Step-Down DC/DC Converter in 3mm x 3mm DFN

Switching frequency is user programmable from 300kHz to 2.8MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. Its 3mm 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 utilizes a high efficiency 3.1A, 0.18 Ohm 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 $2.75 each and is available from stock.