The TMI32531S is a high efficiency, 600kHz,  constant on-time (COT) control mode synchronous  Buck converter with a wide input voltage range of  4.5V to 18V, and supports up to 3A continuous  output current. TMI32531S integrates main switch  and synchronous switch with very low RDS(ON) to  minimize the conduction loss. Low output voltage  ripple and small external inductor and capacitor size  are achieved with 600kHz switching frequency. It  adopts the COT architecture to achieve fast transient  response for high voltage step down applications. The TMI32531S requires a minimum number of  external components and is available in a 6-pin  SOT23-6 ROHS compliant package.