MAX8606 19-3795 Rev 1 12/08 USB/AC Adapter, Li+ Linear Battery Charger with Integrated 50m Battery Switch in TDFN General Description Features The MAX8606 complete 1-cell Li+ battery charge-man- Small 3mm x 3mm Thermally Enhanced TDFN agement IC operates from either a USB port or AC Package (0.8mm max height) adapter. It integrates a battery disconnect switch, cur- USB-Compliant Suspend Mode (20A) rent-sense circuit, PMOS pass element, and thermal- Selectable 100mA, 500mA, and Up to 1A Input regulation circuitry, while eliminating the external reverse-blocking Schottky diode, to create a simple Current Limits and small charging solution. The charging sequence USB or AC Adapter Input initiates from power-OK indication, through prequalifi- +6V to +14V Input Overvoltage Protection cation, fast-charge, top-off charge, and finally charg- ing-complete indication for single-cell Li+ batteries. Input UVLO Below +4V Rising (3.5V Falling) Charging is controlled using constant current, constant Automatic Current Sharing Between Battery voltage, or constant die-temperature (CCCVCT ) regu- J Charging and System lation for safe operation in handhelds. Die Temperature Regulation (+100C) Two logic inputs (EN1 and EN2) select suspend mode, 100mA, 500mA, or 1A input current limits to suit USB Prequal, Fast-Charge, and Top-Off Timers requirements. Proprietary thermal-regulation circuitry Low Dropout Voltage, 250mV at 0.5A limits the die temperature to +100C to prevent exces- NTC Thermistor Input sive heat on the system PC board. Additional safety features include an NTC thermistor input (THM) and Charge Status and Input-Supply Detection Flags internal timers to protect the battery. A 3.5V to 4.2V SYS output, in conjunction with the low-R battery DSON Ordering Information switch, powers the system even when the battery is deeply discharged or not installed. The IC also offers a TOP +3.3V/500A output (VL), a charging status flag (CHG), PART TEMP RANGE PIN-PACKAGE MARK and an input-supply detection flag (POK). The MAX8606 operates from a +4.25V to +5.5V supply and 14 TDFN 3mm x MAX8606ETD+ -40C to +85C AAF includes undervoltage lockout below +3.4V and over- 3mm (T1433-1) voltage protection up to +14V. +Denotes lead-free/RoHS-compliant package. Applications Cellular Phones, Smartphones, PDAs Typical Operating Circuit Digital Cameras, MP3 Players USB Appliances, Charging Cradles and Docks STATUS INDICATORS USB/AC-ADAPTER Pin Configuration OVP UP TO 14V CHG IN POK 3.5V TO 4.2V TOP VIEW SYS 0.1F GND 14 13 12 11 10 9 8 VL CONTROL INPUT EN1 BAT CURRENT MAX8606 EN2 SELECTION THM TMR P Li+ SETI STAND-ALONE 1 2 3 4 5 6 7 MAX8606 TDFN 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 + BAT SYS BAT SYS IN SETI VL GND THM EN1 CHG EN2 POK TMRUSB/AC Adapter, Li+ Linear Battery Charger with Integrated 50m Battery Switch in TDFN ABSOLUTE MAXIMUM RATINGS IN to GND.............................................................. -0.3V to +16V Continuous Power Dissipation (T = +70C) A BAT, SYS, EN1, EN2, POK, CHG, TMR to GND.......-0.3V to +6V 14-Pin 3mm x 3mm TDFN (derate 24.4mW/C VL, SETI, THM to GND .............................................-0.3V to +4V above +70C)..........................................................1951.2mW SYS to BAT ...............................................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C VL to IN...................................................................-16V to +0.3V Junction Temperature Range ............................-40C to +150C IN to BAT Current ...........................................................1.0A Storage Temperature Range .............................-65C to +150C RMS IN to SYS Current ...........................................................1.0A Lead Temperature (soldering, 10s) .................................+300C RMS BAT to SYS Current ........................................................1.0A RMS BAT Short-Circuit Duration.........................................Continuous 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 = 5.0V, V = 3.3V, EN1 = EN2 = GND, R = 23.58k, C = 0.1F, C = 4.7F, T = -40C to +85C, unless otherwise IN BAT SETI VL SYS A noted. Typical values are at T = +25C.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS IN IN Voltage Range 014V IN Operating Voltage Range (Note 2) 4.25 5.50 V IN Undervoltage Threshold V rising, 500mV hysteresis (typ) 3.9 4.0 4.1 V IN IN Overvoltage Threshold V rising, 100mV hysteresis (typ) 5.6 5.8 6.0 V IN Charging, I = I = 0mA 1.2 3.0 mA BAT SYS IN Supply Current Suspend, EN1 = EN2 = high, I = 0mA 20 40 A VL T = +25C 0.1 10 A IN to BAT Switch Leakage V = 14V, BAT = GND A IN T = +85C 0.5 A SYS SYS Regulated Voltage I = 0mA, V = 3.3V 3.4 3.5 3.6 V SYS BAT EN1 = low, EN2 = low 90 95 100 SYS Current Limit V = 3.3V mA EN1 = low, EN2 = high 450 475 500 SYS EN1 = high, EN2 = low 675 712 750 SYS Dropout Voltage (V - V )I = 400mA, V = 3.3V, EN1 = low, EN2 = high 350 700 mV IN BAT SYS SYS SYS Load Regulation I = 1mA to 675mA, EN1 = high, EN2 = low 10 mV SYS BAT T = +25C 4.18 4.20 4.22 A BAT Regulation Voltage I = 0mA V BAT T = -40C to +85C 4.16 4.20 4.24 A Maximum Charging Current 1 A I = 0mA 87 95 100 EN1 = low, SYS EN2 = low I = 50mA 45 SYS I = 0mA 450 475 500 EN1 = low, SYS BAT Charging Current mA EN2 = high I = 250mA 225 SYS I = 0mA 675 712 750 SYS EN1 = high, EN2 = low I = 375mA 337 SYS 2 MAX8606