MICROCHIP MCP1640BT DC-DC Boost Step Up Regulator, Adjustable 2V-5.5V Out, 350m

The MICROCHIP MCP1640BT is a compact, high-efficiency, fixed-frequency, synchronous step-up DC-DC converter, presented in an SOT-23-6 package. This regulator offers a versatile and user-friendly power supply solution, ideal for devices powered by a wide range of battery sources including single-cell, two-cell, or three-cell alkaline, NiCd, or NiMH batteries, as well as one-cell Li-Ion or Li-Polymer batteries.

Engineered for superior performance, it integrates a low-resistance N-channel boost switch and a synchronous P-channel switch, achieving remarkable efficiency levels of up to 96%. Its advanced low-voltage technology allows the device to start up from an input as low as 0.65V without causing high inrush current or output voltage overshoot.

Key Features & Operation

• High Efficiency Design: Integration of internal switches and synchronous rectification minimises power loss.
• Automatic Mode Switching: Features automatic PFM/PWM operation for optimal efficiency across varying load conditions.
• Low Quiescent Current: Consumes only 19µA in PFM mode under no-load conditions, extending battery life in portable applications.
• True Load Disconnect: In shutdown mode (EN = GND), it provides a complete disconnect between input and output, with a shutdown current of less than 1µA.
• Comprehensive Protection: Includes inrush current limiting, internal soft-start, over-temperature protection, and low-noise anti-ringing control for stable and reliable operation.
• Simplified Design: All necessary compensation and protection circuitry is integrated internally, significantly reducing the number of external components required for a complete solution.

Technical Specifications

• Topology: Synchronous Boost (Step-Up)
• Input Voltage Range: 0.65V to 5.5V
• Output Voltage Range: Adjustable from 2V to 5.5V
• **Output/Max.​