BUY BD3447FV https://www.utsource.net/itm/p/4283466.html

Description: The BD3447FV is a high-performance, low-power, low-voltage, single-channel, DC-DC converter IC. Features: -High-efficiency DC-DC converter -Input voltage range: 2.5V to 5.5V -Output voltage range: 0.9V to 4.5V -Output current: up to 1A -High switching frequency: 1.2MHz -Low quiescent current: 0.3mA -Built-in soft-start circuit -Built-in over-current protection circuit -Built-in over-temperature protection circuit Applications: -Portable devices -Digital cameras -Mobile phones -MP3 players -Battery-powered devices (For reference only)