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MBRB1035 Datasheet(PDF) 1 Page - International Rectifier |
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MBRB1035 Datasheet(HTML) 1 Page - International Rectifier |
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1 / 17 page  IRU3007 1 Rev. 2.1 08/20/02 www.irf.com TYPICAL APPLICATION DESCRIPTION The IRU3007 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 IRU3007 provides a single chip control- ler IC for the Vcore, LDO controller for GTL+ and an internal 200mA regulator for clock supply which are re- quired for the Pentium II applications. It also contains a switching controller to convert 5V to 3.3V regulator for on-board applications that uses either AT type power supply or is desired not to rely on the ATX power supply’s 3.3V output. These devices feature a patented topology that in combination with a few external components, as shown in the typical application circuit, will provide in excess of 14A of output current for an on-board DC/DC converter while automatically providing the right output voltage via the 5-bit internal DAC. The IRU3007 also fea- tures, loss-less current sensing for both switchers by using the RDS(on) of the high-side power MOSFET as the sensing 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: Under-Voltage Lockout for both 5V and 12V supplies, an external programmable soft- start function, programming the oscillator frequency via an external resistor, Over-Voltage Protection (OVP) cir- cuitry for both switcher outputs and an internal thermal shutdown. Provides Single Chip Solution for Vcore, GTL+, Clock Supply & 3.3V Switcher On-Board Second switcher provides simple control for the on-board 3.3V supply 200mA On-Board LDO Regulator Designed to meet Intel VRM 8.2 and 8.3 specifica- tion 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 Synchronous Operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Minimum Part Count Soft-Start High current totem pole drivers for directly driving the external Power MOSFETs Power Good function monitors all outputs Over-Voltage Protection circuitry protects the switcher outputs and generates a fault output Thermal Shutdown PACKAGE ORDER INFORMATION FEATURES 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK, NON-SYNCHRO- NOUS, ADJUSTABLE LDO AND 200mA ON-BOARD LDO APPLICATIONS Total Power Solution for Pentium II processor application Note: Pentium II and Pentium Pro are trademarks of Intel Corp. TA (°C) DEVICE PACKAGE 0 To 70 IRU3007CW 28-pin Plastic SOIC WB (W) Data Sheet No. PD94142 Figure 1 - Typical application of IRU3007. LINEAR CONTROL SWITCHER2 CONTROL LINEAR REGULATOR SWITCHER1 CONTROL IRU3007 VOUT 3 VOUT 2 5V VOUT1 VOUT4 |
Similar Part No. - MBRB1035 |
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Similar Description - MBRB1035 |
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