Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT3503
Edited by the Electronicstalk Editorial Team on 05 March 2007
Step-down convertor has wide input range
Current mode PWM step-down DC/DC convertor is combined with an internal 1.45A power switch, packaged in a tiny 6-lead 2 x 3mm DFN package.
New from Linear Technology, the LT3503 is a current mode PWM step-down DC/DC convertor with an internal 1.45A power switch, packaged in a tiny 6-lead 2 x 3mm DFN package Its wide input range of 3.6 to 20V makes the LT3503 ideal for regulating power from a wide variety of sources, including unregulated wall transformers, fixed 5 and 12V rails and lead acid batteries
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Its 2.2MHz switching frequency enables the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The low collector-emitter saturation voltage (400mV at 1A) of the LT3503's internal switch offers efficiencies of up to 88%, maximising battery run-time.
An on-chip 0.78V reference enables sub-1V output voltages, and internal compensation minimises the solution footprint.
Internal cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up.
The low current (sub-2uA) shutdown provides maximum run time in battery-powered systems.
The LT3503EDCB is available from stock in a thermally enhanced 2 x 3mm DFN-6 package.
Pricing starts at US $2.25 each for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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