MCHPMCP1640T-I/MC
Overview
The MCP1640T-I/MC is a high-efficiency, synchronous step-up DC-DC converter designed to provide a boosted output voltage from low-voltage sources such as single-cell alkaline or NiMH batteries. It features a low 0.65V start-up voltage and integrates both the N-channel boost switch and P-channel synchronous rectifier to minimize external component count. This regulator is particularly effective for portable electronics requiring a 350mA output current and very low standby power consumption.
Why Choose This Part
The device offers a 'True Disconnect' feature that eliminates the leakage path from input to output during shutdown, preserving battery life. Its 500kHz switching frequency balances efficiency with small inductor size, while the internal compensation simplifies the control loop design for engineers. The 2mm x 3mm DFN package provides excellent thermal performance and a compact footprint for space-constrained PCB layouts.
Applications
Key Specifications
Getting Started
For rapid prototyping, Microchip offers the MCP1640EV-SBC Evaluation Board which demonstrates the IC in a typical battery-powered configuration. When designing the PCB, place the input and output ceramic capacitors as close as possible to the DFN pins to minimize parasitic inductance. Use a thick trace for the LX node and ensure the exposed thermal pad is soldered to a ground plane for optimal heat dissipation.
MCP1640 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Stock |
|---|---|---|
| MCP1640T-I/MC (this part) | VFDFN-8 | 13,264 |
| MCP1640T-I/CHY | 6-23 | 40,216 |
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