LTC4126EV-ADJ#TRMPBF

LTC4126-ADJ is a low-power wireless single-cell Li-Ion battery charger with an integrated step-down DC/ DC regulator. The step-down regulator is a low-noise multimode charge pump which is powered from the battery and provides a regulated 1.2V at the output. The constant-current constant-voltage Li-Ion battery charger has automatic recharge, automatic termination by safety timer, and battery temperature monitoring via an NTC pin. Charge current is programmable from 1mA to 50mA via an external resistor. Undervoltage protection disconnects the battery from all loads when the battery voltage is below 3V. It is widely used in application such as hearing aids, low power Li-Ion powered devices, wireless headsets, IoT wearables etc.

• Wideband Rx frequency: DC to <gt/>10MHz
• Integrated rectifier with overvoltage limit
• Charge voltage is 4.2V
• Low battery alert 3 threshold is 3.2V typical
• DC/DC regulated output is 1.2V
• DC/DC output current upto 60mA
• Pushbutton and/or digital on/off control for DC/DC
• Charge current programmable, charge timer 6hours, EN pin polarity is active high
• NTC upper threshold is 76.5% of VCC
• Operating temperature is -20°C to 85°C, package style is 12-lead LQFN

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