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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Monolithic Power Systems Inc. MP6500AGF-P

Name: MP6500AGF-P
Brand: Monolithic Power Systems Inc.
SKU: MP6500AGF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP6500AGF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Motor Drivers, Controllers

Package:: 28-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: MP6500AGF-P.pdf

Description:: 35V, 2.5A, STEP MOTOR WITH INTER

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Product details

Overview

MP6500AGF-P 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, 195mΩ high-side and 170mΩ low-side MOSFET on-resistance, and operates across 4.5V–35V input range. Used in precision motion control for printers and automated lab equipment.

For engineers reviewing the MP6500AGF-P datasheet, MP6500AGF-P pinout, MP6500AGF-P application, or MP6500AGF-P equivalent, this page delivers verified electrical parameters, thermal shutdown behavior at 165°C, ROSC-based constant-off-time PWM tuning, VSET voltage-controlled current regulation (0–2V → 0–2.67A), and fault reporting via open-drain nFAULT.

Technical Context

The MP6500AGF-P implements a dual full-bridge architecture with eight N-channel power MOSFETs, enabling bidirectional current control per winding. Its translator logic accepts STEP/DIR/MS1/MS2 inputs to sequence phase currents without external microcontroller intervention.

Current regulation uses constant-off-time PWM with internal sensing, blanking time (2µs), and automatic decay mode-switching between slow and fast decay based on real-time winding current crossing the ITRIP threshold. Protection includes OCP (6A trip), OVP (37.5V threshold), UVLO (4.5V rising), and thermal shutdown (165°C).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4.5V to 35V - supports wide-input industrial and automotive-grade power rails without external regulators.
Max Output Current	±2.5A per bridge - sustained under optimized PCB thermal design (θJA = 32°C/W for TSSOP-28EP).
On-Resistance (HS/LS)	195mΩ / 170mΩ - reduces conduction loss and heat generation at 2.5A load.
Step Resolution	Full-, half-, quarter-, eighth-step - enables 32 microsteps per full electrical cycle for smooth, low-vibration motion.
VSET Input Range	0V to 2V - maps linearly to peak current (0–2.67A) using 0.75V/A scaling, eliminating calibration resistors.
Fault Reporting	Open-drain nFAULT - asserts low on OCP/OVP/OTP/UVLO, requiring external pull-up for system-level error handling.
Thermal Shutdown	165°C with 15°C hysteresis - prevents permanent damage during overload or poor heatsinking; auto-recovery on cooldown.

Pinout & Package

MP6500AGF-P is packaged in thermally enhanced TSSOP-28EP (9.7mm × 4.4mm × 1.2mm), featuring an exposed pad for improved thermal dissipation. Pin numbering follows standard JEDEC MO-153, variation AET.

Pin/Terminal	Circuit Role	Design Meaning
1 (DIR)	Direction control input	Logic level sets motor rotation direction; internal 500kΩ pull-down ensures default state on power-up.
2 (nFAULT)	Fault status output	Open-drain signal pulled low during OCP/OVP/OTP/UVLO; requires external 4.7kΩ pull-up to logic rail.
3 (VSET)	Current programming input	Analog voltage (0–2V) sets peak winding current; 0.75V/A ratio enables precise, resistor-free current calibration.
4 (AGND)	Analog ground reference	Separate ground for VSET, ROSC, and internal DAC to minimize noise coupling into current regulation loop.
5 (ROSC)	Constant-off-time timing	Resistor to GND (e.g., 200kΩ) sets tOFF ≈ 23µs; adjusts PWM frequency and current ripple trade-off.
6 (MS2), 7 (MS1)	Microstep mode selection	Binary pair selects step resolution (L/L = full, H/H = eighth); internal pull-downs prevent floating states.
8 (nSLEEP)	Sleep enable input	Logic high enables operation; low disables charge pump and bridges, reducing quiescent current to 1µA.
9 (nENBL)	Output enable control	Active-low; disables H-bridges and ignores STEP while preserving translator state for rapid re-enable.
10–12, 18–19, 24, EP (GND)	Power ground terminals	Multiple GND pins (including exposed pad) reduce impedance and improve thermal transfer to PCB copper.
13–14, 21–22 (VIN)	Main supply input	Four dedicated VIN pins must be shorted externally; decoupling requires ≥100nF ceramic per pin near package.
15 (AOUT1), 16 (AOUT2)	Bridge A output terminals	Drive one motor winding; rated for ±2.5A continuous with SOA-limited transient capability.
20 (BOUT1), 23 (BOUT2)	Bridge B output terminals	Drive second motor winding; identical specs to AOUTx; complementary switching enables bipolar excitation.
25 (STEP)	Step clock input	Rising edge advances translator state; minimum pulse width 1µs; 200ns setup/hold relative to MSx/DIR.
26 (VCP), 27 (CP2), 28 (CP1)	Charge pump network	VCP outputs boosted gate drive; CP1/CP2 require 100nF ceramic capacitor to sustain high-side FET turn-on.

