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Analog Devices Inc./Maxim Integrated MAX22201ATC+T
- Part No.:
- MAX22201ATC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX22201ATC+T.pdf
- Description:
- 36V BRUSHED DC MOTOR DRIVER WITH
- Quantity:
- Payment:
- Shipping:
Inventory:2,175
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Product details
Overview
MAX22201ATC+T from Analog Devices is a 36V, 3.5A peak full-bridge brushed DC motor driver in a 3mm × 3mm TDFN-EP package, featuring integrated non-dissipative current sensing (ICS), configurable current drive regulation (CDR), and 0.3Ω typical total RDS(ON). It delivers 2A RMS continuous drive on JEDEC 4-layer PCBs at +25°C ambient and supports motor startup/stall protection via programmable tOFF decay timing.
For engineers reviewing the MAX22201ATC+T datasheet, MAX22201ATC+T pinout, MAX22201ATC+T application, or MAX22201ATC+T equivalent, key selection criteria include its 3.5A peak OCP threshold, 20μs default tOFF (configurable via ROFF pin), ISEN analog current monitor output, fault-indicating open-drain FAULT pin, and compatibility with PWM-based speed/torque control in space-constrained industrial actuators and portable medical devices.
Technical Context
The MAX22201ATC+T implements a single-channel H-bridge with complementary high-side and low-side MOSFETs, controlled by dual CMOS logic inputs (IN1/IN2) supporting forward, reverse, brake (slow decay), and coast states. Its embedded CDR loop actively regulates peak output current by forcing fixed-duration slow-decay cycles when sensed current exceeds the ILIM-set ITRIP threshold.
Current sensing uses lossless sense-FET architecture monitoring both low-side FETs during energizing and brake phases, delivering a scaled replica (KISEN = 5000 A/A) to the ISEN pin. The device integrates a charge pump for gate drive, LDO-regulated V18 (1.8V ±3.2%), UVLO (2.67–3.0V), thermal shutdown at +165°C, and 8kV HBM ESD protection on OUT1/OUT2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VM = 3V to 36V - supports wide-input industrial and battery-powered systems without external regulators. |
| Peak Output Current | 3.5A - maximum transient current limited by overcurrent protection; defines short-duration torque capability during stall/startup. |
| RMS Output Current | 2A - sustained current rating on JEDEC 4-layer board at +25°C ambient; thermally constrained by θJA = 41°C/W. |
| Total RDS(ON) | 0.3Ω (typ) - sum of high-side + low-side FET on-resistance at +25°C; enables >90% efficiency at 2A load. |
| Current Sense Accuracy | ±3% (IOUT = 0.8–2A) - tight tolerance ensures reliable closed-loop torque control and overcurrent detection. |
| tOFF Timing | 20μs (typ, unconnected ROFF) - fixed decay interval during CDR activation; programmable from 10–80μs via external resistor. |
| Operating Temperature | −40°C to +125°C - qualified for automotive under-hood and industrial motor-control environments. |
Pinout & Package
Package: TDFN-EP, 12-pin, 3mm × 3mm, exposed pad (GNDP). Thermal resistance θJA = 41°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | CMOS PWM Inputs | Dual logic interface defining H-bridge state: forward (1,0), reverse (0,1), brake (1,1), coast/sleep (0,0 >2.2ms). |
| OUT1 / OUT2 | Power Outputs | High-current terminals driving brushed DC motor windings; rated for 36V max, 3.5A peak, 8kV HBM ESD. |
| ILIM | Analog Current Limit Input | Connects external resistor (18–250kΩ) to set ITRIP per KILIM = 50kV; enables precise stall-current tuning. |
| ROFF | Analog tOFF Configuration Input | Resistor-to-GND sets decay time (10–80μs); unconnected defaults to 20μs - unique to MAX22201 variant. |
| ISEN | Current Monitor Output | Sources scaled replica current (IOUT/5000); converts to voltage via external RISEN for ADC feedback. |
| FAULT | Open-Drain Fault Indicator | Active-low signal asserted on OCP, TSD, or UVLO; requires external pullup for system-level fault reporting. |
| VM | Main Power Supply | 3–36V input requiring local 1μF ceramic + 47μF bulk bypassing; powers bridge, gate drivers, and internal LDO. |
| GNDP / GNDA | Power Grounds | Exposed pad (GNDP) must be soldered to PCB ground plane; GNDA provides analog reference for ISEN/ILIM/ROFF. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Current Sensing (ICS) | Eliminates external shunt resistors, saving >5mm² PCB area and reducing power loss by up to 2W at 2A vs. 5mΩ shunt. |
| Configurable Current Drive Regulation (CDR) | Prevents destructive inrush during motor stall/startup by enforcing controlled slow-decay cycles instead of hard current limiting. |
| Programmable tOFF Decay Timing | Enables optimization of torque ripple and thermal performance: shorter tOFF improves response; longer tOFF reduces peak FET stress. |
| Ultra-Small TDFN12 Package | 3mm × 3mm footprint with exposed thermal pad achieves 41°C/W θJA, enabling compact designs in handheld tools and robotics. |
| Comprehensive Protection Suite | OCP (3.5A), TSD (+165°C), UVLO (2.67V), and 8kV HBM on outputs ensure robust operation in noisy, high-voltage motor environments. |
Applications
| Medical Infusion Pumps | Industrial Linear Actuators |
|---|---|
|
Use Scenario: Precise volumetric delivery of IV fluids using micro-stepped brushed DC motors with real-time torque monitoring. IC Role / Device Role / Timing Role: Full-bridge driver with integrated ISEN feedback and CDR limiting to prevent occlusion-induced motor stall damage. Use Value: Eliminates need for external current-sense amplifiers and shunts, reducing BOM count by 3 components while maintaining ±3% current accuracy for FDA-compliant dose control. |
Use Scenario: Position-controlled valve actuation in factory automation systems requiring rapid direction reversal and stall immunity. IC Role / Device Role / Timing Role: H-bridge controller implementing brake (slow decay) PWM with programmable tOFF to minimize mechanical jerk during direction changes. Use Value: 20μs default tOFF ensures smooth torque transition; ROFF configurability allows fine-tuning for specific motor inductance to reduce audible noise and coil heating. |
| Portable Power Tools | Automotive HVAC Dampers |
|
Use Scenario: High-torque, battery-powered drills and drivers where thermal management and runtime efficiency are critical. IC Role / Device Role / Timing Role: Motor driver with 2A RMS capability and 0.3Ω RDS(ON) minimizing conduction losses in 12–24V Li-ion systems. Use Value: Achieves >92% efficiency at 2A, extending tool runtime; sleep mode (6.5μA) preserves battery during idle periods between trigger pulls. |
Use Scenario: Climate-control air flap positioning in automotive cabins using 12V brushed motors subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust motor driver operating across −40°C to +125°C junction range with fault reporting via FAULT pin to vehicle ECU. Use Value: Integrated UVLO (2.67V) prevents erratic behavior during cold cranking; TSD hysteresis (30°C) avoids thermal cycling in confined dash cavities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushed DC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | 40V, 3.5A peak; SPI-configurable registers; no integrated ISEN output; larger HTSSOP-20 package (6.5mm × 6.4mm). | Requires external current-sense amplifier and shunt; better suited for systems needing diagnostic registers and CAN/LIN communication. | Choose TB9051FTG if SPI configuration and automotive ASIL-B compliance are required; avoid if PCB space or analog current feedback is critical. |
| DRV8876N | 45V, 3.6A peak; integrated current sense with 10× lower scaling factor (KISEN = 500 A/A); same 3mm × 3mm WQFN package. | Delivers higher ISEN output current (e.g., 4mA at 2A), easing ADC interfacing but increasing ISEN trace sensitivity to noise. | Choose DRV8876N if higher ISEN signal amplitude simplifies noise-immune layout; verify thermal margin as θJA = 49°C/W is 20% higher than MAX22201ATC+T. |
Compared with TB9051FTG and DRV8876N, the MAX22201ATC+T uniquely combines ultra-compact TDFN packaging, ±3% current-sense accuracy, and user-programmable tOFF decay timing-enabling superior thermal efficiency and torque control resolution in size-constrained, analog-feedback-driven motor systems.
