SC1182

·  Synchronous design, enables no heatsink solution
·  95% efficiency (switching section)
·  5 bit DAC for output programmability
·  On chip power good function
·  Designed for Intel Pentium^® ll VRM8.1 requirements
·  1.5V, 2.5V or Adj. @ 1% for linear section

· Pentium^® ll or Deschutes microprocessor supplies
· Flexible motherboards
· 1.3V to 3.5V microprocessor supplies
· Programmable triple power supplies

The SC1182/3 combines a synchronous voltage mode controller with two low-dropout linear regulators providing most of the circuitry necessary to implement three DC/DC converters for powering advanced microprocessors such as Pentium^® II (Klamath) or Deschutes.

The SC1182/3 switching section features an integrated 5 bit D/A converter, pulse by pulse current limiting, integrated power good signaling, and logic compatible shutdown. The SC1182/3 switching section operates at a fixed frequency of 200kHz, providing an optimum compromise between size, efficiency and cost in the intended application areas. The integrated D/A converter provides programmability of output voltage from 2.0V to 3.5V in 100mV increments and 1.30V to 2.05V in 50mV increments with no external components.

The SC1182/3 linear sections are low dropout regulators. The SC1182 supplies 1.5V for GTL bus and 2.5V for non-GTL I/O.