Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LT1938
Edited by the Electronicstalk Editorial
Team on 06 February 2008
Step-down regulator majors on efficiency
Special design techniques enable high efficiency over a wide input voltage range.
The LT1938 from Linear Technology is a 2.2A, 25V step-down switching regulator packaged in a 3 x 3mm DFN The LT1938 operates from an input range of 3.6 to 25V, making it ideal for 12V and unregulated wall transformer inputs
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Its 3.1A internal switch can deliver up to 2.2A of continuous output current at voltages as low as 1.265V.
Switching frequency is user programmable from 300kHz to 2.8MHz, enabling the designer to optimise efficiency while avoiding critical noise-sensitive frequency bands.
Its 3 x 3mm DFN-10 package and high switching frequency, which keeps external capacitors and inductor small, provides a very compact, thermally efficient footprint.
The LT1938 uses a high efficiency 3.1A, 0.18ohm switch, with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die.
Special design techniques enable high efficiency over a wide input voltage range while its current mode topology enables fast transient response and excellent loop stability.
Other features include a power-good flag and soft-start capability.
The LT1938EDD pricing starts at US $2.75 each and is available from stock. Request a free brochure from Linear Technology Corp ...
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