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

Monolithic Power Systems Inc. MP6508GF-Z

Name: MP6508GF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP6508GF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP6508GF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Motor Drivers, Controllers

Package:: 16-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: MP6508GF-Z.pdf

Description:: IC MTR DRV BIPLR 2.7-18V 16TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP6508GF-Z from Monolithic Power Systems is a bipolar stepper motor driver IC with dual integrated N-channel full-bridge MOSFETs, operating from 2.7V to 18V and delivering up to 1.2A per channel. It features internal charge pump, 250mΩ high-side/low-side R_DS(on), over-current protection, thermal shutdown, and fault flag output. Used in POS printers and battery-powered camera pan-tilt mechanisms.

For engineers reviewing the MP6508GF-Z datasheet, MP6508GF-Z pinout, MP6508GF-Z application, or MP6508GF-Z equivalent, key selection criteria include its 1.2A per-phase current capability, dual full-bridge topology with synchronous rectification, sleep mode current of 1µA, and TSSOP-16 EP package with exposed thermal pad tied to GND.

Technical Context

The MP6508GF-Z implements two independent full-bridge drivers with integrated gate drivers, charge pump for high-side N-MOSFET biasing, and constant off-time (21–31µs) internal PWM current regulation. Current sensing uses external sense resistors (R_SENSE) referenced to 204mV typical V_REF, with 2.5–3µs blanking time to suppress switching noise.

It supports both external PWM control (via AIN1/AIN2/BIN1/BIN2 logic inputs) and internal current-loop regulation. Fault reporting is active-low on FAULT pin for over-temperature (165°C trip) and over-current events, with automatic recovery after 2ms OCP timeout and 15°C thermal hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7V to 18V - supports wide-input battery and industrial rail systems without external regulators
Output Current per Channel	1.2A continuous - sufficient for NEMA 8–11 stepper motors in compact motion systems
R_DS(on) (HS/LS)	250mΩ typ at 25°C - limits conduction loss to ≤360mW per FET at 1.2A
Quiescent Current	1.6mA - enables low-power operation when bridges are enabled but idle
Sleep Current	1µA - allows multi-month battery life in always-on portable devices
Fault Detection	OCP + OTP + UVLO - provides autonomous protection without host MCU intervention
Constant Off-Time	21–31µs - sets minimum decay period for stable microstepping at >1kHz step rates

Pinout & Package

MP6508GF-Z is housed in a thermally enhanced TSSOP-16 EP package (5.0mm × 6.4mm) with an exposed thermal pad on the backside electrically connected to GND for efficient heat dissipation in high-current operation.

Pin/Terminal	Circuit Role	Design Meaning
1 (AIN2)	Phase A bridge control input	Logic-level gate signal controlling AOUT2; used with AIN1 for full-step/half-step sequencing
2 (nSLEEP)	Global enable/sleep control	Active-high; pulls internal regulators and gate drivers offline when low, reducing supply current to 1µA
3 (SENA)	Phase A current sense input	Connects to external sense resistor (R_SENA) to feed current feedback into internal comparator
4 (AOUT2)	Phase A motor output terminal	Drives one end of stepper winding A; paired with AOUT1 to form full H-bridge
5 (BOUT2)	Phase B motor output terminal	Drives one end of stepper winding B; paired with BOUT1 to form second full H-bridge
6 (SENB)	Phase B current sense input	Connects to R_SENB; enables independent current regulation for winding B
7 (BOUT1)	Phase B motor output terminal	Complementary output to BOUT2; completes Phase B H-bridge
8 (FAULT)	Open-drain fault indicator	Asserts low during OCP or OTP; requires external pull-up for MCU interrupt detection
9 (BIN1)	Phase B bridge control input	Controls BOUT1; logic state determines direction and decay mode with BIN2
10 (BIN2)	Phase B bridge control input	Paired with BIN1 to define BOUT1/BOUT2 states per Table 1 (full-bridge truth table)
11 (BST)	Charge pump output	Drives external 10–100nF BST-to-VIN capacitor to generate gate drive voltage >VIN for high-side N-MOSFETs
12 (VIN)	Main power input	Supplies both power stage (2.7–18V) and internal LDO; requires local 10µF ceramic decoupling
13 (GND)	Power and signal reference	Common return for motor current, logic, and thermal pad; must be low-impedance plane
14 (VDD)	Internal logic supply	4.85V regulated output from internal LDO; powers control logic and gate drivers
15 (AIN1)	Phase A bridge control input	Controls AOUT1; defines winding polarity and decay behavior with AIN2
16 (AOUT1)	Phase A motor output terminal	Complementary output to AOUT2; completes Phase A H-bridge

Key Features

Feature	Design Value
Dual full-bridge topology	Two independent N-MOSFET H-bridges eliminate need for external gate drivers or discrete FETs
Integrated charge pump	Enables use of cost-effective N-channel MOSFETs on both high- and low-side switches
Synchronous rectification	Activates both low-side FETs during decay to reduce I²R loss vs. body-diode freewheeling
Programmable current limit	V_REF = 204mV ±15% sets I_LIMIT = V_REF/R_SENSE, enabling precise torque control
Fast wake-up from sleep	~0.75ms stabilization time after nSLEEP transition ensures responsive motor activation

Applications

POS Printers

Video Security Cameras

Use Scenario: Bidirectional paper feed and cutter actuation in compact thermal receipt printers.

IC Role / Device Role / Timing Role: Dual full-bridge driver executing half-step sequences to deliver precise 1.8° step resolution and smooth low-speed motion.

Use Value: 1.2A current headroom ensures reliable paper jam recovery; 1µA sleep current extends battery backup runtime during standby.

