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

Monolithic Power Systems Inc. MP6606GF-Z

Name: MP6606GF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP6606GF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP6606GF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Motor Drivers, Controllers

Package:: 20-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: MP6606GF-Z.pdf

Description:: 60V, 0.75A, 8-CHANNEL SERIAL INT

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Product details

Overview

MP6606GF-Z from Monolithic Power Systems is an 8-channel low-side N-channel MOSFET driver IC with integrated clamp diodes, serial SPI interface (SDI/SCK/SDO/nSCS), and fault reporting (nFAULT). It operates from 4.5V to 60V input, delivers up to 750mA per channel (single-channel on), features 700mΩ R_DS(ON) at 25°C, and includes OCP, UVLO, thermal shutdown, and VCLAMP pin for inductive spike clamping. It targets unipolar stepper motor and solenoid drive applications in industrial motion control.

For engineers reviewing the MP6606GF-Z datasheet, MP6606GF-Z pinout, MP6606GF-Z application, or MP6606GF-Z equivalent, key selection criteria include its 60V max output voltage rating, 8-channel independent control via daisy-chainable SPI, latch-synchronized output update, open-drain nFAULT reporting, and thermally enhanced TSSOP-20EP package with exposed pad.

Technical Context

The MP6606 implements a serial shift-register architecture with synchronous latch control: data is clocked in via SDI/SCK while simultaneously shifted out through SDO, enabling multi-device daisy chaining. A rising edge on LATCH transfers register contents to output drivers, decoupling data loading from output activation.

Each of the eight low-side outputs integrates an N-MOSFET (700mΩ typical R_DS(ON)) and reverse-connected clamp diode tied to the VCLAMP pin. The VCLAMP node supports external TVS or direct VIN connection to clamp inductive kickback-critical for unipolar stepper half-winding switching where leakage inductance causes voltage spikes exceeding VIN.

Key Specifications

Parameter	Value and Actual Design Meaning
VIN Range	4.5V to 60V - Supports wide industrial supply rails including 12V, 24V, and 48V systems without external regulation.
Max Output Voltage	60V - Absolute maximum voltage at OUTx pins; enables direct driving of high-voltage solenoids and stepper windings.
R_DS(ON)	700 mΩ (typ) at 25°C - Determines conduction loss and thermal rise per channel; impacts PCB copper area requirements for 750mA continuous operation.
Output Current	750mA per channel (1 active), 500mA total (8 active) - Thermal derating reflects power dissipation limits in TSSOP-20EP package under real PCB conditions.
OCP Threshold	0.9A to 2.1A - Adjustable trip level with 3.5µs deglitch; prevents false triggering during inrush while protecting against sustained overloads.
Logic Compatibility	3.3V/5V Schmitt-trigger inputs - Ensures noise immunity and interoperability with microcontrollers and FPGAs across common logic families.
Clamp Diode Rating	750mA @ <20% duty cycle - Specifies safe energy dissipation capability of internal high-side diodes during inductive turn-off events.

Pinout & Package

The MP6606GF-Z is housed in a thermally enhanced TSSOP-20EP package with an exposed thermal pad (pin 11 and 20 are GND; pad must be soldered to PCB ground plane for thermal performance).

Pin/Terminal	Circuit Role	Design Meaning
1 nSCS	SPI chip select (active low)	Enables serial interface communication; internal pull-down ensures default disable when unconnected.
3 SDO	SPI data output (open-drain)	Supports daisy-chaining; requires external pull-up for logic-high state; outputs shifted-out data synchronously with SCK.
4 SDI	SPI data input	Accepts serial command bits; internal pull-down prevents floating state; sampled on SCK rising edge.
5 SCK	SPI clock input	Drives internal shift register; supports up to 10MHz clock rate; internal pull-down ensures idle-low default.
8 LATCH	Output update strobe	Rising edge transfers shift register contents to output drivers; decouples data loading from output activation timing.
9 ENBL	Global output enable	Logic high enables all 8 channels; logic low disables outputs while preserving serial interface functionality.
10 RESET	Digital logic reset	Active-high signal initializes internal registers and clears fault latches; internal pull-down ensures safe power-up state.
2 nFAULT	Fault indicator (open-drain)	Driven low during OCP, UVLO, or thermal shutdown; requires external pull-up; provides system-level fault signaling.
6 VCLAMP	Inductive energy clamp node	Collects flyback current from all 8 outputs; connects to TVS or VIN to limit output voltage to ≤60V during turn-off.
7 VIN	Main power input	Supplies gate drivers and logic; requires ≥100nF ceramic bypass capacitor close to pin; supports up to 60V.
12–19 OUT1–OUT8	Low-side output terminals	Eight independent N-MOSFET drains; each drives one side of unipolar stepper winding or solenoid coil to GND.
11,20 GND	Power ground	Primary return path for load current and internal circuitry; both pins plus exposed pad must connect to low-impedance ground plane.

