iru3004 International Rectifier Corp., iru3004 Datasheet
iru3004
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iru3004 Summary of contents
Page 1
... 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 ...
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... IRU3004 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... 10V V12 Supply Voltage .................................................. 20V Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 20-PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW Lin2 2 19 Lin1 FB1 ...
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... Table 1 - Set point voltage vs. VID codes. www.irf.com IRU3004 MIN TYP MAX UNITS 9.2 10 10.8 V 0.3 0.4 0.5 V 4.1 4.3 4.5 V 0.2 0.3 0 100 ns 160 200 240 100 ...
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... D4 This pin selects a range of output voltages for the DAC. When in the LOW state the range is 1.3V to 2.05V. For VID codes of all "1" the IRU3004 keeps all the outputs on MSB input to the DAC that programs the output voltage. This pin can be pulled-up exter- nally by a 10K resistor to either 3 ...
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... Enable D1 5Bit 18 DAC Ctrl Logic FB2 Lin2 20 Lin1 2 V FB1 3 Figure 2 - Simplified block diagram of the IRU3004. Rev. 1.7 07/16/02 Vset Enable PWM + Control Slope Comp Osc Soft Over Current Start & Fault Logic Enable 1.1Vset 1.5V 0.9Vset www.irf.com IRU3004 V 14 ...
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... V12 V5 CS VID4 VID3 VID2 VID1 VID0 Figure 3 - Typical application of IRU3004 in an on-board DC-DC converter providing the Core, GTL+, and Clock supplies for the Pentium II microprocessor R16 R12 CS- LDrv ...
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... IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3 Bipolar Trans MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic 2 C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, 15 Capacitor, Ceramic C8 Capacitor, Ceramic C9 Capacitor, Electrolytic 1 C10 Capacitor, Electrolytic 6 C11 Capacitor, Electrolytic 1 C12 ...
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... VID2 VID1 VID0 Figure 4 - Typical application of IRU3004 in a Pentium with AGP where the power dissipation of the 3.3V linear regulator is equally distributed between Q3 and Q4 pass transistors. This equal distribution is possible by accurately regulating the first regulator using the IRU3004 linear controller and its internal 1% reference voltage while the second controller regulates the output of the first regulator from 4 ...
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... IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3, 4 MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, 15 Capacitor, Ceramic C8 Capacitor, Ceramic C9 Capacitor, Electrolytic C10 Capacitor, Electrolytic C11 Capacitor, Electrolytic C12 Capacitor, Electrolytic C13 ...
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... IRU3004 APPLICATION INFORMATION An example of how to calculate the components for the application circuit is given below. Assuming, two sets of output conditions that this regu- lator must meet: a) Vo=2.8V, Io=14.2A, DVo=185mV, DIo=14.2A b) Vo=2V, Io=14.2A, DVo=140mV, DIo=14.2A The regulator design will be done such that it meets the worst case requirement of each condition. ...
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... Selecting TO-220 package gives u venders’ data sheet) and assuming that the selected heat sink is black anodized, the heat-sink-to-case ther- mal resistance is u temperature is then calculated as OFF Ts = 125 - 3.82 3 (1.8 + 0.05) = 1188C L www.irf.com IRU3004 = 5ms = 0.61 1.9 = 1.94A 3 (2.8 + 0.27 DS(MAX 0.029 = 3.8W ...
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... IRU3004 With the maximum heat sink temperature calculated in the previous step, the heat-sink-to-air thermal resistance ( calculated as follows: SA Assuming T = 358C 118 - 35 = 838C A Temperature Rise Above Ambient 228C 3.82 D Next, a heat sink with lower u than the one calculated SA in the previous step must be selected ...
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... For example, with 1mF and the 10mA internal cur- rent source the ramp up rate is (DV/Dt)=(I/C)=1V/100ms. Assuming that the output capacitance is 9000mF, the maximum start up current will be 9000mF 3 (1V / 100ms) = 0.09A www.irf.com IRU3004 and voltage higher FB1 FB2 ( ) ...
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... IRU3004 Input Filter It is recommended to place an inductor between the system 5V supply and the input capacitors of the switch- ing regulator to isolate the 5V supply from the switching noise that occurs during the turn on and off of the switch- ing components. Typically an inductor in the range 3mH will be sufficient in this type of application ...
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... NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.7 07/16/02 (F) TSSOP Package 20-Pin 20-PIN SYMBOL DESIG MIN NOM MAX 0.65 BSC A B 4.30 4.40 4.50 C 6.40 BSC 0.19 --- 0. 1.00 F 1.00 6.40 6.50 6. --- --- 1.10 J 0.85 0.90 0.95 0.05 --- 0. 128 REF M 128 REF 08 --- 1.00 REF P 0.50 0.60 0.75 Q 0.20 R 0.09 --- --- R1 0.09 --- --- www.irf.com IRU3004 DETAIL A DETAIL A 15 ...
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... IRU3004 20-Pin Surface Mount, Wide Body PIN NO. 1 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 16 (W) SOIC Package C E DETAIL 0.51 0.020 SYMBOL 20-PIN MIN MAX A 12.598 12.979 B 1.018 1.524 C 0.66 REF D 0.33 0.508 E 7.40 7.60 F 2.032 2.64 G 0.10 0.30 I 0.229 0.32 J 10.008 10.654 K 08 ...
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... PIN PARTS COUNT PER TUBE Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 www.irf.com IRU3004 PARTS T & R PER REEL Orientation 2500 Fig A 1000 Fig Feed Direction Figure B TAC Fax: (310) 252-7903 ...