Fairchild Semiconductor has a 3MHz/600mA DC-DC synchronous buck converter with a specified transient response of just 20mV.

The switching device with 1.82V output voltage is designed to achieve impressive figures for transient response and power consumption. The quiescent current is 16µA.

Transient response is becoming more and more critical as processor voltages continue dropping and load regulation requirements are tightening.

“Typically, ultra-low quiescent current translates into poor transient response; however, during a load transient swing of 0 to 300mA, the FAN5350’s output sustains a fluctuation of less than 20mV,” said Peter Khairolomour, technical marketing manager at Fairchild.

The FAN5350’s 3MHz switching allows the device to employ small chip inductors (1µH) and still maintain low ripple.

Package options include both 1.00x1.37mm WLCSP and 3x3mm MLP packages.
Applications are likely to include GPS devices, Bluetooth headsets and other single-cell 2.7V to 5.5V lithium-ion-powered portable applications.

See www.fairchildsemi.com