LTC3526 Datasheet | Linear Technology

NOT REMENDED FOR NEW DESIGNS Contact Linear Technology for Potential Replacement LTC3526/LTC3526B 500m A 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN Features n Delivers 3.3V at 100m A from a Single Alkaline/ Ni MH Cell or 3.3V at 200m A from Two Cells n VIN Start-Up Voltage: 850m V 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 pensation 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 Applications n Medical Instruments n Flash-Based MP3 Players n Noise Canceling Headphones n Wireless Mice n Bluetooth Headsets Description The LTC®3526/LTC3526B are synchronous, fixed frequency step-up DC/DC converters with output disconnect. Synchronous 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 850m V start-up voltage and operation down to 500m V once started. A switching frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally pensated, reducing external parts count. 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 discontinuous 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 remend the LTC3526L/LTC3526LB. L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and...