Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3527EUD and LTC3527EUD-1
Edited by the Electronicstalk Editorial
Team on 31 March 2008
Boost convertors have safety in mind
Devices have the ability to regulate output voltage even when the input voltage exceeds the output, further extending battery runtime.
New from Linear Technology, the LTC3527 and -1 are dual-output 2.2MHz current-mode synchronous boost DC/DC convertors with integrated output disconnect Their internal 800 and 400mA switches can deliver output voltages as high as 5.25V from an input voltage of 0.70V (0.5V when running), up to 5V, making them ideal for Li-ion/polymer or single/multiple-cell alkaline/NiMH applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The LTC3527/-1 can deliver up to 200 and 100mA of continuous output current (at 3.3V) from a single alkaline cell or 400 and 200mA from dual cells.
Synchronous rectification enables efficiencies of up to 94%, and Burst Mode operation lowers quiescent current to only 12uA, providing extended battery runtime in handheld applications.
Selectable 1.2 or 2.2MHz operation provides a choice between the highest efficiency or smallest solution footprint.
The combination of a 3 x 3mm QFN-16 package and high switching frequency minimise both inductor and capacitor sizes, providing a tiny solution footprint required in handheld applications.
The LTC3527 and -1 have the ability to regulate output voltage even when the input voltage exceeds the output, further extending battery runtime.
The output disconnect feature allows the outputs to be completely open in shutdown, and each device actively discharges both outputs when entering shutdown.
Additionally, inrush current limiting minimises input surge currents during startup.
Additional features include antiringing control, short-circuit protection and thermal protection.
The LTC3527 and -1 are ideal for boost applications requiring dual channels with up to 400mA of output current and where a small solution size and high battery run-time are key factors.
LTC3527EUD and LTC3527EUD-1 are both available from stock in 16-lead QFN packages.
1000-piece pricing starts at US $2.95 each. Request a free brochure from Linear Technology Corp ...
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