ANALOG DEVICES LTC3240EDC-3.3#TRMPBF

LTC3240-3.3 is a step-up/step-down charge pump DC/DC converter. With input voltages greater than the regulated output voltage, the device operates as a low dropout regulator. Once the input voltage drops within 100mV of the regulated output voltage, the part automatically switches to step-up mode. In step-up mode the device operates as a constant frequency (1.2MHz) doubling charge pump. Built-in soft-start circuitry prevents excessive inrush current during start-up. Thermal shutdown and current-limit circuitry allow the parts to survive a continuous short-circuit from VOUT to GND. It require only three tiny external ceramic capacitors for an ultra small application footprint. It is widely used in application such as 2AA to 2.5V, 2-3 AA/Li-Ion to 3.3V, low power supplies for cameras, I/O supplies, audio, PC cards, Misc. logic, etc., in a wide variety of handheld products.