MAX1757EAI+

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.

• Continuous voltage and temperature monitoring
• Input current limiting
• Low power consumption extends battery life
• 0.1µA shutdown battery current
• Low dropout, 98% duty cycle
• Input voltage up to 14V
• Pre-charges near-dead cells
• Fixed 300KHz PWM oscillator allows effective noise filtering
• Operating temperature range from -40°C to 85°C

Applications

Power Management, Portable Devices

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party