General Description

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 integrates a current-sense circuit, MOSFET pass element, thermal-regulation circuitry, and eliminates the external reverse-blocking Schottky diode to create the simplest and smallest charging solutions for handheld equipment.

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)

Applications

● Cellular and Cordless Phones

● Smart Phones and PDAs

● Digital Still Cameras

● MP3 Players

● USB Appliances

● Charging Cradles and Docks

● Bluetooth® Equipment