Key Features

Feature	Design Value
Daisy-chainable SPI interface	SDO output enables cascading multiple MP6606 devices using single MCU SPI port-reduces GPIO count and simplifies firmware for multi-axis stepper control.
VCLAMP pin with external TVS support	Allows programmable clamp voltage above VIN (e.g., 24V TVS for 12V system), accelerating inductive current decay and improving step response in high-speed stepper applications.
Independent channel enable via ENBL	Permits global output disable without disrupting serial configuration-enables safe power sequencing, emergency stop, or dynamic channel grouping in motion profiles.
Integrated over-current protection with auto-retry	OCP disables all outputs for 2.5ms then automatically recovers-avoids latching faults during transient overloads while maintaining system autonomy.
Thermally optimized TSSOP-20EP package	θ_JA = 40°C/W on 4-layer PCB enables 3.1W continuous dissipation-supports full 8-channel operation at 500mA with proper thermal vias under exposed pad.

Applications

Unipolar Stepper Motor Control

Solenoid Valve Actuation

Use Scenario: Driving 4-phase unipolar stepper motors in CNC positioning stages, 3D printer extruders, and automated lab equipment.

IC Role / Device Role / Timing Role: Low-side switch for each motor winding half; VCLAMP manages leakage inductance spikes during phase commutation; LATCH synchronizes step transitions.

Use Value: Enables precise microstepping control via SPI register writes and eliminates need for discrete flyback diodes or external current sensing.

Use Scenario: Controlling industrial pneumatic/hydraulic solenoid valves in PLC I/O modules and process automation panels.

IC Role / Device Role / Timing Role: High-voltage (up to 60V) low-side driver for DC solenoid coils; nFAULT reports coil open-circuit or short-circuit faults to PLC controller.

Use Value: Reduces board space vs. discrete MOSFET + driver + protection solutions; built-in OCP prevents damage from stuck-armature or wiring faults.

Industrial PLC Output Modules

Automated Test Equipment (ATE) Load Switching

Use Scenario: Providing isolated digital output channels in DIN-rail mounted programmable logic controllers for factory floor machinery.

IC Role / Device Role / Timing Role: Eight independently controllable 60V/750mA outputs; ENBL allows group-enable/disable for safety interlocks; RESET supports cold-start initialization.

Use Value: Meets IEC 61000-4-5 surge immunity requirements when combined with external TVS on VCLAMP; simplifies certification for industrial environments.

Use Scenario: Switching precision resistive or inductive loads during functional testing of power supplies, battery chargers, and motor drivers.

IC Role / Device Role / Timing Role: Programmable load sink with fault feedback; SPI interface enables fast channel reconfiguration between test sequences; nFAULT triggers test abort on overload.

Use Value: Eliminates manual relay wiring changes; achieves sub-millisecond channel switching via LATCH synchronization; improves test throughput and repeatability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel low-side driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB9051FTG	48V max, 1.5A per channel, CAN FD interface, integrated current sense	Targeted at automotive body control; requires CAN transceiver and microcontroller with CAN peripheral	Choose for automotive-grade reliability and diagnostic depth; avoid if SPI-only interface and 60V operation are required.
TPIC6B595	50V max, 150mA per channel, no OCP or thermal shutdown, open-drain outputs	Designed for LED multiplexing; lacks clamp diodes, fault reporting, and robust protection	Use only for low-power resistive loads; unsuitable for inductive solenoids or steppers requiring flyback handling and fault resilience.

Compared with TB9051FTG and TPIC6B595, the MP6606GF-Z uniquely balances 60V operation, integrated clamp diodes, SPI daisy-chaining, and comprehensive protection-making it optimal for industrial motion control where voltage headroom, inductive energy management, and deterministic fault response are critical.

