Power Drivers for Peltier TEC Modules

Smallest, EMI Optimized TEC Controller, Internal FETs, 0.01°C Temperature Control

Please check latest availability status for a specific part variant.


The MAX1968/MAX1969 are highly integrated and cost-effective, high-efficiency, switch-mode drivers for Peltier thermoelectric cooler (TEC) modules. Both devices utilize direct current control to eliminate current surges in the TEC. On-chip FETs minimize external components while providing high efficiency. A 500kHz/1MHz switching frequency and a unique ripple cancellation scheme reduce component size and noise.

The MAX1968 operates from a single supply and provides bipolar ±3A output by biasing the TEC between the outputs of two synchronous buck regulators. Bipolar operation allows for temperature control without "dead zones" or other nonlinearities at low load currents. This arrangement ensures that the control system does not hunt when the set point is very close to the natural operating point, requiring a small amount of heating or cooling. An analog control signal precisely sets the TEC current. The MAX1969 provides unipolar output up to 6A. Reliability is optimized with settable limits for both TEC voltage and current, with independently set limits for heating and cooling current. An analog output also monitors TEC current.

The MAX1968/MAX1969 are available in a low-profile 28-pin TSSOP-EP package and is specified over the -40°C to +85°C temperature range. The thermally-enhanced TSSOP-EP package with exposed metal pad minimizes operating junction temperature. An evaluation kit is available to speed designs.
MAX1968, MAX1969: Typical Operating Circuit MAX1968, MAX1969: Typical Operating Circuit Enlarge+

Key Features

  • High Accuracy and Adjustability Improves System Performance by Optimizing TEC Operation
    • Direct Current Control Prevents TEC Current Surges
    • Ripple Cancellation for Low Noise
    • No Dead-Zone or Hunting at Low-Output Current
    • 1% Accurate Voltage Reference
    • Adjustable TEC Voltage Limit
    • Separately Adjustable Heating and Cooling Current Limits
    • ITEC Output Provides Proportional Voltage to TEC Current for Monitoring
  • High-Efficiency Switch-Mode Design
    • On-Chip Power MOSFETs Improve Efficiency While Reducing External Components
    • 500kHz/1MHz Switching Frequency
  • Choose from ±3A Output Current (MAX1968) or 6A Output Current (MAX1969)
  • Thermally Enhanced TSSOP-EP Package Minimizes Operating Junction Temperature


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See parametric specs for Multifunction PMICs (83)

Part NumberVIN
Step-Down OutputsInverting Outputs
MAX1968 35.511

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.

MAX1968EVKIT: Evaluation Kit for the MAX1968
Product Reliability Reports: MAX1968.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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