LTC3533 Datasheet | Linear Technology

Features n Regulated Output with Input Voltages Above, Below or Equal to the Output n 1.8V to 5.5V (Input) and 5.25V (Output) Voltage Range n 0.8A Continuous Output Current: VIN > 1.8V n 2A Continuous Output Current: VIN > 3V n Single Inductor n Synchronous Rectification: Up to 96% Efficiency n Programmable Burst Mode® Operation: IQ = 40µA n Output Disconnect in Shutdown n Programmable Frequency from 300k Hz to 2MHz n <1µA Shutdown Current n Small Thermally Enhanced 14-Lead (3mm × 4mm × 0.75mm) DFN package Applications n GSM Modems n Handheld Instruments n Digital Cameras n Smart Phones n Media Players n Miniature Hard Disk Drive Power LTC3533 2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter Description The LTC®3533 is a wide VIN range, highly efficient, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single cell lithium-ion/polymer or multi-cell alkaline/Ni MH applications where the output voltage is within the input voltage range. The LTC3533 Features programmable Burst Mode operation, extended VIN and VOUT ranges down to 1.8V, and increased output current. Switching frequencies up to 2MHz are programmed with an external resistor. The Burst Mode threshold is programmed with a single resistor from the BURST pin to GND. Other Features include 1µA shutdown current, short circuit protection, programmable soft-start, current limit and thermal shutdown. The LTC3533 is housed in the thermally enhanced 14-lead (3mm × 4mm × 0.75mm) DFN package. L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 2.2μH VIN 2.4V TO 4.2V OFF ON 10μF SW1 SW2 PVIN VIN PVOUT...