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MCP1640T-I/CHY

MCHPMCP1640T-I/CHY

Microchip Technology
Boost Switching Regulator IC Positive Adjustable 2V 1 Output 350mA SOT-23-6
Active40,216 in stock
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Overview

The MCP1640T-I/CHY is a compact, high-efficiency synchronous boost regulator designed to provide a 2V to 5.5V output from low-voltage sources. It features a very low start-up voltage of 0.65V and a low quiescent current of 19 microamps, making it ideal for applications powered by single-cell alkaline or NiMH batteries. The device integrates both the N-channel boost switch and the P-channel synchronous rectifier to minimize external component count.

Why Choose This Part

This regulator offers up to 96% efficiency and includes a 'True Disconnect' feature that isolates the output from the input during shutdown. It simplifies design with internal compensation and soft-start circuitry, while the 500kHz switching frequency allows for the use of small surface-mount inductors and capacitors.

Applications

Single-Cell Battery Powered Devices
Boosting voltage from a single AA or AAA alkaline, NiCd, or NiMH battery to power 3.3V or 5V logic.
Energy Harvesting
Capturing power from low-voltage sources like solar cells or thermopiles that require a low 0.65V start-up threshold.
Portable Medical Instruments
Powering handheld diagnostics and pulse oximeters where high efficiency and small SOT-23 footprint are critical.
Wireless Sensor Nodes
Providing power to IoT sensors while maintaining long battery life through its low 19 microamp quiescent current.

Key Specifications

Function Step-Up
Topology Boost
Output Type Adjustable
Mounting Type Surface Mount
Package / Case SOT-23-6
Current - Output 350mA
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 500kHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 5.5V
Voltage - Input (Min) 0.8V
Voltage - Output (Max) 5.5V
Supplier Device Package SOT-23-6
Voltage - Output (Min/Fixed) 2V

Getting Started

To evaluate this part, use the MCP1640 Evaluation Board (ADM00458) which provides a pre-configured circuit for testing different load conditions. Ensure the input and output ceramic capacitors are placed as close as possible to the SOT-23-6 pins to minimize power ground loops and EMI.

MCP1640 Family

Part NumberDifferenceStock
MCP1640T-E/OT E/OT —
MCP1640T-I/SN SN —
Also available as: MCP1640

Also Consider

MCP1624 MCHPMicrochip Technology - A similar boost regulator optimized specifically for lower output current applications with reduced cost.
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