Managing wide variations in input/output voltage ratios, the device control algorithm also helps minimize external component count and enables the use of both low and ultra-low equivalent series resistance capacitors. The converter is available in the SO-8EP package and suitable for 5V, 9V and 12V bus systems, due to its stable 4.5V to 18V operating voltage range.

The buck converter’s automatic light-load efficiency-improvement feature ensures seamless transition between continuous conduction mode at higher loads and discontinuous conduction mode at lighter loads. This helps designers comply with low power consumption regulations and achieves operating efficiencies as high as 92%.

To protect downstream components from damage and premature aging, the converter integrates a complete suite of protection features, including under- voltage lockout, thermal shutdown, over-current protection and programmable soft-start.

Features:

－ Fixed Frequency Emulated Constant On-time Control

－ Good Stability Independent of the Output Capacitor ESR

－ Fast Load Transient Response

－ Synchronous Rectification: 65mΩ Internal High-side Switch and 36mΩ Internal Low-side Switch

－ Wide Input Voltage Range: 4.5V to 18V

－ Output Voltage Range: 0.76V to 6V

－ 5A Continuous Output Current

－ 650kHz Switching Frequency

－ Built-in Over Current Limit

－ Built-in Thermal Shutdown Protection

－ Programmable Soft-start

－ Pre-biased Start-up

－ Totally Lead-Free & Fully RoHS Compliant

－ Halogen and Antimony Free. “Green” Device