MAX8844Z Datasheet | Maxim Integrated

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 (300m V at 500m A) - 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 through constant current fast-charge, top-off charge, and full-charge indication. Proprietary thermal-regulation circuitry limits the die temperature during fast-charging or when the IC is exposed to high ambient temperatures, allowing maximum charging current without damaging the IC. The MAX8844Z/MAX8844Y achieve high flexibility by providing adjustable fast-charge currents (SETI) and an adjustable top-off current threshold (MIN) through external resistors. The IC features a booting assistant circuit that distinguishes input sources and battery connection and provides an enable signal (ABO, ABO) for system booting. The ICs also integrate two input overvoltage-protect...