MAX8600A 19-3205 Rev 1 1/09 Single-Input 1-Cell Li+ Charger with OVP Protection and Programmable Charge Timer General Description Features The MAX8600A single-input linear battery charger safe- Low Dropout -0.188V at 0.75A ly charges single-cell Li+ batteries. Charging is opti- Up to 1A Programmable Fast-Charge mized for Li+ cells using a control algorithm that includes low-battery precharging, voltage and current- 5% Charge-Current Accuracy limited fast-charging, and top-off charging, while con- Logic-Low Enable Input tinuously monitoring the battery for overvoltage, over/under temperature, and charging time. Charger 14V Input Overvoltage Protection timeout protection is programmable, and the status is Programmable On-Chip Charge Timer indicated by three open-drain outputs. The MAX8600A linear charger optimizes charging time Battery Thermistor Input by adjusting the charge rate to accommodate the ther- Three Charger-Status Outputs mal characteristics of a given application. There is no need to reduce the maximum charge current to accom- Thermally Optimized Charge Rate modate worst-case charger power dissipation. 14-Pin, 3mm x 3mm TDFN Package The MAX8600A is a variation of the MAX8600 with improved dropout and other spec changes. See Maxims website for an outline of MAX8600/MAX8600A Ordering Information differences. TOP The MAX8600A is available in a 3mm x 3mm power- PART TEMP RANGE PIN-PACKAGE MARK enhanced TDFN package. 14 TDFN-EP* Applications MAX8600AETD+ -40C to +85C (3mm x 3mm) AEF (T1433-2) Cell Phones Portable Media Players *EP = Exposed pad. Digital Cameras MP3 Players +Denotes a lead(Pb)-free/RoHS-compliant package. PDAs Wireless Appliances GPS Pin Configuration Typical Operating Circuit TOP VIEW SAFE DC + LOGIC SUPPLY BAT 1 14 FLT DC INPUT LED DC POK 4.1V TO 5.9V SETI 2 13 DC MAX8600A THM 3 12 DC OFF EN ON CHG GND 4 11 CHG CT MAX8600A FLT CT 5 10 POK BAT 6 9 N.C. DC + SETI Li+ BAT 7 8 EN THM GND TDFN Maxim Integrated Products 1 For information on other Maxim products, visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLESingle-Input 1-Cell Li+ Charger with OVP Protection and Programmable Charge Timer ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40C to +85C POK to GND.................................................-0.3V to (DC + 0.3V) Junction Temperature Range ............................-40C to +150C DC to GND .............................................................-0.3V to +16V BAT, CT, CHG, EN, FLT, SETI, Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C THM to GND......................................................-0.3V to +5.5V Continuous Power Dissipation (T = +70C) A 14-Pin TDFN 3mm x 3mm Multilayer PCB (derate 24.4mW/C above +70C)...................................................... 1951.2mW 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 = 3.6V, V = 0V, R = 2k, C = 0.068F, T = -40C to +85C, unless otherwise noted. Typical values are at DC BAT EN SETI CT A T = +25C.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS DC Input Voltage Range 014V Input Operating Range (Note 2) 4.1 6.0 V Input Undervoltage Threshold When POK goes low, DC rising, 500mV hysteresis 3.89 4.0 4.10 V Input Overvoltage Threshold When POK goes high, DC rising, 200mV hysteresis 6.2 6.5 6.8 V Input Supply Current I = 0mA, R = 10k 980 2000 A BAT THM Shutdown Input Current V = 5V 275 435 A EN Input to BAT On-Resistance V = 3.7V, V = 3.6V 0.25 0.5 DC BAT Input to BAT Dropout Voltage DC falling, 200mV hysteresis 5 75 150 mV BAT T = +25C 4.179 4.2 4.221 A BAT Regulation Voltage I = 0mA V BAT T = -40C to +85C 4.166 4.2 4.234 A BAT Restart Fast-Charge From BAT regulation voltage -180 -150 -120 mV Threshold R = 1.5k 950 1000 1050 SETI R = 2k 675 750 825 SETI DC Charging Current mA R = 5k 275 300 325 SETI R = 2k, V = 2.0V 67.5 75 82.5 SETI BAT Soft-Start Time Ramp time to fast-charge current 1.2 ms When charging current changes, BAT rising, 170mV BAT Prequal Threshold 2.30 2.50 2.54 V hysteresis BAT Leakage Current V = 0V, V = 4.2V 0.001 5A DC BAT CONTROL INPUTS AND OUTPUTS SETI R Resistance Range Guaranteed by charging current 1.5 5.0 k SETI 2 MAX8600A