SP3406

SP3406 600mA Buck Converter DESCRIPTION SP3406 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages, such as 1.5V,1.8V,etc. Supply current with no load is 30uA and drops to <1uA in shutdown. The 2.5 to 6.5V input voltage range makes the SP3406 ideally suitable for single Li-Ion, two to four AA battery-powered applications. In low dropout operation mode, the duty cycle can reach to 100%, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The SP 3406 is available in a small SOT-23-5 package. APPLICATIONS Digital Camera PDA Hand Held Communication Equipment Wireless and DSL Modems Portable instrument Microprocessor and DSP Core Supplies MID or UPMC FEATURES High Efficiency: Up to 96%; 1.5MHz Constant Switching Frequency; 600mA Output Current at Vin=3V; Integrated Main Switch and Synchronous Rectifier, No Schottky Diode Required; 2.5 to 6.5V input voltage; Output Voltage as Low as 0.6V; 100% Duty Cycle in Dropout; Quiescent Current: 30uA(input<...