Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3525-3.3 and LTC3525-5
Edited by the Electronicstalk Editorial
Team on 29 December 2005
Step-up convertors are made for battery
power
The LTC3525-3.3 and LTC3525-5 are 400mA synchronous step-up DC/DC convertors with true output disconnect and inrush current limiting in SC70 packages.
Linear Technology has announced the LTC3525-3.3 and LTC3525-5, 400mA synchronous step-up DC/DC convertors with true output disconnect and inrush current limiting in SC70 packages They operate from an input voltage range of 1 to 4.5V, making them ideal for single- and multiple-cell alkaline/NiCd/NiMH, as well as Li-ion applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The LTC3525-3.3 offers a fixed 3.3V output whereas the LTC3525-5 has a fixed 5V output.
The LTC3525-3.3 can deliver up to 140mA of continuous output current from dual AA alkaline cells.
The LTC3525-5 can deliver up to 175mA at 5V from a 3V input.
Both devices use synchronous rectification to enable efficiencies of up to 95%.
Their burst mode operation lowers quiescent current to only 7uA, providing maximum battery run-time in handheld applications.
The combination of an SC70 package plus only three tiny external components provides small solution footprints as required in space constrained applications.
The LTC3525-3.3 and LTC3525-5 both incorporate internal switches with an on-resistance of only 0.5ohm (N-channel) and 0.8ohm (P-channel).
Combined with novel adaptive power control switching topology, they deliver efficiencies greater than 90% to loads varying from 1 to 100mA.
Both parts offer output disconnect and inrush current limiting to restrict the current during startup, minimising surge currents seen by the input supply.
Additional features include antiringing control, short-circuit protection and thermal protection.
The LTC3525-3.3 and LTC3525-5 deliver ideal solutions for boost applications requiring up to 150mA of output current, and where a small solution size and maximum battery run-time are defining factors.
Both the LTC3525ESC6-3.3 and the LTC3525ESC6-5 are available from stock in 6-lead SC70 packages.
1000-piece pricing starts at $1.75 each. Request a free brochure from Linear Technology Corp ...
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