3

Date: 9/25/06 Rev C

SP6659 1.5MHz, 600mA Synchronous Buck Regulator

© 2006 Sipex Corporation

TYPICAL PERFORMANCE CHARACTERISTICS

CH 1: Output Voltage, 200mV per division AC-Coupled

CH 3: Inductor Current, 500mA/ div

CH 4: Load Current, 500mA/ div

CH 1: Output Voltage, 100mV per division AC-Coupled

CH 3: Inductor Current, 500mA/ div

CH 4: Load Current, 500mA/ div

Figure 1: Load Transient 0mA to 600mA

Figure 2: Load Transient 50mA to 600mA

Figure 3: Load Transient 100mA to 600mA

CH 1: Output Voltage, 100mV per division AC-Coupled

CH 3: Inductor Current, 500mA/ div

CH 4: Load Current, 500mA/ div

Figure 4: Load Transient 200mA to 600mA

CH 1: Output Voltage, 100mV per division AC-Coupled

CH 3: Inductor Current, 500mA/ div

CH 4: Load Current, 500mA/ div

Figure 6: Startup from Shutdown

CH 1: Output Voltage, 10mV per division AC-Coupled

CH 2: SW 2V/div

CH 3: Inductor Current, 500mA/ div

CH 1: RUN pin 2V/div.

CH 2: Vout 1V/div

CH 3: Inductor Current, 500mA/ div

20μS/div

20μS/div

20μS/div

20μS/div

1μS/div

Figure 5: Discontinuous Mode

40μS/div