RC5057M Fairchild Semiconductor, RC5057M Datasheet
RC5057M
Specifications of RC5057M
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RC5057M Summary of contents
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RC5057 High Performance Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors Features Applications Block Diagram OSC - + 1.24V 5-Bit Reference DAC 16 15141312 VID2 VID4 VID0 VID1 VID3 Pentium is a registered trademark of Intel Corporation Description +5V VCCA ...
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RC5057 Pin Assignments ENABLE/SS Pin Definitions Pin Number Pin Name 1 ENABLE/SS Output Enable/Softstart. A logic LOW on this pin will disable the output. An internal current source allows for open collector control. This pin also doubles as soft start. ...
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PRODUCT SPECIFICATION Absolute Maximum Ratings Supply Voltage VCCA to GND Supply Voltage VCCP to GND Voltage Identification Code Inputs, VID0-VID4 Junction Temperature Storage Temperature Lead Soldering Temperature, 10 seconds Power Dissipation Thermal Resistance Junction-to-case, Recommended Operating ...
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RC5057 Electrical Specifications unless otherwise noted.) Parameter Output Voltage Output Current Initial Voltage Setpoint Output Temperature Drift Line Regulation 3 Internal Droop Output Ripple Total Output Variation, 1 Steady State Total Output Variation, 2 Transient Short Circuit Detect Current Efficiency ...
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PRODUCT SPECIFICATION Table 1. Output Voltage Programming Codes VID4 VID3 ...
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RC5057 Typical Operating Characteristics 1, unless otherwise noted.) Efficiency vs. Output Current 1.550V OUT Output Current (A) 3.5 3.0 2.5 ...
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PRODUCT SPECIFICATION Typical Operating Characteristics (continued) Output Ripple, 2.0V @ 18A Time (1 s/division) Switching Waveforms, 18A Load Time (1 s/division) REV. 1.2.0 2/10/00 Transient Response, 12.5A to 0.5A Transient Response, 0.5A to 12.5A Time (100 s/div) Output Startup, System ...
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RC5057 Typical Operating Characteristics (continued) Output Startup from Enable Time (10ms/division) Application Circuit +12V L1 (Optional) 2 4.7 F VID4 VID3 VID2 VID1 VID0 8 2.042 2.040 2.038 2.036 2.034 2.030 2.028 ...
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... Any R6 Any U1 Fairchild RC5057M Notes: 1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply with Intel dI/dt requirements. L1 may be omitted if desired. 2. For designs using the TO-220 MOSFETs, heatsinks with thermal resistance the TO-263 MOSFETs, adequate copper area should be used. For details and a spreadsheet on MOSFET selections, refer to Applications Bulletin AB-8 ...
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RC5057 +12V L1 (Optional) 2 4.7 F VID4 VID3 VID2 VID1 VID0 Figure 2. Application Circuit for Coppermine/Camino Processors 1N4148 4.7 R3 4.7 9 ...
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... R10 Dale WSL-2512-.01 U1 Fairchild RC5057M Notes: 1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply with Intel dI/dt requirements. L1 may be omitted if desired. 2. For designs using the TO-220 MOSFETs, heatsinks with thermal resistance the TO-263 MOSFETs, adequate copper area should be used. For details and a spreadsheet on MOSFET selections, refer to Applications Bulletin AB-8 ...
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RC5057 +12V L1 (Optional) 2 4.7 F VID4 VID3 VID2 VID1 VID0 Figure 3. Application Circuit for Coppermine/Camino Processors 4 ...
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... Any R7 N/A U1 Fairchild RC5057M Notes: 1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply with Intel dI/dt requirements. L1 may be omitted if desired. 2. For designs using the TO-220 MOSFETs, heatsinks with thermal resistance the TO-263 MOSFETs, adequate copper area should be used. For details and a spreadsheet on MOSFET selections, refer to Applications Bulletin AB-8 ...
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RC5057 Application Information The RC5057 Controller Main Control Loop High Current Output Drivers 14 PRODUCT SPECIFICATION Internal Voltage Reference Power Good (PWRGD) Output Enable/Soft Start (ENABLE/SS) Over-Voltage Protection Oscillator Design Considerations and Component Selection REV. 1.2.0 2/10/00 ...
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PRODUCT SPECIFICATION MOSFET Selection Inductor Selection (V in – out out min – out = max REV. 1.2.0 2/10/00 RC5057 ...
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RC5057 1N4148 R 5 IFB R SENSE SW Figure 6. Precision Current Sensing Schottky Diode Selection Output Filter Capacitors 16 Input Filter VOUT 5V 0.1 F Active Droop PRODUCT SPECIFICATION 2.5 H Vin 1000 F, 10V Electrolytic Figure 7. Input ...
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PRODUCT SPECIFICATION PCB Layout Guidelines Additional Information REV. 1.2.0 2/10/00 Appendix Worst-Case Formulae for the Calculation R5, and C (Circuit of Figure 1 Only) out in V nom IO * – ...
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RC5057 Example: 2 2.000 2.000 – 14 3.47 4 caps 0.134 – 0.004 * 2.000 PRODUCT SPECIFICATION 14.2 * 0.010 * (1 + 0.67) * 1.10 5.2K ...
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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 0.33 .020 C .008 .010 0.19 D .386 .394 9.80 E .150 .158 3.81 e .050 BSC ...
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... RC5057 Ordering Information Product Number Package RC5057M 16 pin SOIC DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...