Availability
MAX22201ATC+T is available at Aetrix Electronics and suitable for medical infusion pumps, industrial linear actuators, portable power tools, and automotive HVAC dampers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX22201ATC+T 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX22201ATC+T belongs to the MAX222xx family of highly integrated motor drivers designed specifically for space- and power-sensitive brushed DC motor applications in medical, industrial, and automotive end equipment.
FAQ
What is the maximum continuous current the MAX22201ATC+T can deliver without derating?
The MAX22201ATC+T delivers 2A RMS continuously on a standard JEDEC 4-layer PCB at +25°C ambient temperature. This rating assumes proper thermal design including soldering the exposed GNDP pad to a large copper plane. At higher ambient temperatures or with reduced copper area, derating is required per θJA = 41°C/W - for example, at +70°C ambient, maximum RMS current drops to ~1.4A to maintain <+125°C junction temperature. Always validate thermal performance in the final layout using the device's actual power dissipation profile.
How does the ROFF pin affect motor control behavior in the MAX22201ATC+T?
The ROFF pin on the MAX22201ATC+T configures the fixed off-time (tOFF) used during current drive regulation (CDR) events. When left unconnected, tOFF defaults to 20μs (typ); connecting a resistor from ROFF to GND adjusts tOFF from 10μs to 80μs. A shorter tOFF allows faster current recovery and higher effective PWM frequency, improving dynamic response; a longer tOFF reduces peak FET stress and torque ripple but may limit maximum achievable speed. This adjustment is exclusive to the MAX22201ATC+T and not available on MAX22202/MAX22207 variants.
Can the MAX22201ATC+T be used without external current-sense resistors?
Yes - the MAX22201ATC+T features fully integrated, lossless current sensing (ICS) that eliminates the need for external shunt resistors. The internally sensed current is provided as a proportional analog output on the ISEN pin (scaling factor KISEN = 5000 A/A). To convert this to a measurable voltage, only a single external resistor (RISEN) is required between ISEN and GND. For example, with a 2.5kΩ resistor and 2A motor current, the ISEN pin produces 1V - directly compatible with most microcontroller ADCs. No additional op-amps or precision amplifiers are needed.
What happens when both IN1 and IN2 are held low on the MAX22201ATC+T?
When both IN1 and IN2 are held low for longer than 2.2ms (tSLEEP), the MAX22201ATC+T enters low-power sleep mode. In this state, OUT1 and OUT2 are three-stated (high-impedance), all internal circuitry except bias references is disabled, and supply current drops to ≤6.5μA. Sleep mode reduces system standby power significantly. To exit sleep mode, drive both IN1 and IN2 high for at least 400μs (tON), after which the device resumes normal H-bridge operation with full current capability and protection functions active.
Does the MAX22201ATC+T support fast-decay motor control modes?
No - the MAX22201ATC+T only supports slow-decay (brake) and coast modes via its IN1/IN2 interface. Fast-decay operation is not implemented in the MAX22201ATC+T's control logic or gate driver architecture. During current drive regulation (CDR), the device enforces slow-decay by activating both low-side FETs for the programmed tOFF duration. If fast-decay functionality is required, consider the MAX22202 variant, which uses PHASE/ENBL/MODE inputs and supports synchronous fast-decay via MODE pin control - but note that fast-decay disables current sensing on the ISEN pin.
MAX22201ATC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN 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 (2)
- Interface:
- PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 3.5A
- Voltage - Supply:
- 3V ~ 36V
- Voltage - Load:
- 3V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX22201ATC+T FAQ
1.How can I place an order for MAX22201ATC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22201ATC+T 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 MAX22201ATC+T reliable?
The price and inventory of MAX22201ATC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22201ATC+T is usually 5 days.
3.What payment methods are accepted for MAX22201ATC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22201ATC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22201ATC+T?
MAX22201ATC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22201ATC+T 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 MAX22201ATC+T?
For technical support, including MAX22201ATC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22201ATC+T requirements.
6.How does Aetrix verify that MAX22201ATC+T is sourced from the original manufacturer or authorized distributors?
All MAX22201ATC+T 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 MAX22201ATC+T meets industry standards.
7.What is the process for return or replacement of MAX22201ATC+T?
All MAX22201ATC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22201ATC+T, 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 MAX22201ATC+T part is unused and in its original packaging.
Return procedure for MAX22201ATC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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