The XCL205/206/207 series, is a 600mA, 3MHz synchronous step-down DC-DC converter with integrated coil. The whole solution, including inductor, measures only 2.5mm x 2.0mm and has a package profile of only 1.0mm making it one of the smallest solutions of its kind on the market today! Requiring only 2 external ceramic capacitors to configure a step-down circuit capable of providing efficiencies in excess of 85%, the XCL205/206/207 is ideally suited for applications that require high efficiency plus low output noise in an extremely small PCB area.

Features:

• Input Voltage: 2.0V ~ 6.0V
• Output Voltage: 0.8V ~ 4.0V
• Output Current: 600mA
• Oscillator Frequency: 3MHz
• Compatible with ceramic capacitors
• Built-in soft start circuit
• Built-in current limiter circuit
• Stand-by Current: 1.0μA (max)
• Small 2.5mm x 2.0mm x 1.0mm package

Details can be found here.