1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger IC
  5. Switching Battery Chargers
  6. MAX1873


Features and Benefits

  • Low-Cost and Simple Circuit
  • Charges 2-, 3-, or 4-Series Lithium-Ion Cells
  • AC Adapter Input-Current-Limit Loop
  • Also Charges Ni-Based Batteries
  • Analog Output Monitors Charge Current
  • ±0.75% Battery-Regulation Voltage
  • 5µA Shutdown Battery Current
  • Input Voltage Up to 28V
  • 200mV Dropout Voltage/100% Duty Cycle
  • Adjustable Charging Current
  • 300kHz PWM Oscillator Reduces Noise
  • Space-Saving 16-Pin QSOP
  • MAX1873 Evaluation Kit Available to Speed Designs

Product Details

The low-cost MAX1873R/S/T provides all functions needed to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up to 4A or more. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P-channel MOSFET operates in a step-down DC-DC configuration to efficiently charge batteries in low-cost designs.

The MAX1873R/S/T regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analog voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current.

The MAX1873 may also be used as an efficient current-limited source to charge NiCd or NiMH batteries in multichemistry charger designs. The MAX1873R/S/T is available in a space-saving 16-pin QSOP package. Use the evaluation kit (MAX1873EVKIT) to help reduce design time.


  • 2-, 3-, or 4-Cell Li+ Battery Pack Chargers
  • 6-, 9-, or 10-Cell Li+ Battery Pack Chargers
  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Notebook Computers
  • Portable Desktop Assistants (PDAs)
  • Portable Internet Tablets

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.

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
MAX1873REEE+ Material Declaration Reliability Data 16-QSOP-150_MIL
MAX1873REEE+T Material Declaration Reliability Data 16-QSOP-150_MIL
MAX1873SEEE+ Material Declaration Reliability Data 16-QSOP-150_MIL
MAX1873SEEE+T Material Declaration Reliability Data 16-QSOP-150_MIL
MAX1873TEEE+ Material Declaration Reliability Data 16-QSOP-150_MIL
MAX1873TEEE+T Material Declaration Reliability Data 16-QSOP-150_MIL
Wafer Fabrication Data MAX1873 Reliability Data

PCN-PDN Information

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Sample & Buy

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Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

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