SC1186 Datasheet PDF | Semtech Corporation

Semtech Corporation SC1186

The SC1186 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 & III. The SC1186 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 SC1186 switching section operates at a fixed frequency of 140kHz, providing an optimum compromise between size, efficiency and cost in the intended application areas.

Part No.	SC1186
Datasheet	SC1186 Download
Manufacturer	Semtech Corporation
Description	Programmable Synchronous DC/DC Converter / Dual LDO Controller
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DESCRIPTION

FEATURES

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. Synchronous design, enables no heatsink solution 95% efficiency (switching section) 5 bit DAC for output programmability Designed for Intel Pentium® ll & III requirements 1.5V, 2.5V short circuit protected linear controllers 1.265V ± 1.5% Reference available

APPLICATIONS

Pentium® ll & III microprocessor supplies Flexible motherboards 1.3V to 3.5V microprocessor supplies Programmable triple power supplies 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 made available for external linear regulators. Typical Application Circuit 12V + 5V 47uF 0.1uF + 1500uF x4 10 VID0 VID1 VID2 VID3 VID4 EN 0.1uF 3.3V 5 VCC 7 LDOEN 22 VID0 21 VID1 20 VID2 19 VID3 18 VID4 16 EN 1...