Advanced Smart Battery-Pack Controller

Smallest, Lowest Power Consumption Battery-Pack Controller Integrates a User-Programmable Microcontroller Core, a Coulomb-Counting Fuel Gauge, a Multichannel Data-Acquisition Unit, and an SMBus v1.1-Compliant Master/Slave SMBus Interface

Please check latest availability status for a specific part variant.


The MAX1788 smart battery-pack controller integrates a user programmable microcontroller core, a Coulomb-counting fuel gauge, a multi-channel data-acquisition unit, protection drivers, and SMBus™ v1.1 compliant master/slave SMBus interface. The 8-bit RISC microcontroller core integrates 8k bytes of user programmable flash and an 8k byte ROM library. This provides battery-pack designers with complete flexibility in developing fuel gauging and control algorithms. The MAX1788 is equipped with ISD (In System Debug) capability for efficient firmware development and debugging.

The MAX1788 includes a 12-bit data-acquisition unit to measure individual cell voltages, thermistors, instantaneous current and pack voltage. Individual cell voltage measurements with 0.5% accuracy and overcurrent protection to provide first level protection. Internally adjustable over-current thresholds and delay timers provide a flexible solution.

The integrating fuel gauge module has a typical input offset of 1µV, and gain accuracy of better than 1% with no trimming required during pack manufacture. The MAX1788 has a wide 4V to 25V operating voltage range, and is available in a 28 pin TSSOP. The MAX1788 EvKit, development tools and reference design are available.

Key Features

  • Accurate Fuel Gauge Uses V-to-F Method
  • 8-Bit RISC Core
  • 12-Bit ADC
  • Built-In Protection MOSFET Drivers
  • SMBus v1.1 Compliant

Quality and Environmental Data

Product Reliability Reports: MAX1788.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

Quality Management System >
Environmental Management System >

Related Resources

PMIC with Ultra-Low IQ Voltage Regulators, Buck-Boost for Optical Sensing and Charger for Small Lithium Ion Systems

  • Extend Battery-Use Time Between Charging
  • Easy to Implement Li+ Battery Charging
  • Optimize System Control

Wearable Charge Management Solution

  • Extend System Use Time Between Battery Charging
  • Easy-to-Implement Li+ Battery Charging
  • Minimize Solution Footprint Through High Integration

5.2µA 1-Cell Fuel Gauge with ModelGauge m5 EZ and Internal Current Sensing

  • ModelGauge m5 EZ
  • Low 5.2µA Operating Current
  • Integrated Current Sensing

USB Charger Detection with Integrated Overvoltage Protection

  • Consumes Less Power
  • Delivers USB Compliance and Flexibility
  • Facilitates System Design

Ultra-Low Power PMIC with 3-Output SIMO, 150mA LDO, and Power Sequencer

  • Compact, High-Efficiency Power Solution
  • 3-Output SIMO Extends Battery Life
  • Low Quiescent Current

Ultra-Low Power PMIC with 3-Output SIMO, 150mA LDO, and Power Sequencer

  • Compact, High-Efficiency Power Solution
  • 3-Output SIMO Extends Battery Life
  • Low Quiescent Current

Single/Multi-Cell Fuel Gauge with ModelGauge m5 EZ and Integrated LED Control

  • ModelGauge m5 EZ
  • Monitors Single Cell or Multiple-Series Cell Battery Pack
  • Integrated LED Control with Push-Button Input