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LTC3532EDD-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC3532EDD-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC3532 1 3532fc Micropower Synchronous Buck-Boost DC/DC Converter The LTC®3532 is a high efficiency, 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 lithium-ion, multicell alkaline or NiMH ap- plications where the output voltage is within the battery voltage range. The device includes two 0.36Ω N-channel MOSFET switches and two 0.42Ω P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor. Quiescent current is only 35μA in Burst Mode operation, maximizing battery life in portable applica- tions. Automatic Burst Mode operation allows the user to program the load current for Burst Mode operation or to control it manually. Other features include a 1μA shutdown, soft-start control, thermal shutdown, and peak current limit. The LTC3532 is available in a low profile (0.75mm) 10-lead (3mm × 3mm) DFN and 10-lead MSOP packages. ■ Miniature Hard Disk Drive Power Supply ■ MP3 Players ■ Handheld Instruments ■ Digital Cameras ■ Handheld Terminals ■ Single Inductor ■ Regulated Output with Input Voltages Above, Below or Equal to the Output ■ Wide VIN Range: 2.4V to 5.5V ■ VOUT Range: 2.4V to 5.25V ■ Up to 500mA Peak Output Current ■ Synchronous Rectification: Up to 95% Efficiency ■ Manual or Programmable Automatic Burst Mode® Operation ■ Output Disconnect in Shutdown ■ Programmable Oscillator: 300kHz to 2MHz ■ Pin Compatible with LTC3440 ■ Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN and 10-Lead MSOP Packages Miniature Hard Disk Drive Power Supply APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATIO , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. SW1 VIN SHDN/SS BURST RT SW2 VOUT FB VC GND LTC3532 3532 TA01 43.2k 0.01μF 200k 4.7μF VIN Li-Ion 2.5V TO 4.2V 4.7μH VOUT 3.3V 100mA TO 500mA (PEAK) 10μF 33pF 1k 340k 12.1k 220pF 200k VOUT 200mV/DIV ILOAD 100mA/DIV 100μs/DIV VIN = 3V VOUT = 3.3V ILOAD = 50mA TO 300mA 3532 TA01b |
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