LTC3526

NOT RECOMMENDED FOR NEW DESIGNS Contact Linear Technology for Potential Replacement LTC3526/LTC3526B 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN Features 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 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 850mV start-up voltage and operation down to 500mV 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 compensated, reducing external parts count. The LTC3526 features automatic Burst Mode operation at l...