Data SheetTable of ContentsMCP1640/B/C/D - 0.65V Start-up Synchronous Boost Regulator with TrueOutput Disconnect or Input/Output Bypass Option11.0 Electrical Characteristics32.0 Typical Performance Curves5FIGURE 2-1: VOUT IQ vs. Ambient Temperature in PFM Mode.5FIGURE 2-2: VOUT IQ vs. Ambient Temperature in PWM Mode.5FIGURE 2-3: Maximum IOUT vs. VIN.5FIGURE 2-4: 2.0V VOUT PFM / PWM Mode Efficiency vs. IOUT.5FIGURE 2-5: 3.3V VOUT PFM / PWM Mode Efficiency vs. IOUT.5FIGURE 2-6: 5.0V VOUT PFM / PWM Mode Efficiency vs. IOUT.5FIGURE 2-7: 3.3V VOUT vs. Ambient Temperature.6FIGURE 2-8: 3.3V VOUT vs. Ambient Temperature.6FIGURE 2-9: 3.3V VOUT vs. VIN.6FIGURE 2-10: Minimum Start-up and Shutdown VIN into Resistive Load vs. IOUT.6FIGURE 2-11: FOSC vs. Ambient Temperature.6FIGURE 2-12: PWM Pulse Skipping Mode Threshold vs. IOUT.6FIGURE 2-13: Input No Load Current vs. VIN.7FIGURE 2-14: N-Channel and P-Channel RDSON vs. > of VIN or VOUT.7FIGURE 2-15: PFM / PWM Threshold Current vs. VIN.7FIGURE 2-16: MCP1640 3.3V VOUT PFM Mode Waveforms.7FIGURE 2-17: MCP1640B 3.3V VOUT PWM Mode Waveforms.7FIGURE 2-18: MCP1640/B High Load Waveforms.7FIGURE 2-19: 3.3V Start-up After Enable.8FIGURE 2-20: 3.3V Start-up when VIN = VENABLE.8FIGURE 2-21: MCP1640 3.3V VOUT Load Transient Waveforms.8FIGURE 2-22: MCP1640B 3.3V VOUT Load Transient Waveforms.8FIGURE 2-23: MCP1640B 2.0V VOUT Load Transient Waveforms.8FIGURE 2-24: 3.3V VOUT Line Transient Waveforms.83.0 Pin Descriptions9TABLE 3-1: Pin Function Table93.1 Switch Node Pin (SW)93.2 Ground Pin (GND)93.3 Enable Pin (EN)93.4 Feedback Voltage Pin (FB)93.5 Output Voltage Pin (VOUT)93.6 Power Supply Input Voltage Pin (VIN)93.7 Signal Ground Pin (SGND)93.8 Power Ground Pin (PGND)93.9 Output Voltage Sense Pin (VOUTS)93.10 Output Voltage Power Pin (VOUTP)93.11 Exposed Thermal Pad (EP)94.0 Detailed Description114.1 Device Option Overview11TABLE 4-1: Part Number Selection114.2 Functional Description12FIGURE 4-1: MCP1640/B/C/D Block Diagram.125.0 Application Information155.1 Typical Applications155.2 Adjustable Output Voltage Calculations155.3 Input Capacitor Selection155.4 Output Capacitor Selection15TABLE 5-1: Capacitor Value Range155.5 Inductor Selection16TABLE 5-2: MCP1640/B/C/D Recommended Inductors165.6 Thermal Calculations165.7 PCB Layout Information16FIGURE 5-1: MCP1640/B/C/D SOT23-6 Recommended Layout.17FIGURE 5-2: MCP1640/B/C/D DFN-8 Recommended Layout.176.0 Typical Application Circuits19FIGURE 6-1: Manganese Lithium Coin Cell Application Using Bypass Mode.19FIGURE 6-2: USB On-The-Go Powered by Li-Ion.197.0 Packaging Information217.1 Package Marking Information21Appendix A: Revision History27Product Identification System29Worldwide Sales and Service32Size: 477 KBPages: 32Language: EnglishOpen manual
Data SheetTable of ContentsTrademarks2Preface5Introduction5Document Layout5Conventions Used in this Guide6Recommended Reading7The Microchip Web Site7Customer Support7Document Revision History7Chapter 1. Product Overview91.1 Introduction91.2 MCP1640 Short Overview91.3 What is the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design?111.4 What Does the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design Kit Include?11Chapter 2. Installation and Operation132.1 Introduction132.2 Getting Started15Appendix A. Schematic and Layouts19A.1 Introduction19A.2 Board – Schematic20A.3 Board – Top Silk and Pads21A.4 Board – Top Copper and Pads22A.5 Board – Bottom Copper and Pads23Appendix B. Bill of Materials25Worldwide Sales and Service26Size: 490 KBPages: 26Language: EnglishOpen manual
