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LTC3526BEDC Datasheet(PDF) 1 Page - Linear Technology |
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LTC3526BEDC Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC3526/LTC3526B 3526bfd Typical applicaTion applicaTions FeaTures DescripTion 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN TheLTC®3526/LTC3526Baresynchronous,fixedfrequency step-up DC/DC converters with output disconnect. Syn- chronous rectification enables high efficiency in the low profile 2mm × 2mm DFN package. Battery life in single AA/AAA powered products is extended further with an 850mV start-up voltage and operation down to 500mV once started. A switching frequency of 1MHz minimizes solution foot- print by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internallycompensated,reducingexternalpartscount.The LTC3526 features automatic Burst Mode operation at light load conditions, while the LTC3526B features continuous switching at light loads. Anti-ringing control circuitry also reduces EMI concerns by damping the inductor in discon- tinuous mode. Additional features include a low shutdown current of under 1µA and thermal shutdown. The LTC3526/LTC3526B are housed in a 2mm × 2mm × 0.75mm DFN package. For new designs, we recommend the LTC3526L/LTC3526LB. L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Medical Instruments n Flash-Based MP3 Players n Noise Canceling Headphones n Wireless Mice n Bluetooth Headsets n Delivers 3.3V at 100mA from a Single Alkaline/ NiMH Cell or 3.3V at 200mA from Two Cells n VIN Start-Up Voltage: 850mV n 1.6V to 5.25V VOUT Range n Up to 94% Efficiency n Output Disconnect n 1MHz Fixed Frequency Operation n VIN > VOUT Operation n Integrated Soft-Start n Current Mode Control with Internal Compensation n Automatic Burst Mode® Operation with 9µA Quiescent Current (LTC3526) n Low Noise PWM Operation (LTC3526B) n Internal Synchronous Rectifier n Logic Controlled Shutdown (IQ < 1µA) n Anti-Ringing Control n Low Profile (2mm × 2mm × 0.75mm) DFN Package SW VIN 1.78M 4.7µH 1M 1µF 4.7µF 3526 TA01a LTC3526 SHDN VOUT FB VIN 1.6V TO 3.2V VOUT 3.3V 200mA OFF ON GND LOAD CURRENT (mA) 0.01 40 50 60 70 80 0.1 1 10 100 1000 3526 TA01b 30 20 10 0 90 100 1 10 100 0.1 0.01 1000 EFFICIENCY POWER LOSS VIN = 2.4V LTC3526 Efficiency and Power Loss vs Load Current NOT RECOMMENDED FOR NEW DESIGNS Contact Linear Technology for Potential Replacement |
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