4.5V to 36V Full-Bridge DC Motor Driver

Industry’s Simplest and Most Flexible 4.5 to 36V DC-Brushed Motor Driver

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The MAX14871 DC motor driver provides a low-power and simple solution for driving and controlling brushed motors with voltages between 4.5V and 36V. Very low driver on resistance reduces power during dissipation.

The MAX14871 features a charge-pump-less design for reduced external components and low supply current. Integrated current regulation allows user-defined peak startup motor currents and requires minimal external components.

The MAX14871 includes 3 modes of current regulation: fast decay, slow decay, and 25% current ripple modes. Current regulation based on 25% ripple simplifies the design and enables regulation independent of motor characteristics. A separate voltage sense input (SNS) reduces current-sensing errors due to parasitic trace resistance.

The MAX14871 features shoot-through protection and internal free-wheeling diodes that absorb inductive motor currents. Driver outputs are short-circuit-protected from shorts to ground, to the supply, and between M1 and M2. An active-low FAULT output signals thermal overload and overcurrents during fault conditions.

The MAX14871 is available in a 16-pin TSSOP-EP package and operates over the -40°C to +85°C temperature range.
MAX14871: Typical Operating Circuit MAX14871: Typical Operating Circuit Enlarge+

Key Features

  • Drive More Power and Reduce Footprint
    • Up to 2.8A Peak Motor-Current Package
    • Flexible 4.5V–36V Supply Enables Longer Runtime
  • Low Power Consumption Runs Cooler and Longer
    • 334mΩ (typ) Total Bridge On-Resistance
    • 1mA (typ) Supply Current at 30kHz/24V
    • 10µA (max) Standby Current at 12V
  • Simplified Designs Reduces Time to Market
    • Charge-Pump-Less Architecture
    • Current Regulation Only Requires a Sense Resistor
    • Current-Sense Input Simplifies PCB Layout
    • Internal/External VREF for Current Regulation
    • Fast/Slow/25% Ripple Current Regulation Modes
  • Integrated Protection Provides Robust Driving Solutions
    • Short-Circuit-Protected Drivers
    • Thermal Shutdown Undervoltage Lockout
    • Diagnostic Active-Low FAULT Output
    • -40°C to +85°C Temperature Range


  • Industrial Automation
  • Printers and Scanners
  • Vending and Gaming Machines

See parametric specs for DC Motor Drivers (4)

Part NumberPeak Motor Current
Total RON
ICC (Shutdown)
Direction ControlCurrent RegulationInternal CR ReferenceOper. Temp.
minmaxtyptypmaxSee Notes
MAX14871 2.84.536334110DIR
25% Ripple
Yes-40 to +85
$1.73 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX14871EVKIT: Evaluation Kit for MAX14871
Product Reliability Reports: MAX14871.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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