The EL7563C and the EL7564C target applications in the communications, graphics, and PC markets that require high-density, small form factor ASIC logic boards, lower operating voltages, smaller PCB space, and higher efficiency power supply designs. In addition, PWM oscillator frequency can be set with a single external capacitor or synchronized with an external clock to prevent interference in the total power-supply system design. The switching frequency is preset, up to 1 MHz, and multiple parts can be synchronized together. A single inductor is required although the input and output capacitor requirements are quite high at a suggested 330 uF, with no information on the product briefs as to what sort of capacitor is needed. I love the current sensing without using a resistor.
Evaluation boards are available.