US3005 UNISEM, US3005 Datasheet
US3005
Related parts for US3005
US3005 Summary of contents
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... R11 Lin1 2 C15 US3004 Vfb1 PGd Vfb2 Lin2 3. Power Good C8 Package 20 pin Plastic SOIC WB 20 pin Plastic SOIC WB US3004/US3005 Vout 3 C10 Q3 Vout 1 C11 Vout 2 C12 R14 3004app2-1.9 C14 R15 2.5V Output Voltage Adjustable Fixed 4-1 ...
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... US3004,US3005 ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS V5 supply Voltage ........................................... 10V V12 Supply Voltage ............................................ 20V Storage Temperature Range ................................. -65 TO 150 C Operating Junction Temperature Range .......... 0 TO 125 C PACKAGE INFORMATION PACKAGE INFORMATION 20 PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW Lin2 Lin1 2 19 ...
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... Fall Time Dead band Time Oscillator Section Osc Frequency Osc Valley Osc Peak LDO Controller Section Vfb1 & Vfb2 (US3004) Vfb2 (US3005) Vfb1 (US3005) Input bias current Lin1 or Lin2 Drive Current Note 1: Vs refers to the set point voltage given in Table ...
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... Clock supply. 3 Vfb1 This pin provides the feedback for the linear regulator that its output drive is Lin1 pin. For US3005, this pin is connected to the 2.5V regulator, eliminating the external di- viders. 20 Lin2 This pin controls the gate of an external transistor for either the GTL+ linear regulator or Clock supply ...
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... Vfb2 Lin2 Lin1 Vfb1 Figure 1 - Simplified block diagram of the US3004. Rev. 1.2 12/8/00 Vset Enable PWM + Control Slope Enable Comp Osc Soft Over Current Start & Fault Logic Enable 1.5V US3004/US3005 Vfb3 V12 HDrv V12 LDrv CS- CS+ 200uA 1.1Vset PGd Gnd 0.9Vset 3004blk2-1.3 4-5 ...
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... VID4 VID3 VID2 VID1 VID0 Figure 2- Typical application of US3004 or 3005 board DC-DC converter providing the Core , GTL+, and Clock supplies for the Pentium II microprocessor. PART # US3004 US3005 Table2, describing the differences between 3004 and 3005 applications. 4-6 Q1 R16 ...
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... US3004/US3005 IR IR MOT IR Micro Metal Micro Metal Sanyo Sanyo Sanyo Sanyo Sanyo Sanyo 4-7 ...
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... US3004,US3005 TYPICAL APPLICATION TYPICAL APPLICATION Pentium with AGP C13 C3 3. 12V 12 5 R18 V12 VID4 VID3 VID2 VID1 VID0 Figure 3- Typical application of US3004 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 US3004 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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... US3004/US3005 Manuf Micro Metal Micro Metal Sanyo Sanyo Sanyo Sanyo Sanyo Sanyo 4-9 ...
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... US3004,US3005 Application Information 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, Vo=185mV, Io=14.2A b) Vo=2V , Io=14.2A, Vo=140mV, Io=14.2A The regulator design will be done such that it meets the worst case requirement of each condition. ...
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... The following heat sinks from AAVID and Thermaloy meet this crite- ria. Co. Thermalloy AAVID US3004/US3005 Part # 6078B 577002 4-11 ...
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... US3004,US3005 Following the same procedure for the Schottcky diode results in a heatsink with C/W. Although it is possible to select a slightly smaller heatsink, for sim- plicity the same heatsink as the one for the high side MOSFET is also selected for the synchronous MOSFET. Switcher Current Limit Protection ...
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... The disadvantage is that the output voltage is not ad- justable anymore. The application circuit given for Pentium II can use either US3004 or US3005 family of parts for maximum flexibility. Disabling the LDO Regulators The LDO controllers can easily be disabled by connect- ing the feedback pins, Vfb1 and Vfb2 to a voltage higher than 2 ...
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... US3004,US3005 Layout Considerations Switching regulators require careful attention to the lay- out of the components, specifically power components since they switch large currents. These switching com- ponents can create large amount of voltage spikes and high frequency harmonics if some of the critical compo- nents are far away from each other and are connected with inductive traces ...