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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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US3018 Fiches technique(PDF) 1 Page - UNISEM |
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US3018 Fiches technique(HTML) 1 Page - UNISEM |
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1 / 17 page  US3018 4-1 Rev. 1.4 12/8/00 TYPICAL APPLICATION TYPICAL APPLICATION DESCRIPTION DESCRIPTION The US3018 controller IC is specifically designed to meet Intel specification for Pentium II ™ microprocessor ap- plications as well as the next generation of P6 family processors. The US3018 provides a single chip con- troller IC for the Vcore , LDO controller for GTL+ and an internal 200mA regulator for clock supply which are required for the Pentium II applications. These devices feature a patented topology that in com- bination with a few external components as shown in the typical application circuit ,will provide in excess of 18A of output current for an on- board DC/DC converter while automatically providing the right output voltage via the 5 bit internal DAC. The US3018 also features, loss less current sensing for both switchers by using the Rds-on of the high side Power MOSFET as the sens- ing resistor, internal current limiting for the clock supply, a Power Good window comparator that switches its open collector output low when any one of the out- puts is outside of a pre programmed window. Other fea- tures of the device are ; Undervoltage lockout for both 5V and 12V supplies, an external programmable soft start function , programming the oscillator frequency via an external resistor, OVP circuitry for both switcher out- puts and an internal thermal shutdown. Provides Single Chip Solution for Vcore, GTL+ & Clock Supply 200 mA On board LDO regulator Designed to meet the latest Intel specification for Pentium II ™ On board DAC programs the output voltage from 1.3V to 3.5V Linear regulator controller on board for 1.5V GTL+ supply Loss less Short Circuit Protection with HICCUP Synchronous operation allows maximum effi- ciency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Soft Start High current totem pole driver for direct driv- ing of the external Power MOSFET Power Good function Monitors all Outputs OVP Circuitry Protects the Switcher Output and generates a Fault signal Thermal Shutdown Logic Level Enable Input PACKAGE ORDER INFORMATION PACKAGE ORDER INFORMATION PRELIMINARY DATASHEET FEATURES FEATURES 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD APPLICATIONS APPLICATIONS Total Power Soloution for Pentium II processor application Notes: Pentium II is trade mark of Intel Corp. Ta ( °C) Device Package 0 TO 70 US3018CW 24 pin Plastic SOIC WB 3018app3-1.1 LINEAR CONTROL LINEAR REGULATOR SWITCHER1 CONTROL US3018 Vout3 5V Vout1 Vout2 3.3V |
Numéro de pièce similaire - US3018 |
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Description similaire - US3018 |
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