Use Scenario: Pan-tilt mechanism in indoor IP cameras requiring silent, jitter-free positioning.

IC Role / Device Role / Timing Role: Bipolar stepper controller managing coordinated A/B phase excitation for sub-degree angular accuracy.

Use Value: Low R_DS(on) minimizes self-heating during continuous tracking; fault flag enables automatic stall recovery without host polling.

Digital Still Cameras

Battery-Powered Toys

Use Scenario: Autofocus lens actuator in entry-level DSLR and mirrorless camera modules.

IC Role / Device Role / Timing Role: Precision current-regulated stepper driver supporting microstepping for sub-micron lens positioning.

Use Value: Internal PWM control eliminates need for external current-sense amplifiers; 2.7V min VIN enables direct Li-ion (3.0–4.2V) operation.

Use Scenario: Motion control in educational robotics kits and RC vehicles with limited PCB space.

IC Role / Device Role / Timing Role: Compact dual-H-bridge enabling independent drive of two DC motors or one bipolar stepper.

Use Value: TSSOP-16 EP package fits 10mm × 10mm footprints; UVLO prevents erratic behavior during brownout from alkaline battery discharge.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB6600HG	Higher 4.5A rating, larger HTSSOP-28 package, no integrated charge pump (requires external bootstrap diodes)	Better suited for NEMA 17+ motors; less suitable for space-constrained battery devices	Select when higher current and external component tolerance outweigh size and integration needs
DRV8825	Microstepping up to 1/32, 2.2A rating, requires external current-sense resistors and separate VREF setting	Preferred for high-resolution positioning; lacks integrated charge pump and sleep current optimization	Choose for precision motion where microstepping granularity matters more than quiescent power

Compared with TB6600HG and DRV8825, MP6508GF-Z offers superior integration (charge pump, LDO, fault flag), lowest sleep current (1µA), and smallest footprint (TSSOP-16 EP), making it optimal for battery-powered, space-limited stepper applications demanding reliability and low standby power.

Availability

MP6508GF-Z is available at Aetrix Electronics and suitable for POS printers, video security cameras, digital still cameras, and battery-powered toys requiring stable component supply across production lifecycles.

Supply support for MP6508GF-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 mixed-signal ICs for power management and motion control.

The MP6508 belongs to MPS's integrated motor driver product line, designed specifically for compact, energy-efficient bipolar stepper applications in consumer and industrial edge devices.

FAQ

What is the maximum motor supply voltage supported by MP6508GF-Z?

The MP6508GF-Z supports a continuous input voltage range of 2.7V to 18V on the VIN pin. Absolute maximum rating is 20V, but operation above 18V risks permanent damage and violates recommended operating conditions per the datasheet Rev. 1.0.

How does the internal current regulation work without external PWM signals?

The MP6508GF-Z uses constant off-time (21–31µs) internal PWM control. When winding current through R_SENSE reaches V_REF (204mV typ), the high-side FET turns off. Current freewheels via low-side FETs until the off-time expires, then the cycle repeats - enabling self-regulated current without host MCU timing overhead.

Can MP6508GF-Z drive two independent DC motors instead of a stepper?

Yes. The dual full-bridge architecture allows independent control of two DC motors: connect Motor 1 across AOUT1/AOUT2 and Motor 2 across BOUT1/BOUT2. Each bridge accepts standard H-bridge logic (AIN1/AIN2, BIN1/BIN2) for forward/reverse/brake operation.

What is the purpose of the BST pin and required external component?

The BST pin is the charge pump output that generates a voltage ≥VIN + 5V to fully enhance the high-side N-MOSFET gates. A 10nF–100nF ceramic capacitor must be placed between BST and VIN to sustain the bootstrap voltage during continuous high-side conduction.

Is the exposed thermal pad on the TSSOP-16 EP package required to be soldered to PCB ground?

Yes. The exposed pad is internally connected to GND and serves as the primary thermal path. It must be soldered to a solid GND copper pour using multiple thermal vias to meet θ_JA = 45°C/W and prevent thermal shutdown under 1.2A load conditions.

Does MP6508GF-Z support microstepping modes like 1/4 or 1/8 step?

No. The MP6508GF-Z supports only full-step and half-step excitation via external logic sequencing of AIN1/AIN2/BIN1/BIN2. Microstepping requires external current DACs or dedicated indexer ICs; this device lacks internal current interpolation circuitry.

What happens to motor outputs when nSLEEP is pulled low?

When nSLEEP is low, both full bridges are disabled (AOUT1/AOUT2/BOUT1/BOUT2 enter high-impedance state), the charge pump and gate drivers power down, and quiescent current drops to 1µA. Motor windings are electrically isolated; no holding torque is maintained.

MP6508GF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width) 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:: PWM

Technology:: Power MOSFET

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 1.2A

Voltage - Supply:: 2.7V ~ 18V

Voltage - Load:: -

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP-EP

MP6508GF-Z FAQ

1.How can I place an order for MP6508GF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP6508GF-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 MP6508GF-Z reliable?

The price and inventory of MP6508GF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6508GF-Z is usually 5 days.

3.What payment methods are accepted for MP6508GF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6508GF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP6508GF-Z?

MP6508GF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP6508GF-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 MP6508GF-Z?

For technical support, including MP6508GF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6508GF-Z requirements.

6.How does Aetrix verify that MP6508GF-Z is sourced from the original manufacturer or authorized distributors?

All MP6508GF-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 MP6508GF-Z meets industry standards.

7.What is the process for return or replacement of MP6508GF-Z?

All MP6508GF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6508GF-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 MP6508GF-Z part is unused and in its original packaging.

Return procedure for MP6508GF-Z:

1.Submit a request within 90 days.

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

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