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IRU3034 Datasheet(PDF) 6 Page - International Rectifier |
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IRU3034 Datasheet(HTML) 6 Page - International Rectifier |
6 / 12 page IRU3034 & (PbF) 6 www.irf.com Figure 4 - The circuit in figure 4 is the application of the IRU3034 which is done using a dual layout with IRU3033 in a switching mode only. This circuit can be used to generate a low cost 5V to 3.3V for either Pentium application with AGP socket or in Pentium II applications where it is desirable to generate an accurate on-board 3.3V supply. TYPICAL APPLICATION 5V to 3.3V for Pentium Application with AGP or Pentium II Application without ATX power supply Switching mode Operation. (IRU3034 and IRU3033 Dual Layout) Ref Desig Description Qty Part # Manuf U1 LDO/Switcher IC 1 IRU3034CS (8-Pin SOIC) IR Q2 MOSFET 1 IRL3303 (TO-220) IR IRL3103S (TO-263) (Note 1) D1 Schottky Diode 1 MBR1045CT (TO-220) MBRB1545CT (TO-263) (Note1) Motorola L2 Inductor 1 Core: T50-18, L=4µH Micro Metal Turns: 10T, 18 AWG (core) L1 Inductor 1 L=2µH R1 Resistor 1 22Ω, 5%, SMT 1206 size R9 Resistor 1 Open for IRU3034, 10Ω for IRU3033 R2 Resistor 1 10Ω, 5%, SMT 1206 size R3 Resistor 1 249KΩ, 1%, SMT 0805 size R4 Resistor 1 1KΩ, 1%, SMT 0805 size R5 Resistor 1 576Ω, 1%, SMT 0805 size R6 Resistor 1 5mΩ, 5%, 2W R7 Resistor 1 4.99KΩ, 1%, SMT 0805 size R8 Resistor 1 4.7KΩ, 5% for IRU3034, Open for IRU3033 C1, 2 Capacitor 2 6MV1500GX, 1500µF, 6.3V, Elect Sanyo C3 Capacitor 1 1µF, Ceramic, SMT 0805 size C4 Capacitor 1 470pF, Ceramic, SMT 0805 size Sanyo C5 Capacitor 1 10pF, Ceramic, SMT 0805 size Sanyo C6 Capacitor 1 4700pF for IRU3034, Open for IRU3033 C7 Capacitor 2 6MV1500GX, 1500µF, 6.3V, Elect Sanyo C8 Capacitor 1 0.047µF for IRU3034 , 0.1µF for 3033 HS1 Heat Sink 1 For MOSFET, 577002 Aavid HS2 Heat Sink 1 For Schottky Diode, 577002 Aavid Note: For the applications where it is desirable to eliminate the heat sink, the IRL3103S for Q2 and MBR1545CT for D2 in TO-263 packages with minimum of 1" square copper pad can be used. VOUT 5V C1 L1 C3 Q2 C2 L2 R4 C7 D1 R2 C4 R5 R1 R3 C5 R8 R6 C6 R7 12V C8 R9 Drv V12 VFB VHYST Gnd CS-/ VFB2 CS+/ Drv2 SS/ V12 U1 |
Similar Part No. - IRU3034 |
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Similar Description - IRU3034 |
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