LTC3532EDD#TRPBF Power Path Management IC Switching Voltage Regulators Micropower Synchronous Buck-Boost DC/DC Converter
microchip battery management
,battery charge management ic
LTC3532EDD#TRPBF Power Path Management IC Switching Voltage Regulators Micropower Synchronous Buck-Boost DC/DC Converter
FEATURES
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Single Inductor
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Regulated Output with Input Voltages Above, Below or Equal to the Output
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Wide VIN Range: 2.4V to 5.5V
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VOUT Range: 2.4V to 5.25V
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Up to 500mA Peak Output Current
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Synchronous Rectification: Up to 95% Efficiency
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Manual or Programmable Automatic Burst Mode® Operation
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Output Disconnect in Shutdown
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Programmable Oscillator: 300kHz to 2MHz
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Pin Compatible with LTC3440
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Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN and 10-Lead MSOP Packages
APPLICATIO S
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Miniature Hard Disk Drive Power Supply
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MP3 Players
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Handheld Instruments
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Digital Cameras
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Handheld Terminals
DESCRIPTIO
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.
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