Analog Devices LTC4126-ADJ

Description

The LT C®4126-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 multi-mode charge pump which is powered from the battery and provides a regulated 1.2V at the output. The switching frequency is set to either 50kHz or 75kHz depending on the mode to keep any switching noise out of the audible range.

Features

• Wireless Li-Ion Battery Charger Plus HighEfficiency Multi-Mode Charge Pump DC/DC
• Programmable Charge Current from 1mA to 50mAVia an External Resistor
• Wideband Rx Frequency: DC to >10MHz
• Integrated Rectifier with Overvoltage Limit
• Charge Voltage: 4.2V
• Low Battery Disconnect: 3.0V
• NTC Pin for Temperature Qualified Charging
• DC/DC Regulated Output: 1.2V
• DC/DC Output Current: Up to 60mA
• 50kHz/75kHz Switching, No Audible Noise
• Pushbutton and/or Digital on/off Control for DC/DC
• Thermally Enhanced 12-Lead 2mm × 2mm LQFN Package

Typical applications

• Hearing Aids, Low Power Li-Ion Powered Devices, Wireless Headsets, IoT Wearables

More information

• Datasheet
• IC product information