POWER LOSS (mW) LTC3526L/LTC3526LB 550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm 2mm DFN Fe Aserut Dnoitpircse n Delivers 3.3V at 100mA from a Single Alkaline/ The LTC 3526L/LTC3526LB are synchronous, fixed NiMH Cell or 3.3V at 200mA from Two Cells frequency step-up DC/DC converters with output discon- n V Start-Up Voltage: 680mV nect. Synchronous rectification enables high efficiency in IN n 1.5V to 5.25V V Range the low profile 2mm 2mm DFN package. Battery life in OUT n Up to 94% Efficiency single AA/AAA powered products is extended further with n Output Disconnect a 680mV start-up voltage and operation down to 500mV n 1MHz Fixed Frequency Operation oncestarted. n V > V Operation IN OUT A switching frequency of 1MHz minimizes solution foot- n Integrated Soft-Start print by allowing the use of tiny, low profile inductors n CurrentMode Control withInternal Compensation and ceramic capacitors. The current mode PWM design n BurstMode Operation with9A I (LTC3526L) Q is internally compensated, reducing external parts count. n LowNoise PWM Operation (LT3526LB) The LTC3526L features Burst Mode operation at light load n Internal SynchronousRectifier conditions allowing it to maintain high efficiency over a n Logic Controlled Shutdown (I < 1A) Q wide range of load. The LTC3526LB features fixed frequency n Anti-RingControl operation for low noise applications. Anti-ring circuitry n Low Profile (2mm 2mm 0.75mm) reduces EMI by damping the inductor in discontinuous DFN-6 Package mode. Additional features include a low shutdown current of under 1A andthermal shutdown. Acilpp Asnoit The LTC3526L/LTC3526LB are housed in a 2mm 2mm n MedicalInstruments 0.75mmDFN package. n NoiseCanceling Headphones L, LT, LTC, LTM,Linear Technology, the Linear logo and BurstMode are registered trademarks and ThinSOT isa trademark of Linear Technology Corporation. All othertrademarks arethe n Wireless Mice propertyof theirrespective owners. n BluetoothHeadsets t cipy A l Acilpp Anoit Efficiency and Power Loss vs Load Current 100 1000 V = 2.4V IN 4.7H 90 EFFICIENCY 80 100 SW 70 V OUT V IN V V 3.3V IN OUT 60 10 1.6V TO 3.2V 200mA 4.7F LTC3526L 1.78M 50 POWER LOSS 4.7F OFF ON SHDN FB 40 1 GND 1M 30 3526l TA01a 20 0.1 10 0 0.01 0.01 0.1 1 10 100 1000 LOAD CURRENT (mA) 3526l TA01b 3526lfc EFFICIENCY (%)LTC3526L/LTC3526LB A etulosbM Aix Mu M Ar sgnit p ni c no Fi rug Anoit (Note 1) TOP VIEW V V oltage ................................................... 0.3Vt o 6V IN SW Voltage SW 1 6 V OUT DC ............................................................ 0.3V to 6V GND 2 7 5 FB Pulsed< 100ns ......................................... 0.3Vt o7 V V 3 4 SHDN IN SHDN, FB Voltage ........................................ 0.3Vt o 6V V ............................................................. 0.3Vt o6 V DC PACKAGE OUT 6-LEAD (2mm s 2mm) PLASTIC DFN OperatingT emperatureR ange T = 125C, = 102C/W(NOTE 6) JMAX JA (Notes2 ,5 ) ..............................................40C to8 5C EXPOSED PAD (PIN 7)IS GND, MUST BE SOLDEREDTO PC BOARD StorageT emperature Range .................. 65C to1 50C o r D re i n Fro MAnoit LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3526LEDC PBF LTC3526LEDC TRPBF LCSS 40Cto 85C 6-Lead (2mm 2mm)Plastic DFN LTC3526LBEDC PBF LTC3526LBEDC TRPBF LCST 40C to 85C 6-Lead (2mm 2mm)Plastic DFN Consult LTC Marketing forparts specified with wider operating temperaturera nges. Consult LTC Marketing for information on non-standard lead based finish parts. Formore information on lead free part marking, go to: