NMOS-NMOS Synchronous Buck Converter with 300 kHz Frequency and >95% Efficiency 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle High-Accuracy Voltage and Current Regulation ±0.5% Charge Voltage Accuracy ±3% Charge Current Accuracy ±3% Adapter Current Accuracy ±2% Input Current Sense Amp Accuracy Integration Input Current Comparator, With Adjustable Threshold and Hysteresis Internal Soft-Start Safety Input Overvoltage Protection (OVP) Dynamic Power Management (DPM) Up to 19.2 V Battery Voltage 6 V–24 V AC/DC-Adapter Operating Range Simplified SMBus Control Charge Voltage DAC (1.024 V–19.2 V) Charge Current DAC (128 mA–8.064 A) Adapter Current Limit DPM DAC (256 mA–11.004 A) Status and Monitoring Outputs AC/DC Adapter Present with Adjustable Voltage Threshold Input Current Comparator, With Adjustable Threshold and Hysteresis Current Sense Amplifier for Current Drawn From Input Source Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc. Cells Pin Supports Two to Four Li-Ion Cells Charge Enable Pin < 10-µBattery Current with Adapter Removed < 1 mA Input DCIN Current with Adapter Present and Charge Disabled 28-pin, 5x5-mm2 QFN Package APPLICATIONS Notebook and Ultra-Mobile Computers Portable Data-Capture Terminals Portable Printers Medical Diagnostics Equipment Battery Bay Chargers Battery Back-up Systems