Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3563
Edited by the Electronicstalk Editorial
Team on 19 July 2007
Regulator powers baseband chipsets
High-efficiency 2.25MHz synchronous buck regulator has pin-selectable output of 1.28 or 1.87V, making it ideal for the latest generation of Agere cellphone baseband chipsets.
The LTC3563 form Linear Technology is a high-efficiency 2.25MHz synchronous buck regulator that can deliver up to 500mA of continuous output current from a 2 x 2mm DFN package Its output voltage is pin-selectable to either 1.28 or 1.87V, making it ideal for the latest generation of Agere cellphone baseband chipsets
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Using a constant frequency and current mode architecture, the LTC3563 operates from an input voltage range of 2.5 to 5.5V, compatible with single cell Li-ion, or multiple-cell alkaline/NiCad/NiMH applications.
Its 2.25MHz switching frequency enables the use of tiny, low cost ceramic capacitors and inductors less than 1mm in height, providing a very compact solution footprint for handheld applications.
The LTC3563 uses internal switches with an on-resistance of only 0.35ohm (N-channel) and 0.50ohm (P-channel) to deliver efficiencies as high as 96%.
It also uses low-dropout 100% duty cycle operation to allow output voltages equal to the input, further extending battery run time.
The LTC3563 uses low ripple (below 20mV peak-peak) Burst Mode operation, drawing only 26uA of no load quiescent current.
Shutdown current is less than 1uA further maximising battery run time.
Other features include +/-2% output voltage accuracy, internal soft-start and overtemperature protection.
The LTC3563EDC is available in a 2 x 2mm DFN-6 package and is available from stock.
Pricing starts at US $1.60 each in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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