LTC1734ES6-4.2#TRMPBF Analog Devices

LTC1734 Lithium-Ion Linear Battery Charger in ThinSOT Fea T Descrip T n Low Profile (1mm) ThinSOT Package The LTC 1734 is a low cost, single cell, constant-current/ n No Blocking Diode Required constant-voltage Li-Ion battery charger controller. When n No Sense Resistor Required combined with a few external components, the TSOT-23 n 1% Accurate Preset Voltages: 4.1V or 4.2V package forms a very small, low cost charger for single n Charge Current Monitor Output cell lithium-ion batteries. for Charge Termination The LTC1734 is available in 4.1V and 4.2V versions with n Programmable Charge Current: 200mA to 700mA 1% accuracy. Constant current is programmed using a n Automatic Sleep Mode with Input Supply Removal single external resistor between the PROG pin and ground. n Manual Shutdown Manual shutdown is accomplished by floating the program n Negligible Battery Drain Current in Shutdown resistor while removing input power automatically puts n Undervoltage Lockout the LTC1734 into a sleep mode. Both the shutdown and n Self Protection for Overcurrent/Overtemperature sleep modes drain near zero current from the battery. Charge current can be monitored via the voltage on the a T PROG pin allowing a microcontroller or ADC to read the current and determine when to terminate the charge cycle. n Cellular Telephones The output driver is both current limited and thermally n Handheld Computers protected to prevent the LTC1734 from operating outside n Digital Cameras of safe limits. No external blocking diode is required. n Charging Docks and Cradles n Low Cost and Small Size Chargers The LTC1734 can also function as a general purpose current n Programmable Current Sources source or as a current source for charging nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property external termination. of their respective owners. Typical a T 300mA Li-Ion Battery Charger PROG Pin Indicates Charge Status 5V 3 1 V IN V BAT V I CC SENSE 5V 4V LTC1734 1F 2 6 FMMT549 GND DRIVE I = 300mA BAT 4 5 3V PROG BAT SINGLE + 10F Li-Ion CONSTANT CONSTANT R PROG BATTERY CURRENT VOLTAGE 5k 2V 1.5V V 1734 TA01 PROG 1V 0V CHARGING CHARGING BEGINS COMPLETE 1734 TA01b 1734fa 1 For more information www.linear.com/LTC1734 V (V) V (V) PROG BAT ion pplica ions pplica ion uresLTC1734 a Te Maxi Mu M r a T p in c F T (Note 1) Supply Voltage (V ) .................................0.3V to 9V CC Input Voltage (BAT, PROG) ........... 0.3V to (V + 0.3V) CC TOP VIEW Output Voltage (DRIVE) ............... 0.3V to (V + 0.3V) CC I 1 6 DRIVE SENSE Output Current (I ).................................... 900mA SENSE GND 2 5 BAT Short-Circuit Duration (DRIVE) ....................... Indefinite V 3 4 PROG CC Junction Temperature .......................................... 125C S6 PACKAGE 6-LEAD PLASTIC TSOT-23 Operating Ambient Temperature Range T = 125C, = 230C/W JMAX JA (Note 2) ...............................................40C to 85C Operating Junction Temperature (Note 2) ............. 100C Storage Temperature Range ..................65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1734ES6-4.1 PBF LTC1734ES6-4.1 TRPBF LTHD 6-Lead Plastic SOT-23 40C to 85C LTC1734ES6-4.2 PBF LTC1734ES6-4.2 TRPBF LTRG 6-Lead Plastic SOT-23 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: