MAX8844Z

19-4279; Rev 0; 3/09 EVALUATION KIT AVAILABLE 28V Dual Input Linear Li+ Battery Chargers with Battery Detection and Overvoltage-Protected Output www.datasheet4u.com General Description Features ♦ CCCV, Thermally Regulated Linear One-Cell Li+ Battery Charger ♦ No External MOSFET, Reverse Blocking Diode, or Current-Sense Resistor ♦ Programmable Fast-Charge Currents (1ARMS max) ♦ Programmable Top-Off Current Threshold ♦ Input Overvoltage Protected 4.7V Output (SAFEOUT) from IN ♦ Input Overvoltage Protected 4.7V Output (SAFEUSB) from USB ♦ Proprietary Die Temperature Regulation Control (+115°C) ♦ 4.25V to 28V Input Voltage Range with Input Overvoltage Protection Above +7.5V ♦ Low-Dropout Voltage (300mV at 500mA) ♦ Input Power-Source Detection Output (POK), Charge Status Output (CHG), Charge-Enable Input (EN) ♦ Output for Autobooting (ABO, MAX8844Z) ♦ Output for Autobooting (ABO, MAX8844Y) ♦ Tiny 3mm x 3mm, 14-Pin TDFN Package, 0.8mm Height (max) MAX8844Z/MAX8844Y The MAX8844Z/MAX8844Y intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated dual input linear chargers are designed for charging a single-cell lithium-ion (Li+) battery. The MAX8844Z/MAX8844Y integrate a current-sense circuit, MOSFET pass element, thermal-regulation circuitry, and eliminate the external reverse-blocking Schottky diode to create the simplest and smallest charging solutions for handheld equipment. The IC controls the charging sequence from the prequalification state ...