Key Features

Feature	Design Value
Internal current sensing	Eliminates external sense resistors and associated PCB area, power loss, and layout sensitivity.
Automatic decay mode	Dynamically switches between slow and fast decay based on real-time current crossing ITRIP, optimizing torque and efficiency.
Voltage-programmed current	VSET input replaces fixed-current-setting resistors, enabling digital DAC or potentiometer-based current adjustment.
Integrated translator logic	Accepts STEP/DIR/MSx signals directly-no firmware or external sequencer required for microstepping control.
Comprehensive protection suite	OCP (6A), OVP (37.5V), UVLO (4.5V), thermal shutdown (165°C), and fault reporting via nFAULT ensure robust field operation.

Applications

Printer Paper Feed Mechanism

Lab Automation XYZ Stage

Use Scenario: Precise paper advancement and registration in inkjet and laser printers.

IC Role / Device Role / Timing Role: Bipolar stepper driver controlling 2-phase, 1.8° hybrid stepper motor; executes eighth-step sequences for sub-millimeter positioning accuracy.

Use Value: Eliminates external current-sense resistors and translator IC, reducing BOM count by 3–5 components and PCB footprint by >15%.

Use Scenario: High-repeatability linear motion in robotic sample handlers and microplate dispensers.

IC Role / Device Role / Timing Role: Dual-bridge driver powering NEMA17 stepper motors; uses DIR/STEP interface synchronized to host MCU timer interrupts.

Use Value: Internal 165°C thermal shutdown and OVP prevent motor stall-induced board damage during extended unattended operation.

CNC Router Z-Axis Control

Medical Infusion Pump Actuator

Use Scenario: Vertical axis positioning in desktop CNC mills with variable load inertia.

IC Role / Device Role / Timing Role: Full-bridge driver delivering 2.5A peak to 42mm frame stepper; ROSC-adjusted tOFF optimizes torque at 200–500pps.

Use Value: 195mΩ HS/170mΩ LS R_DS(on) limits junction temperature rise to <85°C at 2.5A/24V with 2oz copper.

Use Scenario: Syringe plunger actuation requiring smooth, vibration-free flow control in IV pumps.

IC Role / Device Role / Timing Role: Eighth-step driver regulating current via VSET voltage from DAC; nFAULT tied to safety controller for immediate stop on overcurrent.

Use Value: Automatic decay mode suppresses audible motor whine and mechanical resonance, critical for patient comfort and regulatory compliance.

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 (45V), but requires external current-sense resistors and separate translator logic; no VSET interface.	Used where higher bus voltage (>35V) or discrete control granularity is needed; lacks integrated microstepping logic.	Select when system already includes FPGA/microcontroller-based sequencing and needs >35V operation.
DRV8825	Lower max current (2.2A), same VREF-based current setting, but no OVP or thermal hysteresis; smaller QFN-24 package only.	Common in 3D printer mainboards; lacks input overvoltage protection critical for industrial power supplies with transients.	Prefer for cost-sensitive consumer electronics with stable 12–24V rails and existing VREF calibration infrastructure.

