Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3422
Edited by the Electronicstalk Editorial Team on 22 February 2006
Synchronous boost convertor saves
batteries
The LTC3422 is a 3MHz, current mode, synchronous boost DC/DC convertor with true output disconnect, inrush current limiting and integrated soft-start.
Linear Technology has released the LTC3422, a 3MHz, current mode, synchronous boost DC/DC convertor with true output disconnect, inrush current limiting and integrated soft-start Its internal switches provide a 1.5A current limit (minimum) and deliver output voltages as high as 5.25V from an input voltage range of 0.5 to 4.5V, making it ideal for Li-ion and single/multicell alkaline/NICd/NiMH applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The LTC3422 delivers up to 700mA of continuous output current (at 5V) from a single cell Li-ion input.
Synchronous rectification enables efficiencies of up to 96%, and burst mode operation lowers quiescent current to only 25uA, providing maximum battery run-time in handheld applications.
The combination of a 3 x 3mm DFN package and a constant switching frequency of up to 3MHz minimises both inductor and capacitor sizes, providing a tiny solution footprint required in handheld applications.
The LTC3422 uses internal switches with an on-resistance of only 0.20ohm (N-channel) and 0.24ohm (P-channel) to deliver efficiencies as high as 96%.
The true output disconnect feature allows the output to be completely discharged in shutdown.
It also limits the inrush of current during startup, minimising surge currents seen by the input supply.
Additional features include antiringing control, short-circuit protection, programmable soft start and thermal protection.
The LTC3422 is ideal for boost applications requiring up to 700mA of output current, and where a small solution size and maximum battery run-time are essential.
LTC3422EDD is available from stock in a 10-lead DFN package, with 1000-piece pricing starting at $2.95 each. Request a free brochure from Linear Technology Corp ...
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