1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger IC
  5. Switching Battery Chargers
  6. MAX1757


Features and Benefits

  • Stand-Alone Charger Safely Charges Up to Three Li+ Batteries
    • Continuous Voltage and Temperature Monitoring
    • Input Current Limiting
    • ±0.8% Battery Regulation Voltage Accuracy
    • Up to 1.5A Programmable Charge Current
  • Low Power Consumption Extends Battery Life
    • 0.1µA Shutdown Battery Current
    • Low-Dropout 98% Duty Cycle
  • Flexible Input Voltage Range Enables the Use of Low Cost Wall Adapters
    • Input Voltage Up to 14V
    • Precharges Near-Dead Cells
  • Fixed 300kHz PWM Oscillator Allows Effective Noise Filtering
  • 28-Pin SSOP Package Saves Board Space

Product Details

The MAX1757 is a switch-mode lithium-ion (Li+) battery charger that charges one to three cells. It provides a regulated charging current accurate to ±10% and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The internal high-side switch delivers a programmable current of up to 1.5A to charge the battery. The built-in safety timer automatically terminates charging once the adjustable time limit has been reached.

The MAX1757 regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. An additional control loop monitors the total current drawn from the input source (charging + system) and by automatically reducing battery-charging current prevents overload of the input supply, allowing the use of a low-cost wall adapter.

The per-cell battery regulation voltage is set between 4.0V and 4.4V using standard 1% resistors. The number of cells is set from 1 to 3 by pin strapping. Battery temperature is monitored by an external thermistor to prevent charging outside the acceptable temperature range.

The MAX1757 is available in a space-saving 28-pin SSOP package. Use the MAX1757EVKIT to help reduce design time. For a stand-alone charger with a 28V switch, refer to the MAX1758 data sheet. For a charger controller capable of up to 4A charging current, refer to the MAX1737 data sheet.


  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Li+ Battery Packs
  • Notebook Computers
  • PDAs

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX1757EAI+ Material Declaration Reliability Data 28-SSOP-5.3_MM
MAX1757EAI+T Material Declaration Reliability Data 28-SSOP-5.3_MM
Wafer Fabrication Data MAX1757 Reliability Data

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