MAX1507 19-2899 Rev 2 8/05 Linear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 3mm x 3mm Thin DFN General Description Features The MAX1507 is an intelligent, stand-alone constant-cur- Stand-Alone Linear 1-Cell Li+ Battery Charger rent, constant-voltage (CCCV), thermally regulated linear No External FET, Reverse-Blocking Diode, or charger for a single-cell lithium-ion (Li+) battery. The Current-Sense Resistor Required MAX1507 integrates the current-sense circuit, MOS pass element, and thermal-regulation circuitry, and also elimi- Programmable Fast-Charge Current (0.8A max) nates the reverse-blocking Schottky diode to create the Proprietary Programmable Die-Temperature simplest and smallest charging solution for hand-held equipment. Regulation Control (+90C, +100C, and +130C) The MAX1507 functions as a stand-alone charger to +4.25V to +13V Input Voltage Range with Input control the charging sequence from the prequalification Overvoltage Protection (OVP) Above +7V state through fast-charge, top-off charge, and full- Charge-Current Monitor for Fuel Gauging charge indication. Low Dropout Voltage130mV at 0.425A Proprietary thermal-regulation circuitry limits the die temperature when fast charging or while exposed to Input Power-Source Detection Output (VL) and high ambient temperatures, allowing maximum charg- Charge-Enable Input (EN) ing current without damaging the IC. Soft-Start Limits Inrush Current The MAX1507 achieves high flexibility by providing an adjustable fast-charge current and thermal regulation Charge Status Output (CHG) for LED or setpoints. Other features include the charging status Microprocessor Interface (CHG) of the battery and an active-low control input (EN). Small 3mm x 3mm 8-Pin Thin DFN Package, The MAX1507 accepts a +4.25V to +13V supply, but dis- 0.8mm High ables charging when the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The MAX1507 operates over the extended temperature Ordering Information range (-40C to +85C) and is available in a compact 8-pin thermally enhanced 3mm x 3mm Thin DFN pack- TOP PART TEMP RANGE PIN-PACKAGE MARK age with 0.8mm height. Applications MAX1507ETA-T -40C to +85C 8 Thin DFN-EP* AGW MAX1507ETA+T -40C to +85C 8 Thin DFN-EP* AGW Cellular and Cordless Phones + Denotes lead-free package. PDAs *EP = Exposed paddle. Digital Cameras and MP3 Players USB Appliances Typical Operating Circuit Charging Cradles and Docks Bluetooth Equipment INPUT 4.25V TO 13V Pin Configuration IN BATT Li+ TOP VIEW 1F 1F 4.2V 8 76 5 MAX1507 CHG ISET MAX1507 OFF EN TEMP 2.80k + ON 2 3 VL GND 1 4 0.47F 3mm x 3mm THIN DFN Bluetooth is a trademark of Ericsson. 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 AVAILABLE VL CHG IN BATT GND TEMP ISET ENLinear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 3mm x 3mm Thin DFN ABSOLUTE MAXIMUM RATINGS Short-Circuit Duration.................................................Continuous IN, CHG to GND.....................................................-0.3V to +14V Operating Temperature Range ...........................-40C to +85C VL, BATT, ISET, EN, TEMP to GND..........................-0.3V to +6V VL to IN...................................................................-14V to +0.3V Junction Temperature......................................................+150C Storage Temperature Range .............................-65C to +150C IN to BATT Continuous Current.............................................0.9A Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 8-Pin TDFN (derate 24.4mW/C above+70C) ..........1951mW 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, TEMP = EN = CHG = unconnected, R = 2.8k to GND, C = 0.47F, BATT bypassed to GND with 1F, IN BATT ISET VL T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) A A PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range 013V Input Operating Range 4.25 6.50 V V - V , V rising 20 40 60 IN BATT IN ACOK Trip Point, IN mV V - V , V falling 15 30 45 IN BATT IN V rising 6.5 7 7.5 IN Overvoltage Lockout Trip Point V V hysteresis 0.11 IN Charging (I - I)12 IN BATT IN Input Current Disabled, EN = VL 0.8 1.5 mA OFF state (V = V = 4.0V) 0.065 IN BATT VL Output Voltage I = 100A 3.3 V VL VL Load Regulation I = 100A to 2mA -71 -200 mV VL VL Temperature Coefficient I = 100A -2 mV/C VL V rising 2.95 IN VL Undervoltage Lockout Trip Point V Hysteresis 0.17 V = 0 to 4V 3 10 IN BATT Input Current A EN = VL 4 10 Maximum RMS Charge Current 0.8 A T = 0C to +85C 4.162 4.2 4.238 A Battery Regulation Voltage I = 0 V BATT T = -40C to +85C 4.150 4.2 4.250 A BATT Removal Detection Threshold V rising 4.4 4.67 4.9 V BATT 2 MAX1507