General Description
The MAX4069–MAX4072 low-cost, bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. They feature up to 24V input common-mode voltage range, low 100µA supply current (which drops to only 10µA in shutdown), and a total output error of less than 1.5%. The wide 1.35V to 24V input common-mode range is independent of the supply voltage, ensuring that the current-sense feedback remains accurate even when connected to a battery pack in deep discharge.

Features
● Bidirectional, Compact, Current-Sense Solution
● Total Output Error Less than 1.5%
● Selectable Gain of 50V/V or 100V/V
● Wide 1.35V to 24V Common-Mode Range
   Independent of Supply Voltage
● 2.7V to 24V Single-Supply Operation
● Internal Precision Reference
   • Adjustable (MAX4069)
   • 2.50V (MAX4070)
   • 1.50V (MAX4071)
● Low 100μA Supply Current
● 10μA Supply Current in Shutdown
● Available in Space-Saving Packages
   • 8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
   • 8-Pin μMAX (MAX4070/MAX4071/MAX4072)
   • 10-Pin μMAX (MAX4069)
  
Applications
● Notebook Fuel Gauging
● Smart-Battery Packs/Chargers
● Motor Control
● Power-Management Systems
● Cell-Phone Battery-Current Monitoring