LTC3526LBEDC#TRMPBF

LTC3526LB is a synchronous, fixed frequency step-up DC/DC converter with output disconnect. 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 profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. This features fixed 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. Typical applications are medical instruments, noise cancelling headphones, wireless mice, Bluetooth headsets.

• Delivers 3.3V at 100mA from a single alkaline/NiMH cell or 3.3V at 200mA from two cells
• Up to 94% efficiency, output disconnect
• 1MHz fixed frequency operation
• VIN <gt/> VOUT operation, integrated soft-start
• Current mode control with internal compensation, anti-ring control
• Internal synchronous rectifier, logic controlled shutdown (IQ <lt/> 1µA)
• Minimum start-up input voltage is 0.8V (ILOAD=1mA)
• Feedback pin input current is 50nA (VFB=1.30V)
• 6-lead plastic DFN package
• Temperature rating range from –40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party