Version 15
    Microchip > Power Management > Step-Up (Boost) Regulator >


    • It can be powered by one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries
    • Input voltage range (VIN ): 0.35V to 5.5V, with VIN ≤ VOUT
    • Fixed output voltage: 2.0V or 3.3V and 3.3V or 5.0V, selected using a mini-dip switch on board
    • Output current: typical 125 mA @ 3.3V Output, 1.5V Input or 200 mA @ 5.0V Output, 3V Input
    • Start-up voltage: 0.82V (for MCP16251’s Converter) or 0.65V (for MCP1640B’s Converter) at VOUT = 3.3V and IOUT= 1mA, resistive load
    • Automatic PFM/PWM Operation for the MCP16251 Converter
    • PWM Switching Frequency = 500 kHz
    • Enable state, selectable using the mini-dip switch on board
    • Peak Input Current Limit (800mA for MCP1640 or 650mA for MCP16251)
    • Over-temperature Protection


    The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board is used to evaluate and demonstrate Microchip Technology’s MCP16251 and MCP1640B products. This board demonstrates the MCP16251/MCP1640B in two boost-converter applications with multiple output voltages.

    It can be used to evaluate both package options (SOT-23-6 and 2x3 mm 8-(T)DFN). The MCP16251 and MCP1640B Synchronous Boost Converters Evaluation Board was developed to help engineers reduce the product design cycle time. Three common output voltages can be selected: 2.0V, 3.3V and 5.0V.

    The output voltage can be changed with a mini-dip switch that changes the external resistor divider. A switch connected to the EN pin is used to enable and disable the converters. When enabled, the MCP16251/MCP1640B will regulate the output voltage; when disabled, the MCP16251/MCP1640B disconnects the path from input to output for “true-disconnect”.

    Key Applications:

    • One, Two and Three Cell Alkaline and NiMH/NiCd
      Portable Products
    • Solar Cell Applications
    • Personal Care and Medical Products
    • Bias for Status LEDs
    • Smartphones, MP3 Players, Digital Cameras
    • Remote controllers, Portable Instruments
    • Wireless Sensors
    • Bluetooth Headsets
    • 3.3V to 5.0V Distributed Power Supply