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IRU3004 データシート(PDF) 1 Page - International Rectifier |
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IRU3004 データシート(HTML) 1 Page - International Rectifier |
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1 / 17 page  IRU3004 1 Rev. 1.7 07/16/02 www.irf.com TYPICAL APPLICATION DESCRIPTION The IRU3004 controller IC is specifically designed to meet Intel specifications for Pentium III ™ microprocessor applications as well as the next generation P6 family processors. The IC provides a single chip controller IC for the Vcore, GTL+ and clock supplies required for the Pentium III applications. The IRU3004 features a pat- ented topology, that in combination with a few external components as shown in the typical application circuit, will provide in excess of 20A of output current for an on- board DC-DC converter while automatically providing the right output voltage via the 5-bit internal DAC meeting the latest VRM specification. The IRU3004 also features loss-less current sensing by using the RDS(on) of the high side power MOSFET as the sensing resistor and a Power Good window comparator that switches its open collec- tor output low when the output is outside of a ±10% window. Other features of the device are: under-voltage lockout for both 5V and 12V supplies, an external pro- grammable soft-start function as well as programming the oscillator frequency by using an external capacitor. Meets latest VRM 8.4 specification for PentiumIII Provides single chip solution for Vcore, GTL+ and clock supply On-Board DAC programs the output voltage from 1.3V to 3.5V. The IRU3004 remains on for VID code of (11111) Dual linear regulator controller on-board for 1.5V GTL+ and 2.5V clock supplies Loss-less Short Circuit Protection Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency opera- tion as well as 100% duty cycle during dynamic load Minimum Part Count, No External Compensation Soft-Start Function High current totem pole driver for direct driving of the external power MOSFET Power Good Function PACKAGE ORDER INFORMATION FEATURES 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH DUAL LDO CONTROLLER APPLICATIONS Pentium III & next generation processor DC to DC converter application Low Cost Pentium with AGP TA ( 8C) DEVICE PACKAGE 0 To 70 IRU3004CW 20-Pin Plastic SOIC (W) 0 To 70 IRU3004CF 20-Pin Plastic TSSOP (F) Note: Pentium III is trademark of Intel Corp. Data Sheet No. PD94140 Figure 1 - Typical application of the IRU3004. VOUT 3 5V 12V VID0 VOUT 2 VOUT 1 3.3V Q2 C9 Q4 VID1 VID2 VID3 VID4 L1 L2 C5 R1 C3 C4 C6 Q1 R2 R3 C7 R4 C10 Q3 R7 R8 C11 C12 C1 C2 C13 R9 R11 C15 C14 R12 R14 R15 Power Good R5 C8 3.3V R16 R17 R13 C16 R18 HDrv LDrv Ct SS CS+ Gnd VFB3 D3 D2 D4 D1 D0 PGd IRU3004 Lin1 VFB1 CS- V12 V5 VFB2 Lin2 |
同様の部品番号 - IRU3004 |
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同様の説明 - IRU3004 |
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