The MAX1757EAI+ is a stand-alone, switch-mode, Li+ battery charger with internal 14V switch in 28 pin SSOP package. This device charges one to three lithium-ion 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 1.5A to charge the battery. The built-in safety timer automatically terminates charging once the adjustable time limit has been reached. 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.