RC5041M ETC-unknow, RC5041M Datasheet
RC5041M
Available stocks
Related parts for RC5041M
RC5041M Summary of contents
Page 1
RC5041 Programmable DC-DC Converter for Pentium P55C, K6™, and 6x86MX™ (M2) Processors Features • Programmable output from 2.1V to 3.5V using integrated 4-bit DAC • 87% efficiency • Oscillator frequency adjustable from 200KHz to 1MHz • On-chip Power Good function ...
Page 2
RC5041 Pin Assignments Pin Definitions Pin Number Pin Name Pin Function Description 1 CEXT Oscillator capacitor connection. Connecting an external capacitor to this pin sets the internal oscillator frequency from 200 KHz to 1 MHz. Layout of this pin is ...
Page 3
PRODUCT SPECIFICATION Table 1. Voltage Identification Codes for P55/K6 Data Bits VID3 VID2 VID1 VID0 ...
Page 4
RC5041 Electrical Specifications ( 2.8V 300 KHz, and T CCA OUT osc The denotes specifications which apply over the full operating temperature range. Parameter Output Voltage Regulation 1 Steady State 2 Transient Efficiency Output ...
Page 5
... Resistor, 1/8W, 5%, SMT0805 M1 N-ch Power FET U1 PWM Controller, Raytheon RC5041M Note: 1. The inductor L2 is recommended to isolate the 5V ipower supply from current surges caused by the MOSFET switching. This inductor is not required for the proper operation of the DC-DC converter and can be substituted with a ferrite beads inductor or omitter completely ...
Page 6
RC5041 +12V 47 0.1 F VCCQP +5V VCCA HIDRV 0.1 F RC5041 VCCD 4.7 F GNDA GNDD GNDP Application Information Simple Step-Down Converter Figure 3. Simple Buck DC-DC Converter Figure 3 illustrates a step-down ...
Page 7
PRODUCT SPECIFICATION Main Control Loop Refer to the Block Diagram on page 1. The control loop of the regulator contains two main sections, the analog control block and the digital control block. The analog block con- sists of signal conditioning ...
Page 8
RC5041 Design Considerations and Component Selection MOSFET Selection This application requires N-channel Logic Level Enhance- ment Mode Field Effect Transistors. Desired characteristics are as follows: • Low Static Drain-Source On-Resistance, R < (lower is better) DS(on) Table 3. ...
Page 9
PRODUCT SPECIFICATION Two MOSFETs in Parallel For high current requirements, we recommend that two MOSFETs be used in parallel instead of one single MOS- FET. Significant advantages are realized using two MOS- FETs in parallel: • Significant reduction of power ...
Page 10
RC5041 Converter Efficiency Losses due to parasitic resistance in the switches, coil, and sense resistor dominate at high load-current level. The major loss mechanisms under heavy loads, in usual order of importance, are: 2 • MOSFET I R Losses Efficiency ...
Page 11
PRODUCT SPECIFICATION Selecting the Inductor The inductor is one of the most critical components to be selected in the DC-DC converter application.. The critical parameters are inductance (L), maximum DC current (Io) and the coil resistance (R1). The inductor core ...
Page 12
RC5041 Table 5. Comparison of Sense Resistors Motherboard Description Trace Resistor Tolerance 29% Factor (TF) Size 2" x 0.2" x 0.001" trace) Power capability >50A/in Temperature +4,000 ppm Coefficient Cost Low @10,000 ...
Page 13
PRODUCT SPECIFICATION RC5041 Short Circuit Current Characteristics The RC5041 has a short circuit current characteristic that includes a hysteresis function that prevents the DC-DC converter from oscillating in the event of a short circuit. A typical V-I characteristic of the ...
Page 14
RC5041 PCB Layout Guidelines and Considerations PCB Layout Guidelines • Placement of the MOSFETs relative to the RC5041 is critical. The MOSFETs (M1 & M2), should be placed such that the trace length of the HIDRV pin from the RC5041 ...
Page 15
PRODUCT SPECIFICATION Mechanical Dimensions – 16 Lead SOIC Inches Millimeters Symbol Min. Max. Min. A .053 .069 1.35 A1 .004 .010 0.10 B .013 .020 0.33 C .008 .010 0.19 D .386 .394 9.80 E .150 .158 3.81 e .050 ...
Page 16
... Ordering Information Product Number Package RC5041M 16 pin SOIC The information contained in this data sheet has been carefully compiled; however, it shall not by implication or otherwise become part of the terms and conditions of any subsequent sale. Raytheon’s liability shall be determined solely by its standard terms and conditions of sale. ...