Compact 4.5V to 36V Full-Bridge DC Motor Drivers

Industry’s Smallest 4.5V–36V DC Brushed Motor Drivers/Relay Drivers

Please check latest availability status for a specific part variant.


The MAX14870/MAX14872 motor drivers provide a small, low-power and simple solution for driving and controlling brushed DC motors and relays with voltages between 4.5V and 36V. Very low driver on-resistance reduces power dissipation.

These drivers feature a charge-pump-less design for reduced external components and low supply current. Integrated fast-decay current regulation allows user-adjustable peak startup motor currents and requires minimal external components.

A separate voltage-sense input (SNS) reduces current sensing errors due to parasitic trace resistance.

The MAX14870/MAX14872 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 MAX14870 has PWM and direction-control inputs, while the MAX14872 has forward and reverse inputs for direction control. See the Function Tables in the data sheet.

The MAX14870 and MAX14872 are available in a 12-pin (3mm x 3mm) TDFN-EP package and operate over the -40°C to +85°C temperature range.

MAX14870, MAX14872: Typical Operating Circuit MAX14870, MAX14872: Typical Operating Circuit Enlarge+

Key Features

  • Small Package Handles High Power and Reduces Footprint Circuit Size
    • Up to 2.5A Peak Motor Current
    • Space-Saving TDFN-EP (3mm x 3mm) Package
    • Flexible 4.5V–36V Supply Enables Longer Runtime on Batteries
  • Low Power Consumption Runs Cooler and Longer
    • 280mΩ (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
  • Integrated Protection Provides Robust Driving Solution
    • Short-Circuit-Protected Drivers
    • Thermal-Shutdown Undervoltage Lockout
    • Diagnostic Active-Low FAULT Output
    • -40°C to +85°C Temperature Range


  • Printers and Scanners
  • Relay Drivers
  • 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
MAX14870 2.54.536410110DIR
Yes-40 to +85
$1.58 @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.

MAX14870EVKIT: Evaluation Kit for MAX14870 and MAX14872

Technical Documents

User Guide 6162 Using the MAX14870EVKIT with Software
Request Reliability Report for: MAX14870 
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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