2.4MHz Step-Down DC/DC Converter in 3mm x 3mm DFN

The LT1913’s switching frequency is user programmable from 200kHz to 2.4MHz, enabling designers to optimize efficiency while avoiding critical noise-sensitive frequency bands and keeping externals small. The combination of its high switching frequency and tiny 3mm x 3mm DFN package ensure a very compact solution foot print.

The LT1913 utilizes a high efficiency 4.6A, 95mOhm switch which can deliver up to 90% efficiency. The necessary boost diode, oscillator, control and logic circuitry are integrated into a single chip. Special design techniques used in the LT1913 enable high efficiency over a wide input voltage range, and the device’s current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250kHz to 2MHz), a power good flag and soft-start capability.