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Complete 3-Rail Power Supply in a 4mm × 4mm QFN Package
The LTC3520’s buck-boost converter utilizes an advanced switching algorithm to precisely regulate the output voltage with input voltages that are above, below, or even equal to the output voltage.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1116,P38853,D26003 -
LTC3531/ LTC3531-3.3/LTC3531-3 200mA Buck-Boost Synchronous DC/DC Converters
The LTC®3531/LTC3531-3.3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes, making the product ideal for single cell Li-Ion and multicell alkaline or nickel applications. The converters operate in Burst Mode, minimizing solution footprint and component count as well as providing high conversion efficiency over a wide range of load currents.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1116,P15979,D11037 -
LTC3444 Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications
The LTC®3444 is a highly efficient, fixed frequency, buckboost DC/DC converter, which operates from input voltages above, below, and 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 a single Lithium-Ion or multi-cell applications where the output voltage can vary over a wide range.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1116,P15694,D10839 -
LTC3530 Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
The LTC®3530 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 lithium-ion, two-cell alkaline or NiMH applications where the output voltage is within the battery voltage range.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1116,P30252,D17498 -
Wide Input Voltage Range Buck-Boost Converter Simplifies Design of Variable Input Supplies
Many of today’s portable electronic devices require the ability to operate from a variety of power sources including USB, wall adapters, and alkaline and lithium batteries. Designing a power conversion solution that is compatible with this wide array of power sources can be daunting.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,C1116,P30252,D24932
