The LTC®3526L/LTC3526LB are synchronous, fixed frequency step-up DC/DC converters with output disconnect. Synchronous rectifi cation enables high effi ciency in the low profi le 2mm × 2mm DFN package. Battery life in single AA/AAA powered products is extended further with a 680mV 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 profi le inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3526L features Burst Mode operation at light load conditions allowing it to maintain high effi ciency over a wide range of load. The LTC3526LB features fi xed frequency operation for low noise applications. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown.
The LTC3526L/LTC3526LB are housed in a 2mm × 2mm × 0.75mm DFN package.

*Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
*VIN Start-Up Voltage: 680mV
*1.5V to 5.25V VOUT Range
*Up to 94% Effi ciency
*Output Disconnect
*1MHz Fixed Frequency Operation
*VIN > VOUT Operation
*Integrated Soft-Start
*Current Mode Control with Internal Compensation
*Burst Mode® Operation with 9μA IQ (LTC3526L)
*Low Noise PWM Operation (LT3526LB)
*Internal Synchronous Rectifi er
*Logic Controlled Shutdown (IQ < 1μA)
*Anti-Ring Control
*Low Profi le (2mm × 2mm × 0.75mm) DFN-6 Package

*Medical Instruments
*Noise Canceling Headphones
*Wireless Mice
*Bluetooth Headsets


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