LTC1265-3.3

LTC1265/LTC1265-3.3/LTC1265-5 1.2A, High Efficiency Step-Down DC/DC Converter FEATURES s s DESCRIPTIO s s s s s s s s High Efficiency: Up to 95% Current Mode Operation for Excellent Line and Load Transient Response Internal 0.3Ω Power Switch (VIN = 10V) Short-Circuit Protection Low Dropout Operation: 100% Duty Cycle Low-Battery Detector Low 160µA Standby Current at Light Loads Active-High Micropower Shutdown: IQ < 15µA Peak Inductor Current Independent of Inductor Value Available in 14-pin SO Package The LTC®1265 is a monolithic step-down current mode DC/DC converter featuring Burst Mode TM operation at low output current. The LTC1265 incorporates a 0.3Ω switch (VIN =10V) allowing up to 1.2A of output current. Under no load condition, the converter draws only 160µA. In shutdown it typically draws a mere 5µA making this converter ideal for current sensitive applications. In dropout the internal P-channel MOSFET switch is turned on continuously maximizing the life of the battery source. The LTC1265 incorporates automatic power saving Burst Mode operation to reduce gate charge losses when the load currents drop below the level required for continuous operation. The inductor current is user-programmable via an external current sense resistor. Operation up to 700kHz permits the use of small surface mount inductors and capacitors. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation. U APPLICATIO S...