The SC1186 combines a programmable synchronous DC/DC converter with dual low dropout regulator controllers. It provides most of the circuitry necessary to implement three DC/DC converters for powering advanced microprocessors such as Pentium II and III. The SC1186 features an integrated D/A converter, latched drive output, pulse by pulse current limiting, and logic compatible shutdown. It operates at a fixed frequency of 140kHz, striking an optimum compromise between size, efficiency, and cost in the intended application areas. The integrated D/A converter allows programmability of output voltage from 2.0V to 3.5V in 100mV increments without the need for external components. The SC1186 linear sections are low dropout regulators with short circuit protection, supplying 1.5V for GTL bus and 2.5V for non-GTL I/O. The reference voltage is available for external linear regulators.
The SC1186 combines a synchronous voltage mode controller with two low-dropout linear regulators to implement three DC/DC converters. The switching section operates at a fixed frequency of 140kHz and features an integrated 5-bit D/A converter for programmable output voltage from 2.0V to 3.5V without external components. It is designed to meet the power supply requirements of Intel Pentium II and III microprocessors.
| Oscillator Frequency | 140 kHz |
|---|---|
| Output Voltage Range | 2.0V to 3.5V |
| Supply Voltage | 4.5V to 7V |
| Operating Temperature Range | 0 to +125°C |
| Efficiency | 95% |
| Linear Output Voltages | 1.5V and 2.5V |
The SC1186 is designed for Intel Pentium II and III microprocessor supplies.
The switching section operates at a fixed frequency of 140kHz.
No, it provides programmability of output voltage with no external components.