RC5051M Fairchild Semiconductor, RC5051M Datasheet
RC5051M
Specifications of RC5051M
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RC5051M Summary of contents
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RC5051 Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors Features • Programmable output from 1.3V to 3.5V using an integrated 5-bit DAC • 85% efficiency typical • Adjustable operation from 80KHz to 1MHz • Integrated Power Good and Enable functions ...
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RC5051 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. Layout of this pin is critical to system performance. See ...
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PRODUCT SPECIFICATION Absolute Maximum Ratings Supply Voltages, VCCA, VCCP, VCCQP to GND Supply Voltage VCCQP, Charge Pump (V Voltage Identification Code Inputs, VID4-VID0 Junction Temperature Storage Temperature Lead Soldering Temperature, 10 seconds Operating Conditions Parameter Supply Voltage, VCCA, ...
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RC5051 Table 1. Output Voltage Programming Codes VID4 VID3 ...
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PRODUCT SPECIFICATION Typical Operating Characteristics (VCCA, VCCD = 5V 280 KHz, and T OSC Efficiency vs. Output Current 88.0 86.0 84.0 82.0 80 2.0V OUT 78.0 76.0 74.0 72.0 70 Output ...
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RC5051 Typical Operating Characteristics Output Ripple, 2.8V @ 14.2A Time (1 s/division) Switching Waveforms, 9A Load Time (1 s/division) 6 (continued) Transient Response, 14.2A to 0.8A Transient Response, 0.8A to 14.2A Time (1 s/division) Output Startup, System Power-up HIDRV pin ...
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PRODUCT SPECIFICATION Typical Operating Characteristics Output Startup from Enable Time (2ms/division) Application Circuit +12V L1 +5V 2 0.1 F VREF C3 0.1 F VID4 VID3 VID2 VID1 VID0 Figure 1. 15A Application Circuit for Pentium ...
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... Fairchild SENSE RC10-XX* U1 Fairchild RC5051M * See Table 3. Notes: 1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply with Intel dl/dt requirements. L1 may be omitted if desired. 2. For 14.2A designs using the FDP6030L MOSFETs, heatsinks with thermal resistance details and a spreadsheet on MOSFET selections, refer to Applications Bulletin AB-8 ...
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PRODUCT SPECIFICATION Table 3. Recommended Values for CPU-based Applications Output Application Current C 300MHz AMD K6 13A Motherboard 300 MHz Intel Pentium 14.2A Motherboard 400MHz Intel Pentium II 12.6A Motherboard * Output capacitance and ESR requirements depend critically on layout ...
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RC5051 Application Information The RC5051 Controller The RC5051 is a programmable synchronous DC-DC con- troller IC. When designed around the appropriate external components, the RC5051 can be configured to deliver more than 19A of output current, as appropriate for the ...
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... Design Considerations and Component Selection Additional information on design and component selection may be found in Fairchild Semiconductor’s Application Note 53. MOSFET Selection This application requires N-channel Logic Level Enhance- ment Mode Field Effect Transistors. Desired characteristics are as follows: • ...
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RC5051 +12V 47 D1 VCCQP HIDRV 1 F PWM/PFM Control LODRV GNDP Figure 4. Gate Bias Configuration Inductor Selection Choosing the value of the inductor is a tradeoff between allowable ripple voltage and required transient response. The system designer can ...
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PRODUCT SPECIFICATION determined by the transient response and the output ripple voltage, and these are determined by the ESR and not the capacitance value. That is, in order to achieve the necessary ESR to meet the transient and ripple requirements, ...
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... PRODUCT SPECIFICATION RC5051 Evaluation Board Fairchild Semiconductor provides an evaluation board to verify the system level performance of the RC5051. It serves as a guide to performance expectations when using the sup- plied external components and PCB layout. Please call the marketing department at 650-968-9211 x 7833 for an evalua- tion board ...
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PRODUCT SPECIFICATION Mechanical Dimensions – 20 Lead SOIC Inches Millimeters Symbol Min. Max. Min. Max. A .093 .104 2.35 2.65 A1 .004 .012 0.10 0.30 B .013 .020 0.33 0.51 C .009 .013 0.23 0.32 D .496 .512 12.60 13.00 ...
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... RC5051 Ordering Information Product Number Package RC5051M 20 pin SOIC LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems ...