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Analog Devices Inc./Maxim Integrated MAX22202ATC+
- Part No.:
- MAX22202ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX22202ATC+.pdf
- Description:
- 36V DC MOTOR DRIVER CURRENT SENS
- Quantity:
- Payment:
- Shipping:
Inventory:421
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Product details
Overview
MAX22202ATC+ from Analog Devices is a 36V, 3.5A peak full-bridge brushed DC motor driver in a TDFN12 3mm × 3mm package, featuring integrated lossless current sensing (ICS), configurable current drive regulation (CDR), and active fault reporting via open-drain FAULT pin. It delivers 2A RMS continuous current on JEDEC 4-layer PCBs at +25°C ambient and supports ENBL/PHASE/MODE control for forward/reverse/brake/fast-decay operation in compact industrial actuators and portable power tools.
For engineers reviewing the MAX22202ATC+ datasheet, MAX22202ATC+ pinout, MAX22202ATC+ application, or MAX22202ATC+ equivalent, key selection considerations include its 0.3Ω typical RDS(ON), programmable ILIM-based current limit (3.5A peak), ISEN analog current monitor output, thermal shutdown at +165°C, and compatibility with 3–36V supply rails in space-constrained motor-control designs.
Technical Context
The MAX22202ATC+ implements a fully integrated H-bridge with dual low-RON MOSFETs (0.15Ω HS + 0.15Ω LS typ), a dedicated charge pump for high-side gate drive, and embedded current regulation logic that enforces slow-decay decay mode when motor current exceeds the ILIM-set ITRIP threshold. Its ENBL/PHASE/MODE interface enables four distinct bridge states - forward, reverse, brake (slow decay), and fast-decay synchronous rectification - with MODE pin toggling determining decay behavior.
Current sensing occurs exclusively during energizing (forward/reverse) and brake phases using sense-FET techniques; no external shunt is required. The ISEN pin outputs a scaled replica (KISEN = 5000 A/A) of sensed current, supporting real-time torque feedback to MCU ADCs. Fault detection includes overcurrent protection (OCP) with 1.24–2μs blanking time, undervoltage lockout (UVLO) at 2.67–3.0V, and thermal shutdown at +165°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VM = 3V to 36V - supports wide-input battery-powered and industrial 24V systems without external regulators. |
| Peak Output Current | 3.5A - maximum short-transient current limited by OCP; usable for motor startup/stall without external current limiting. |
| RMS Continuous Current | 2A - sustained current capability on standard JEDEC 4-layer board at +25°C ambient; derates with temperature and layout. |
| Total RDS(ON) | 0.3Ω (HS + LS typ at +25°C) - enables high-efficiency operation with <1.5W conduction loss at 2A. |
| Current Sense Accuracy | ±3% (IOUT = 0.8–2A) - enables precise closed-loop torque control using ISEN voltage feedback. |
| Fault Response Time | tOCP = 1.24–2μs blanking - suppresses false triggering during PWM switching transients while ensuring fast overcurrent shutdown. |
| Thermal Shutdown Threshold | +165°C with 30°C hysteresis - protects die integrity under overload or poor heatsinking; automatic recovery after cooldown. |
Pinout & Package
MAX22202ATC+ is housed in a thermally enhanced TDFN12 (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad (GNDP). Pin 1 is ILIM; pin 12 is FAULT. All pins are CMOS-compatible with 0.8V/2.0V logic thresholds and 100kΩ internal pulldowns on IN/ENBL/PHASE/MODE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Current Limit Programming Input | Connects external resistor (18–250kΩ) to set ITRIP per KILIM = 50kV; disables CDR if 14kΩ used. |
| ENBL (Pin 5) | Enable Logic Input | Active-high enable; drives bridge into high-Z coast when low; initiates sleep mode after tSLEEP = 2.2ms. |
| PHASE (Pin 4) | Direction Control Input | High = forward (OUT1=H, OUT2=L); low = reverse (OUT1=L, OUT2=H); state ignored when ENBL=0. |
| MODE (Pin 6) | Decay Mode Select | High = brake/slow decay; low = fast-decay synchronous rectification; triggers sleep on high→low transition after brake. |
| FAULT (Pin 12) | Open-Drain Fault Indicator | Asserts low on OCP, UVLO, or TSD; requires external pullup; debounced for system-level fault logging. |
| ISEN (Pin 8) | Current Monitor Output | Sources IOUT/5000 (e.g., 400μA at 2A); connects to GND via RISEN for ADC-compatible voltage feedback. |
| VM (Pin 11) | Main Power Supply Input | Accepts 3–36V; requires local 1μF ceramic + 47μF bulk capacitor; powers gate drivers and LDO. |
| V18 (Pin 4 on MAX22201/22207 only) | Not present | MAX22202 does not include V18 LDO output; separate 1.8V rail must be supplied externally if needed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Lossless Current Sensing | Eliminates external shunt resistors, saving >5mm² PCB area and reducing power loss by up to 1.5W at 2A. |
| Configurable Current Drive Regulation | ILIM resistor sets precise ITRIP (e.g., 25kΩ → 2A); prevents destructive inrush during motor stall without software intervention. |
| Three-State Decay Control | MODE pin selects between slow-decay (brake) for efficiency or fast-decay (synchronous rectification) for dynamic response. |
| Ultra-Small Thermally Optimized Package | TDFN12 3×3mm with exposed GNDP pad achieves θJA = 41°C/W on 4-layer board - enables fanless 2A operation. |
| Comprehensive Fault Protection | Single-pin FAULT output reports OCP, UVLO, and TSD events with hardware-level response - no firmware dependency. |
Applications
| Power Tool Actuators | Industrial Valve Positioners |
|---|---|
|
Use Scenario: Cordless drill/driver with variable-speed trigger and electronic stall protection. IC Role / Device Role / Timing Role: Full-bridge driver controlling brushed motor direction and speed via PHASE/ENBL PWM; CDR limits startup current to prevent battery sag and MOSFET overheating. Use Value: Enables compact 18V/20V MAX tool designs with 2A continuous torque delivery and automatic stall recovery without microcontroller current-loop overhead. |
Use Scenario: Pneumatic/hydraulic valve actuator requiring precise 0–100% stroke control and fail-safe hold-on-power-loss. IC Role / Device Role / Timing Role: Motor driver powering bidirectional latching solenoid; FAULT pin signals overtemperature or supply brownout to PLC safety controller. Use Value: Replaces discrete H-bridge + shunt + comparator solutions, reducing BOM count by 7 parts and improving position repeatability via ISEN-based torque feedback. |
| Medical Infusion Pumps | Automotive HVAC Dampers |
|
Use Scenario: Battery-operated syringe pump delivering precise fluid flow rates with occlusion detection. IC Role / Device Role / Timing Role: Brushed motor driver with ISEN monitoring motor current ripple to detect tubing blockage; CDR maintains safe pressure ramp-up during priming. Use Value: Achieves Class II medical device compliance with single-chip current sensing accuracy (±3%) and fault-reporting latency <2μs. |
Use Scenario: In-vehicle climate control damper with position feedback and EMI-tolerant operation near engine bay. IC Role / Device Role / Timing Role: Motor driver operating from 12V vehicle battery; ROFF-equivalent fixed tOFF ensures consistent decay timing across temperature; FAULT pin interfaces with CAN bus diagnostic module. Use Value: Meets ISO 7637-2 pulse immunity requirements via integrated charge pump and robust 8kV HBM ESD protection on OUT1/OUT2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushed motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | 40V, 3.5A peak; SPI-configurable registers; no integrated ISEN output; requires external shunt for current feedback. | Preferred for automotive ASIL-B systems needing diagnostics and register visibility; lacks analog ISEN simplicity. | Select TB9051FTG when functional safety certification (ISO 26262) and programmable fault masking are required. |
| DRV8876N | 45V, 3.6A peak; integrated current sense with 10× lower scaling (KISEN = 500 A/A); no MODE pin - fixed slow/fast decay via PHASE polarity. | Better suited for cost-sensitive consumer appliances where simplified control and lower ISEN gain reduce ADC resolution burden. | Choose DRV8876N when board space allows larger HTSSOP package and design prioritizes lowest BOM cost over layout density. |
Compared with TB9051FTG and DRV8876N, the MAX22202ATC+ uniquely combines ultra-compact TDFN packaging, analog ISEN output with 5000× scaling for high-resolution torque sensing, and hardware-enforced CDR - making it optimal for space-constrained, precision-current-feedback applications where SPI overhead or external shunts are unacceptable.
