MAX8808X/MAX8808Y/MAX8808Z 19-3670 Rev 0 4/05 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN General Description Features The MAX8808X/MAX8808Y/MAX8808Z intelligent, Stand-Alone Linear 1-Cell Li+ Battery Charger stand-alone constant-current/constant-voltage (CCCV), No External FET, Reverse Blocking Diode, or thermally regulated linear chargers are designed for Current-Sense Resistor Required charging a single-cell lithium-ion (Li+) battery. The Programmable Fast-Charge Current (1A max) MAX8808X/MAX8808Y/MAX8808Z integrate the cur- rent-sense circuit, MOS pass element, and thermal-reg- Proprietary Die Temperature Regulation Control ulation circuitry, and eliminate the reverse-blocking (+115C) Schottky diode to create the simplest and smallest +4.25V to +15V Input Voltage Range with Input charging solution for handheld equipment. OVP Above +7V The MAX8808X functions as a stand-alone charger to Charge-Current Monitor for Fuel Gauging control the charging sequence from the prequalification state through fast-charge, top-off charge, and full- Low Dropout Voltage300mV at 500mA charge indication. The MAX8808Y and MAX8808Z elimi- Input Power-Source Detection Output (ACOK) and nate the prequalification state to allow startup into a load Charge-Enable Input (EN or EN) without a battery. Proprietary thermal-regulation circuitry limits the die temperature when fast-charging or while Soft-Start Limits Inrush Current exposed to high ambient temperatures, allowing maxi- Charge-Status Output (CHG) for LED or mum charging current without damaging the IC. Microprocessor (P) Interface The MAX8808X/MAX8808Y/MAX8808Z achieve high Tiny 2mm x 2mm 8-Pin TDFN Package, 0.8mm flexibility by providing an adjustable fast-charge current (max) Height with an external resistor. Other features include a bat- tery charging-status indicator (CHG), an active-low con- Ordering Information trol input (EN) for the MAX8808X and MAX8808Z (active-high control input for the MAX8808Y), and an TOP PART PIN-PACKAGE active-low input power-source detection output (ACOK). MARK The MAX8808X/MAX8808Y/MAX8808Z accept a MAX8808XETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAC +4.25V to +15V supply, but disable charging when the MAX8808YETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAB input voltage exceeds +7V to protect against unquali- MAX8808ZETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAA fied or faulty AC adapters. The MAX8808X/MAX8808Y/ MAX8808Z operate over the extended temperature All devices specified over the -40C to +85C operating range. range (-40C to +85C) and are available in a compact +Denotes lead-free package. 8-pin thermally enhanced 2mm x 2mm TDFN package *EP = Exposed paddle. with 0.8mm (max) height. Applications Typical Operating Circuit Cellular and Cordless Phones Smartphones and PDAs 4.25V TO 15V IN BATT Digital Still Cameras and MP3 Players 4.2V Li+ MAX8808X USB Appliances MAX8808Y MAX8808Z CHG Charging Cradles and Docks OFF Bluetooth Equipment EN* ACOK ON ISET VL GND Pin Configuration appears at end of data sheet. *MAX8808Y USES ACTIVE-HIGH LOGIC FOR EN. Bluetooth is a registered trademark of Bluetooth SIG. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN ABSOLUTE MAXIMUM RATINGS IN to GND...............................................................-0.3V to +16V BATT Short-Circuit Duration.......................................Continuous VL, BATT, EN, ACOK, CHG to GND.........................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C VL, ISET to GND.......................................................-0.3V to +4V Junction Temperature......................................................+150C VL to IN................................................................-16.3V to +0.3V Storage Temperature Range .............................-65C to +150C IN to BATT Continuous Current.............................................1.5A Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 8-Pin 2mm x 2mm TDFN (derate 15.4mW/C above +70C).............................................................1234mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 5V, V = 4.0V, R = R = 100k to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the IN BATT ACOK CHG MAX8808Y), R = 2.8k to GND, C = 0.47F, C = 1F, T = -40C to +85C, unless otherwise noted. Typical values are at ISET VL BATT A T = +25C.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range 015V Input Operating Range 4.25 6.50 V V rising 15 40 60 IN ACOK Threshold V - V , 10mV hysteresis (typ) mV IN BATT V falling 10 30 45 IN Overvoltage-Lockout Trip Point V rising, 100mV hysteresis (typ) 6.5 7 7.5 V IN Charging (I - I ) 0.8 2 IN BATT IN Input Current Disabled 0.23 0.50 mA OFF state (V = V = 4.0V) 0.065 IN BATT VL Output Voltage I = 100A 3.0 V VL VL Load Regulation I = 100A to 2mA -5 -30 mV VL VL Undervoltage-Lockout Trip V rising, 100mV hysteresis (typ) 2.74 V VL Point V = 0 to 4V 1 10 IN BATT Input Current A Disabled 1 10 Maximum RMS Charge Current 1 A RMS Battery Regulation Voltage I = 1mA 4.162 4.200 4.238 V BATT Minimum BATT Bypass 2.2 F/A Capacitance Fast-Charge Current Loop V = 3.5V T = 0C to +85C 418 465 512 mA BATT A System Accuracy 2 MAX8808X/MAX8808Y/MAX8808Z