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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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SC1185ACSW.TR Datenblatt(PDF) 1 Page - Semtech Corporation |
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SC1185ACSW.TR Datenblatt(HTML) 1 Page - Semtech Corporation |
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1 / 14 page  POWER MANAGEMENT 1 www.semtech.com SC1185 & SC1185A Programmable Synchronous DC/DC Converter, Dual LDO Controller Features Applications Revision: July 28, 2005 Description The SC1185 combines a synchronous voltage mode con- troller 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 . The SC1185 switching section features an integrated 5 bit D/A converter, pulse by pulse current limiting, inte- grated power good signaling, and logic compatible shut- down. The SC1185 switching section operates at a fixed frequency of 140kHz, providing an optimum compromise between size, efficiency and cost in the intended appli- cation areas. The integrated D/A converter provides pro- grammability of output voltage from 2.0V to 3.5V in 100mV increments and 1.30V to 2.05V in 50mV incre- ments with no external components. The SC1185 linear sections are low dropout regulators supplying 1.5V for GTL bus and 2.5V for non-GTL I/O. The Reference voltage is made available for external lin- ear regulators. 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 requirements 1.5V, 2.5V @ 1.25% for linear section 1.265V ± 1.5% Reference available 24-lead SO package. Lead free option available. Lead free product is fully WEEE and RoHS compliant. Pentium® ll microprocessor supplies Flexible motherboards 1.3V to 3.5V microprocessor supplies Programmable triple power supplies Typical Application Circuit 1.00k PWRGOOD 2.5V + 1500uF 2R2 IRLR3103N + 330uF 1k VLIN3 x4 0.1uF 1.9uH + 330uF VID3 3.3V SC1185CS 1 5 6 7 8 9 10 11 15 16 17 18 19 20 21 22 13 12 14 24 2 23 3 4 AGND VCC REF PWRGOOD CS- CS+ PGNDH DH BSTH EN VOSENSE VID4 VID3 VID2 VID1 VID0 DL PGNDL BSTL GATE2 GATE1 LDOV LDOS1 LDOS2 + 330uF VID1 VID0 VID2 + 330uF 2.32k 0.1uF IRLR024N + 1500uF 5V + 4.7uF 1.5V VID4 x6 5mOhm IRLR024N EN 0.1uF VCC_CORE 2R2 12V IRLR024N 3.3V 0.1uF 12V IRLR3103N 10 + - LM358 3 2 1 8 4 |
Ähnliche Teilenummer - SC1185ACSW.TR |
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Ähnliche Beschreibung - SC1185ACSW.TR |
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