Availability

MP6606GF-Z is available at Aetrix Electronics and suitable for unipolar stepper motor control, solenoid valve actuation, industrial PLC output modules, and automated test equipment load switching requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP6606GF-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, motor drivers, and LED drivers, with design centers in the US, China, and Taiwan.

The MP6606 belongs to MPS's industrial-grade low-side driver product line, engineered specifically for robust, high-voltage inductive load control in motion systems-emphasizing integration, thermal efficiency, and fault resilience over cost-optimized consumer-grade alternatives.

FAQ

What is the maximum recommended PCB trace width and thermal via count for the exposed pad of MP6606GF-Z?

The exposed thermal pad (pins 11 and 20 plus center pad) must be connected to a solid internal or bottom-layer ground plane using ≥9 thermal vias (0.3mm diameter, spaced ≤1mm apart). Minimum copper area is 25 mm²; for 8-channel 500mA operation, use ≥40 mm² with 2oz copper to maintain junction temperature below 125°C at 70°C ambient.

Can MP6606GF-Z drive bipolar stepper motors?

No. The MP6606GF-Z integrates only low-side N-MOSFETs and clamp diodes-suitable exclusively for unipolar stepper configurations where windings have center taps referenced to VIN. Bipolar steppers require H-bridge topology with complementary high-side and low-side switches, which this device does not provide.

How does the VCLAMP pin behave when connected directly to VIN versus a TVS diode?

When VCLAMP connects directly to VIN, clamp voltage equals VIN + ~1.1V (body diode forward drop), limiting output voltage to VIN + 1.1V. With a TVS (e.g., 24V breakdown), output voltage clamps near the TVS breakdown voltage-allowing faster inductive current decay and higher peak voltage tolerance, but requiring careful TVS selection to stay within the 65V absolute max rating.

Is the SDO pin functional when only one MP6606GF-Z is used in the system?

Yes. Even in single-device configurations, SDO outputs the data shifted out of the internal 8-bit register during each SPI transaction. This enables read-back verification of register contents or daisy-chain readiness without requiring additional devices-though no downstream device is needed to terminate the signal.

What happens to the outputs during an over-current event, and how is recovery handled?

Upon detecting current exceeding the OCP threshold for >3.5µs, all eight outputs disable immediately and nFAULT pulls low. After a fixed 2.5ms retry delay, the device automatically re-enables outputs and attempts normal operation. If the fault persists, the cycle repeats-providing non-latching protection that avoids manual reset in transient overload conditions.

Does MP6606GF-Z require external pull-up resistors on any pins, and if so, which ones?

Yes: nFAULT and SDO are open-drain outputs and require external pull-up resistors (typically 4.7kΩ to 3.3V or 5V). nSCS, SDI, SCK, LATCH, RESET, and ENBL have internal pull-down resistors and do not require external biasing unless specific logic thresholds or noise immunity enhancements are needed.

Can the MP6606GF-Z operate with a 3.3V logic supply while powered from a 60V VIN rail?

Yes. The logic interface (SDI, SCK, nSCS, LATCH, RESET, ENBL) is fully compatible with 3.3V or 5V logic levels regardless of VIN voltage. Internal level-shifting circuitry isolates the digital inputs from the high-voltage power domain, enabling mixed-voltage system design without external translators.

MP6606GF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MP

Package/Case:: 20-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Motor Type - Stepper:: Unipolar

Motor Type - AC, DC:: -

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Low Side (8)

Interface:: Serial

Technology:: Power MOSFET

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 750mA

Voltage - Supply:: 4.5V ~ 60V

Voltage - Load:: 0V ~ 60V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP-EP

MP6606GF-Z FAQ

1.How can I place an order for MP6606GF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP6606GF-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 MP6606GF-Z reliable?

The price and inventory of MP6606GF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6606GF-Z is usually 5 days.

3.What payment methods are accepted for MP6606GF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6606GF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP6606GF-Z?

MP6606GF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP6606GF-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 MP6606GF-Z?

For technical support, including MP6606GF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6606GF-Z requirements.

6.How does Aetrix verify that MP6606GF-Z is sourced from the original manufacturer or authorized distributors?

All MP6606GF-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 MP6606GF-Z meets industry standards.

7.What is the process for return or replacement of MP6606GF-Z?

All MP6606GF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6606GF-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 MP6606GF-Z part is unused and in its original packaging.

Return procedure for MP6606GF-Z:

1.Submit a request within 90 days.

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

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