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Linear Technology Corp.'s LTC3564 is a high efficiency, 2.25MHz, synchronous buck regulator that can deliver up to 1.25A of continuous output current from a 2x3mm DFN or ThinSOT package. Using a constant frequency current mode architecture, the LTC3564 operates from an input voltage range of 2.5V to 5.5V, making it ideal for Li-ion battery inputs as well as 3.3V or 5V inputs for point-of-load applications.



The device can generate output voltages as low as 0.6V, enabling it to power the latest generation of low voltage DSPs and microcontrollers. It utilizes a constant 2.25MHz switching frequency, enabling the use of tiny, low cost ceramic capacitors and inductors less than a 1mm in height, providing a very compact solution footprint.



The LTC3564 uses internal switches with an RDS(ON) of only 0.15¦¸ (N-Channel and P-Channel) to deliver efficiencies as high as 96 percent. It also has low dropout 100 percent duty cycle operation to extend battery run-time. The LTC3564 utilizes automatic Burst Mode operation to achieve only 20µA of no load quiescent current and less than 1µA in shutdown. Other features include ¡Ó2 percent output voltage accuracy, current mode operation and over-temperature protection.



Click here for more information on Linear Technology's LTC3564 Step-down Regulator



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