The PT7712 ExcaliburTM power module is a 20-A integrated switching regulator (ISR) housed a 27-pin space-saving copper package. Operating from a 3.3V input bus, the PT7712 produces a tightly regulated output voltage that is programmable over the range, 1.3V to 2.05V. The output voltage is selected via a 4-bit code, which is compatible with the VRM specifications defined by Intel. This regulator is most suitable for microprocessor and DSP applications requiring core or I/O logic supply voltages as low as 1.3V.