Compared with TB6600HG and DRV8825, MP6500AGF-P uniquely combines voltage-programmed current (VSET), integrated translator, and comprehensive protection (OVP+OTP+UVLO) in a single TSSOP-28EP package-reducing system-level design effort and improving field reliability.

Availability

MP6500AGF-P is available at Aetrix Electronics and suitable for printer paper feed mechanisms, lab automation XYZ stages, CNC router Z-axis control, and medical infusion pump actuators requiring stable component supply and long-term production continuity.

Supply support for MP6500AGF-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-efficiency power management ICs, including DC/DC converters, LED drivers, and motor drivers, with global manufacturing and quality certifications.

The MP6500 series targets cost-sensitive, space-constrained motion control applications-designed to replace multi-chip solutions with a single IC offering integrated translation, current regulation, and protection in compact packages.

FAQ

What is the maximum continuous output current of the MP6500AGF-P?

The MP6500AGF-P delivers up to ±2.5A per bridge continuously under proper thermal conditions: 4-layer PCB with 2oz copper, full GND plane, and ≤32°C/W junction-to-ambient thermal resistance. At 2.5A and 24V, power dissipation reaches ~1.8W; derating is required above 85°C ambient.

How does VSET control motor current, and what voltage range is supported?

VSET accepts 0V to 2V analog input, where peak current I_PEAK = V_SET / 0.75 V/A. For example, 1.5V on VSET sets 2.0A peak current. The relationship is linear and factory-trimmed; no external calibration is needed. Voltages beyond 2V do not increase current and may risk latch-up.

Can MP6500AGF-P operate without an external microcontroller?

Yes-the integrated translator accepts STEP, DIR, MS1, and MS2 logic inputs directly. A simple pulse generator and direction switch can fully control microstepping without firmware. The IC handles all phase sequencing, current regulation, and decay timing autonomously.

What is the purpose of the ROSC pin, and how is it configured?

ROSC sets the constant-off-time (t_OFF) of the PWM current regulator via an external resistor to GND. Using ROSC = 200kΩ yields t_OFF ≈ 23µs. This adjusts current ripple and effective chopper frequency-lower ROSC increases t_OFF, reducing ripple but limiting max step rate.

Does MP6500AGF-P include overvoltage protection, and what is its threshold?

Yes-input overvoltage protection (OVP) triggers at 37.5V (typical), disabling H-bridge outputs and asserting nFAULT low. The threshold has 1.9V hysteresis, releasing protection when VIN drops below 35.6V. This safeguards against 36V supply transients common in industrial 24V systems.

How does the automatic decay mode function during microstepping?

At each PWM cycle, the IC first applies slow decay. If winding current remains above I_TRIP at the end of t_OFF, it switches to fast decay for the next cycle. Once current falls below I_TRIP, it reverts to slow decay. This balances torque retention, power loss, and acoustic noise across all step modes.

Is the MP6500AGF-P RoHS-compliant and halogen-free?

Yes-MP6500AGF-P is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official website under Quality Assurance documentation, with material declarations available upon request.

MP6500AGF-P 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-P FAQ

1.How can I place an order for MP6500AGF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP6500AGF-P 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-P reliable?

The price and inventory of MP6500AGF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6500AGF-P is usually 5 days.

3.What payment methods are accepted for MP6500AGF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6500AGF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP6500AGF-P?

MP6500AGF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP6500AGF-P 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-P?

For technical support, including MP6500AGF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6500AGF-P requirements.

6.How does Aetrix verify that MP6500AGF-P is sourced from the original manufacturer or authorized distributors?

All MP6500AGF-P 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-P meets industry standards.

7.What is the process for return or replacement of MP6500AGF-P?

All MP6500AGF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP6500AGF-P, 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-P part is unused and in its original packaging.

Return procedure for MP6500AGF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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