Semtech Corporation SC1189
The SC1189 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®III. The SC1189 switching section features an integrated 5 bit D/A converter, latched drive output for enhanced noise immunity, pulse by pulse current limiting and logic compatible shutdown. The SC1189 switching section operates at a fixed frequency of 200kHz, providing an optimum compromise between size, efficiency and cost in the intended application areas.| Part No. | SC1189 |
|---|---|
| Datasheet | SC1189 Download |
| Manufacturer |  Semtech Corporation |
| Description | Programmable Synchronous DC/DC Converter / Dual LDO Controller |
| Buy | Stock & Price |
DESCRIPTION
FEATURES
The integrated D/A converter provides programmability of output voltage from 1.05V to 1.825V in 25mV increments with no external components. The SC1189 linear sections are low dropout regulators with short circuit protection, supplying 1.25V for Vtt and 2.5V for non-GTL I/O. They can be easily adjusted to supply higher voltages e.g. 1.8V chipset. ●Synchronous design, enables no heatsink solution 95% efficiency (switching section) 5 bit DAC for output programmability Designed for Intel Pentium® III requirements 1.25V, 2.5V short circuit protected linear controllers Linear controllers adjustable to 1.8V chipset. VRM 8.5 Compliant VRM 8.4 Compliant (1.3V to 1.8V) 1.0% accuracy (1.6V to 1.8V) On Chip Power Good Signal Available in Lead free package, fully WEEE and RoHS compliant.
APPLICATIONS
Pentium® III microprocessor supplies 1.050V to 1.825V microprocessor supplies Programmable triple power supplies Simplified Application Circuit 12V 5V...
