Datasheet Analog Devices LTC4126 — Datenblatt

LTC4126
7.5mA Wireless Li-Ion Charger with
1.2V Step-Down DC/DC Converter
FEATURES DESCRIPTION Wireless Li-Ion Battery Charger Plus High
Efficiency Multi-Mode Charge Pump DC/DC
nn Wideband Rx Frequency: DC to >10MHz
nn Integrated Rectifier with Overvoltage Limit
nn Pin Selectable Charge Voltage: 4.2V or 4.35V
nn Charge Current: 7.5mA (Fixed)
nn Low Battery Disconnect: 3.0V
nn NTC Pin for Temperature Qualified Charging
nn DC/DC Regulated Output: 1.2V
nn DC/DC Output Current: Up to 60mA
nn 50kHz/75kHz Switching, No Audible Noise
nn Pushbutton and/or Digital on/off Control for DC/DC
nn Thermally Enhanced 12-Lead 2mm × 2mm LQFN
Package The LTC®4126 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 switching
frequency is set to either 50kHz or 75kHz depending on the
mode to keep any switching noise out of the audible range. APPLICATIONS The tiny 2mm × 2mm LQFN package and minimal external
component count make the LTC4126 well suited for Li-Ion …