Availability
MAX22202ATC+ is available at Aetrix Electronics and suitable for industrial valve actuators, portable power tools, medical infusion pumps, and automotive HVAC dampers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX22202ATC+ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX22202ATC+ belongs to Analog Devices' MAX Motor Driver family - engineered specifically for compact, efficient, and intelligent brushed DC motor control in thermally constrained environments where integrated current sensing and autonomous fault handling are critical.
FAQ
What is the maximum continuous current rating of the MAX22202ATC+ under real-world conditions?
The MAX22202ATC+ supports 2A RMS continuous current when mounted on a standard JEDEC 4-layer PCB at +25°C ambient temperature. Actual operating current depends on thermal design - adding copper pour, thermal vias, or airflow can extend this rating. At +70°C ambient, derating begins at 24.4mW/°C above junction temperature, limiting practical use to ~1.5A without additional cooling. Always verify thermal performance using θJA = 41°C/W in your specific layout before finalizing the MAX22202ATC+ design.
How does the MAX22202ATC+ implement current drive regulation without an external sense resistor?
The MAX22202ATC+ uses internal sense-FET technology to monitor current flowing through both low-side MOSFETs during energizing and brake phases. This lossless method eliminates external shunts while maintaining ±3% accuracy (0.8–2A range). The sensed current feeds a closed-loop regulator that forces slow-decay operation for a fixed tOFF when exceeding the ILIM-set ITRIP. No external components are needed - just a resistor from ILIM to GND sets the trip point per Equation 1 (ITRIP = 50kV / RILIM).
Can the MAX22202ATC+ be used in fast-decay mode, and how is it enabled?
Yes - the MAX22202ATC+ supports fast-decay synchronous rectification via the MODE pin. When MODE = 0 and ENBL = 0, the device enters fast-decay mode: OUT1 and OUT2 alternate between high-Z and complementary states to actively commutate motor current. This reduces decay time versus slow-decay brake mode, improving dynamic response in high-inertia loads. Note that ISEN current monitoring is disabled during fast decay, and CDR regulation is inactive - fast decay operates only under direct PWM control.
What happens to the MAX22202ATC+ outputs during a fault condition such as overcurrent or thermal shutdown?
Upon detecting OCP, UVLO, or TSD, the MAX22202ATC+ immediately disables all gate drivers and forces OUT1 and OUT2 into high-impedance (three-state) mode. Simultaneously, the open-drain FAULT pin pulls low and remains asserted until the fault clears and VM rises above UVLO threshold. After thermal shutdown, the device stays latched off until junction temperature falls below (165°C – 30°C) = +135°C. Recovery is automatic - no reset pin or command is required. This behavior ensures fail-safe motor stoppage in the MAX22202ATC+.
Is the MAX22202ATC+ pin-compatible with other devices in the MAX2220x family, such as MAX22201 or MAX22207?
No - the MAX22202ATC+ is not pin-compatible with MAX22201 or MAX22207. While all three share the same TDFN12 package footprint and core pin functions (VM, GND, OUT1, OUT2, FAULT, ISEN, ILIM), their control interface pins differ: MAX22202 uses ENBL/PHASE/MODE (Pins 5/4/6), whereas MAX22201 uses IN1/IN2/ROFF (Pins 5/6/2) and MAX22207 uses IN1/IN2/CDROUT (Pins 5/6/2). Swapping packages requires PCB layout revision. Always verify pin mapping against the MAX22202ATC+ specific datasheet before substitution.
MAX22202ATC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- 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:
- On/Off
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- DC Motors, General Purpose, Stepper Motors
- Current - Output:
- 3.5A
- Voltage - Supply:
- 3V ~ 36V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-TDFN-EP (3x3)
MAX22202ATC+ FAQ
1.How can I place an order for MAX22202ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22202ATC+ 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 MAX22202ATC+ reliable?
The price and inventory of MAX22202ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22202ATC+ is usually 5 days.
3.What payment methods are accepted for MAX22202ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22202ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22202ATC+?
MAX22202ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22202ATC+ 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 MAX22202ATC+?
For technical support, including MAX22202ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22202ATC+ requirements.
6.How does Aetrix verify that MAX22202ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX22202ATC+ 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 MAX22202ATC+ meets industry standards.
7.What is the process for return or replacement of MAX22202ATC+?
All MAX22202ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22202ATC+, 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 MAX22202ATC+ part is unused and in its original packaging.
Return procedure for MAX22202ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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