisition. IC Role / Device Role / Timing Role: Stepper driver with no external sense resistors; avoids high-frequency noise injection into sensitive analog front-end circuits. Use Value: 3.3V/5V logic compatibility simplifies interface to low-power ARM Cortex-M MCUs; QFN-24 package enables compact PCB layout near motor connector. |
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 (45V), higher current (4A), but requires external current sense resistors and separate translator logic. | Used in high-torque industrial CNC; lacks integrated translator and voltage-programmed current setting. | Select when >2.5A peak current or >35V supply is required; accept added BOM cost and layout complexity. |
| DRV8825 | Lower max voltage (45V), lower current (2.2A), uses resistor-based current setting and fixed decay mode. | Common in hobbyist 3D printers; lacks automatic decay and thermal performance of MP6500AGF-Z. | Select for cost-sensitive, low-power applications where 2.2A limit and manual decay tuning are acceptable. |
Compared with TB6600HG and DRV8825, the MP6500AGF-Z offers superior integration (translator + current sense + voltage-programmed ISET), better thermal efficiency (32°C/W θJA), and smoother microstepping via automatic decay-making it optimal for compact, high-reliability motion systems.
Availability
MP6500AGF-Z is available at Aetrix Electronics and suitable for 3D printer motion control, lab automation stage drivers, and CNC milling axis drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP6500AGF-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, including DC/DC converters, LED drivers, and motor drivers.
The MP6500A product line targets cost-sensitive, space-constrained stepper motor applications requiring high integration, thermal robustness, and simplified system design-especially in industrial automation and precision instrumentation.
FAQ
What is the maximum continuous output current for MP6500AGF-Z?
The MP6500AGF-Z supports up to ±2.5A per bridge continuously, contingent on PCB thermal design (e.g., 4-layer board with 2oz copper and thermal vias to internal ground planes). At 25°C ambient and proper heatsinking, it sustains 2.5A without thermal shutdown; derating applies above 85°C junction temperature.
How does VSET voltage translate to motor current?
VSET sets peak winding current using IPEAK = VSET / 0.75 V/A. For example, 0.75V on VSET yields 1.0A peak current; 1.5V yields 2.0A. This ratio is specified over temperature (±5% accuracy at 71–100% of full scale) and eliminates resistor tolerance errors.
Can MP6500AGF-Z operate without external capacitors on CP1/CP2/VCP?
No. CP1 and CP2 require a 100nF ceramic capacitor rated for VIN voltage; VCP requires a 1µF/16V ceramic capacitor to VIN. Omitting these disables the charge pump, preventing high-side N-MOSFET turn-on and causing immediate bridge failure or erratic behavior.
What happens when nSLEEP is asserted low?
Asserting nSLEEP low disables the charge pump, halts all H-bridge outputs, and stops translator operation. Quiescent current drops to 1µA. After nSLEEP returns high, a 1ms stabilization delay is required before issuing the first STEP pulse to allow internal circuitry to reinitialize.
Is MP6500AGF-Z pin-compatible with MP6500?
No. While functionally identical except for current programming (VSET vs. RSET), MP6500AGF-Z repurposes the RSET pin as VSET and relocates ROSC to Pin 15 (TSSOP-28EP) versus Pin 14 on MP6500. PCB layout and schematic must be updated to match the MP6500A pinout.
Does MP6500AGF-Z support stall detection?
No. The device lacks dedicated stall detection circuitry such as back-EMF monitoring or current signature analysis. Fault reporting is limited to OCP, OVP, UVLO, and OTP via nFAULT; stall must be inferred externally using STEP timing anomalies or host-controller current profiling.
What is the minimum STEP pulse width supported?
The MP6500AGF-Z requires a minimum STEP high time (t1) and low time (t2) of 1µs each, per datasheet timing characteristics. Shorter pulses may cause missed steps or translator lockup; ensure MCU GPIO or FPGA logic meets this spec with margin.
MP6500AGF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (8)
- Interface:
- Logic
- Technology:
- Power MOSFET
- Step Resolution:
- 1, 1/2, 1/4, 1/8
- Applications:
- Printer, Stepper Motors
- Current - Output:
- 2.5A
- Voltage - Supply:
- 4.5V ~ 35V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
MP6500AGF-Z FAQ
1.How can I place an order for MP6500AGF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6500AGF-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 MP6500AGF-Z reliable?
The price and inventory of MP6500AGF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6500AGF-Z is usually 5 days.
3.What payment methods are accepted for MP6500AGF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6500AGF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6500AGF-Z?
MP6500AGF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6500AGF-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 MP6500AGF-Z?
For technical support, including MP6500AGF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6500AGF-Z requirements.
6.How does Aetrix verify that MP6500AGF-Z is sourced from the original manufacturer or authorized distributors?
All MP6500AGF-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 MP6500AGF-Z meets industry standards.
7.What is the process for return or replacement of MP6500AGF-Z?
All MP6500AGF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6500AGF-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 MP6500AGF-Z part is unused and in its original packaging.
Return procedure for MP6500AGF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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