MAX8606

19-3795; Rev 0; 8/05 KIT ATION EVALU E L B A IL AVA USB/AC Adapter, Li+ Linear Battery Charger with Integrated 50mΩ Battery Switch in TDFN General Description The MAX8606 complete 1-cell Li+ battery charge-management IC operates from either a USB port or AC adapter. It integrates a battery disconnect switch, current-sense circuit, PMOS pass element, and thermalregulation circuitry, while eliminating the external reverse-blocking Schottky diode, to create a simple and small charging solution. The charging sequence initiates from power-OK indication, through prequalification, fast-charge, top-off charge, and finally charging-complete indication for single-cell Li+ batteries. Charging is controlled using constant current, constant voltage, or constant die-temperature (CCCVCTJ) regulation for safe operation in handhelds. Two logic inputs (EN1 and EN2) select suspend mode, 100mA, 500mA, or ≤1A input current limits to suit USB requirements. Proprietary thermal-regulation circuitry limits the die temperature to +100°C to prevent excessive heat on the system PC board. Additional safety features include an NTC thermistor input (THM) and internal timers to protect the battery. A 3.5V to 4.2V SYS output, in conjunction with the low-R DSON battery switch, powers the system even when the battery is www.DataSheet4U.com deeply discharged or not installed. The IC also offers a +3.3V/500µA output (VL), a charging status flag (CHG), and an input-supply detection flag ( POK ). The MAX8606 ope...