MCP1640EV-SBC(2): Boost 3.3V or 5V, 0.35~5.5Vin


* Output current is dependent on input voltage.

The MCP1640 is a compact, high-efficiency, fixed frequency, synchronous step-up dc-dc converter. It provides an easy-to-use power supply solution for applications powered by one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries in addition to distributed 3.3V to 5.0V applications.

The MCP1640 is capable of regulating the output voltage over a wide 2.0V to 5.5V range and typically can deliver over 100 mA of load current at 3.3V output when supplied from a single 1.2V cell. The input voltage range is 0.35V to 5.5V with a low 0.65V start-up voltage. The regulated output voltage, Vout should be greater than or equal to the input voltage, Vin.

The MCP1640 Evaluation Board offers both package types in two boost-converter applications for 2.0V, 3.3V and 5.0V output voltage options that can be selected using a mini dip switch. The enable input is controlled in both boost converter applications using a mini dip switch.


Manufacturer Microchip Technology
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number MCP1640EV-SBC-ND
Eval Board Supplier Microchip Technology
Eval Board Normally In Stock
Topology Step Up
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set 3.3 V
5 V
Current Out 100 mA
300 mA
Voltage In 0.35 ~ 5.5 V
Efficiency @ Conditions >87%, 2.5V in, 5V @ 2 ~ 300 mA
>80%, 2.5V in, 3.3V @ 0.3 ~ 330 mA Out
>72%, 1.2V in, 5V @ 1 ~ 100 mA Out
>70%, 0.8V in, 3.3V @ 1 ~ 60 mA Out
Voltage Out Range 2 ~ 5.5 V
Features Current Limit (Adj. or Fixed)
Shutdown, Enable, Standby
Thermal Protection
Switching Frequency 500 kHz
Standby Current [Typical] 700 nA
Quiescent Current [Typical] 220 µA
Component Count + Extras 9 + 4
Internal Switch Yes
Design Author Microchip
Application / Target Market BlueTooth Headsets
MP3 Players
Portable Devices
Standby Current [Maximum] 2.3 µA
Quiescent Current [Maximum]
Main I.C. Base Part MCP1640

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